C — https://mercari.com | BeaverCheck Audit

Site Health

Score: 70 / 100

Based on 8 categories, 0 sections

Room to improve — your 18.3s load time is above Google's 2.5s 'Good' threshold.

Several missing protections leave your users and data exposed.

Several issues make your site difficult for assistive technology users.

Missing signals may be hurting your search visibility.

Solid infrastructure — fast server responses across the board.

Mostly compliant — a few items need attention.

Missing metadata means poor previews on social media and search.

Heavier than average — reducing page weight saves energy and bandwidth.

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

How the composite score is calculated

How you compare

Amazon Route 53 · 975 peers

You 70

Avg 72

At average

0 50 100

Better than 14% of Amazon Route 53 sites See full Amazon Route 53 benchmark →

AngularJS · 399 peers

You 70

Avg 73

At average

0 50 100

Better than 14% of AngularJS sites See full AngularJS benchmark →

Top Priorities (5)

Content-Security-Policy header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers

HSTS header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers

No Content-Security-Policy header found

Security gaps expose your site and users to attacks, eroding trust.

Security › Content Security Policy

Page weighs 16.7 MB (7.7 MB transferred)

Performance issues directly impact user engagement and conversion rates.

Performance › Page Weight Budget

296 third-party resources (100% of weight)

Performance issues directly impact user engagement and conversion rates.

Performance › Page Weight Inventory

View fix priority matrix

Fix Priority Matrix

5 findings

Impact

Quick Wins

High impact, low effort — start here.

Strategic

High impact, requires investment.

Easy Improvements

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →

Embed this badge

Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fmercari.com)](https://beavercheck.com/results/5a566e7a-7ef3-4f3b-aac2-955525539862)

HTML

<a href="https://beavercheck.com/results/5a566e7a-7ef3-4f3b-aac2-955525539862"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fmercari.com" alt="BeaverCheck Score"></a>

Image URL

https://beavercheck.com/badge?url=https%3A%2F%2Fmercari.com

This badge auto-updates with your latest scan result.

What fixing these means

Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. Your LCP of 18.3s exceeds Google's 2.5s 'Good' threshold and the 2 performance issues below directly contribute to it. Addressing the critical issues below would have the most immediate impact on your user trust.

3 security gaps detected — browsers may warn visitors about your site.

Your LCP is 18.3s — fixing the 2 performance criticals could bring it under Google's 2.5s 'Good' threshold.

Conversion Barriers

2 critical 7 warning

9 barrier(s) likely increasing bounce by ~32%.

Speed (2)

Page takes 18.3s to load

+12% bounce

Users abandon at ~3s — you're 15.8s over the 2.5s threshold

Fix: Optimize render-blocking resources, preload the hero image, and compress images

Page feels frozen for 7.6s

+5% bounce

Clicks on the primary CTA are ignored while JavaScript runs

Fix: Break up long tasks; defer non-critical JavaScript to post-hydration

Trust (2)

No HSTS header

+1% bounce

Returning visitors are briefly exposed to downgrade attacks on first request

Fix: Set Strict-Transport-Security: max-age=31536000; includeSubDomains

No Content-Security-Policy header

+1% bounce

Higher XSS blast radius — one compromised script can exfiltrate the checkout form

Fix: Ship a reporting-only CSP first, then enforce once violations are clean

Usability (1)

Layout shifts during page load

+3% bounce

Content movement causes mis-clicks on CTAs and form fields

Fix: Add width/height to images; reserve space for late-loading embeds

Content (3)

No Open Graph tags

+2% bounce

Links shared on LinkedIn / Slack / Facebook show bare URLs — referral clicks drop

Fix: Add og:title, og:description, og:image, og:url to the page head

No structured data

+2% bounce

No rich-result eligibility in Google — lower SERP CTR vs competitors with stars and prices

Fix: Add JSON-LD for your page type (Product, Article, FAQPage, LocalBusiness, …)

Thin content

+3% bounce

Under 300 words — visitors bounce looking for substance, search engines rank competitors first

Fix: Add a substantive FAQ, product detail, or case-study section

Navigation (1)

No skip-to-content link

+1% bounce

Keyboard and screen-reader users must tab through the entire header on every page

Fix: Add a visible-on-focus <a href="#main">Skip to content</a> as the first focusable element

Preliminary CRO audit — each barrier links to the tab with detailed analysis.

Return on Investment

$550 investment → $1.94/month returns + USD 150,000 risk avoided

Payback period: > 2 years First-year ROI: -96%

Investment

$550

6h · 5 findings

Monthly returns

$1.94 /mo

~$23 / year

Bandwidth savings $1.94

Regulatory risk avoided

USD 150,000

if kept compliant

ADA Title III USD 150,000

$150 — in quick wins — start here for the fastest payback

Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.

Full methodology & sources

Estimated Remediation Cost

$550

5.5 developer hours at $100/hr

Based on United States rates ($100/hr)

Quick wins

$150 3 fixes in ~90 minutes

Start here for the best return on investment

Cost by category

Cost by effort level

Adjust assumptions

Custom rate

$ /hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

What Inaction Is Costing You

$12,502 / month at risk

~$150,023 / year if left unfixed

Compliance Risk

$150,000

ADA Title III

No <nav> landmark found
ADA Title III: USD 25,000 – USD 150,000
Skip navigation link is missing (WCAG 2.4.1)
ADA Title III: USD 25,000 – USD 150,000

Bandwidth Waste

$1.94 /mo

24242.1 MB/mo × 0.080 USD/GB

Optimize transfer: save ~2.4 MB per page load
Saves $1.94/mo

Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.

Compliance methodology · SEO assumptions · Bandwidth model

Your performance is already good — improvements may show diminishing returns

Monthly visitors

Unique monthly visitors from your analytics

Conversion rate (%)

Purchases, signups, or key actions

Avg. order value

Optional — for revenue estimation

additional conversions/month

more engaged visitors from reduced bounce

potential monthly revenue

Current bounce (est.)

After fixes (est.)

Estimated bounce reduction

Fix 4 critical issues to capture this value

How this is calculated

Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.

Your site's LCP: → estimated after fixes.

These are estimates based on industry research — actual results vary

Bounce-rate model & assumptions

Your data stays in your browser — nothing is sent to our servers

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

Accessibility

Best Practices

SEO

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.53 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

18.31 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

7.57 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.139

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

14.69 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

39.94 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more ▾

Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.

Source: Google web.dev / Lighthouse

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
/appboy/communication/assets/image_assets/images/69dd83e2...	14400.0 s	1.6 MiB
cdn.quadpay.com/v1/quadpay.js	3600.0 s	202.0 KiB
connect.facebook.net/en_US/fbevents.js	1200.0 s	96.6 KiB
/appboy/communication/assets/font_assets/files/640b79dd13...	14400.0 s	92.5 KiB
/signals/config/332253387150322?v=2.9.303&r=stable&domain...	1200.0 s	44.9 KiB
/appboy/communication/assets/font_assets/files/62d01145ac...	14400.0 s	34.3 KiB
u-web-assets.mercdn.net/sdk/adyen/adyen.encrypt.nodom.min.js	3600.0 s	17.2 KiB
/notice?domain=mercari.com&c=teconsent&js=nj&noticeType=b...	3600.0 s	13.4 KiB
www.mercari.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?	14400.0 s	14.8 KiB
/assets/img/banners/section_header_hellogoodbye_mobile.pn...	3600.0 s	9.3 KiB
appleid.cdn-apple.com/appleauth/static/jsapi/appleid/1/en_US/appleid.auth.js	86400.0 s	17.4 KiB
consent.trustarc.com/autoblockasset/core.min.js?domain=mercari.com	3600.0 s	6.6 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...	86400.0 s	10.7 KiB
consent.trustarc.com/autoblockoptout?domain=mercari.com	3600.0 s	2.0 KiB
use.fontawesome.com/7f85a56ba4.css	1800.0 s	864 B
www.gstatic.com/recaptcha/api2/logo_48.png	604800.0 s	2.3 KiB
/tr/?id=332253387150322&ev=PageView&dl=https%3A%2F%2Fwww....	0.0 ms	19 B

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]

items: [map[node:map[type:text value:Total] score:0.000156] map[node:map[boundingRect:map[bottom:775 height:36 left:90 right:322 top:739 width:231] lhId:page-21-DIV nodeLabel:Do not sell or share my personal info path:1,HTML,1,BODY,1,DIV,2,DIV,0,DIV,3,DIV selector:div#consent_blackbar > div#truste-consent-track > div#truste-consent-content > div.donotsell snippet:<div class="donotsell"> type:node] score:0.000156 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:602 height:21 left:171 right:187 top:581 width:16] lhId:page-27-IMG nodeLabel:mercari-lock-icon path:1,HTML,1,BODY,1,DIV,2,DIV,0,DIV,0,DIV,1,DIV,0,IMG selector:div#truste-consent-content > div#truste-banner-header > div#truste-consent-icon > img snippet:<img src="//consent.trustarc.com/get?name=mercari-lock-icon-dark-gray.svg" alt="mercari-lock-icon"> type:node]]] type:subitems]]]

items: [map[node:map[type:text value:Total] score:0.138677] map[node:map[boundingRect:map[bottom:1629 height:329 left:0 right:412 top:1300 width:412] lhId:page-23-DIV nodeLabel:women path:1,HTML,1,BODY,5,DIV,1,DIV,6,DIV,0,DIV,7,DIV,0,DIV,0,DIV selector:div.AnonCards__CardContainer-sc-1b3efe2a-0 > div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > div.FitToContainer__FitToContainerInner-sc-daf9ec2e-0 snippet:<div data-testid="FitScroller" class="FitToContainer__FitToContainerInner-sc-daf9ec2e-0 cgdwIy"> type:node] score:0.138677]]

items: [map[node:map[type:text value:Total] score:0.005146] map[node:map[boundingRect:map[bottom:608 height:392 left:15 right:397 top:215 width:382] lhId:page-1-DIV nodeLabel:Live now: Flash Sale Event! ⚡ Enter code APRFLASH10 by 04/24/26 11:59 pm PDT to… path:1,HTML,1,BODY,1,DIV,0,DIV,1,DIV selector:body > div#iqxm > div#i0r7 > div#iom3 snippet:<div role="dialog" aria-modal="true" data-form-id="default-form" aria-label="Container" id="iom3" data-modal-styles-new="true" class="bz-modal" style="display: flex;"> type:node] score:0.005146 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:406 height:190 left:15 right:397 top:215 width:382] lhId:page-0-IMG nodeLabel:div.bz-sctn > div#i6jwb > div#ijviu > img#iq5gr path:1,HTML,1,BODY,1,DIV,0,DIV,1,DIV,1,DIV,0,DIV,0,DIV,0,IMG selector:div.bz-sctn > div#i6jwb > div#ijviu > img#iq5gr snippet:<img alt="" src="https://braze-images.com/appboy/communication/assets/image_assets/images/6…" id="iq5gr" aria-hidden="true" class="bz-img"> type:node]] map[cause:Web font extra:map[type:url value:https://braze-images.com/appboy/communication/assets/font_assets/files/640b79dd13d15a1271248f24/original.otf?1678473693]] map[cause:Web font extra:map[type:url value:https://braze-images.com/appboy/communication/assets/font_assets/files/62d01145ac6b5b3f18106b78/original.woff?1657803077]]] type:subitems]]]

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:31.156 source:map[column:128179 line:1 type:source-location url:https://u-web-assets.mercdn.net/builds/r-v1.26.1585/_next/static/chunks/framework-410df72d408e49c5.js urlProvider:network]]]

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:65.151 source:map[type:text value:[unattributed]]] map[reflowTime:1.418 source:map[column:23921 line:0 type:source-location url:https://consent.trustarc.com/notice?domain=mercari.com&c=teconsent&js=nj&noticeType=bb&text=true urlProvider:network]] map[reflowTime:3.321 source:map[column:266606 line:1 type:source-location url:https://cdn.quadpay.com/v1/quadpay.js urlProvider:network]] map[reflowTime:30.484 source:map[column:16205 line:1307 type:source-location url:https://u-web-assets.mercdn.net/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae3cec2930a6d.js urlProvider:network]] map[reflowTime:31.156 source:map[column:27847 line:0 type:source-location url:https://u-web-assets.mercdn.net/builds/r-v1.26.1585/_next/static/chunks/3418-467797429c47916c.js urlProvider:network]] map[reflowTime:1.519 source:map[column:332 line:412 type:source-location url:https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js urlProvider:network]] map[reflowTime:1.256 source:map[column:55 line:930 type:source-location url:https://www.mercari.com/ko40/?id=G-DJ5N7E6D07&cx=c&gtm=4e64k1 urlProvider:network]]]

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
div.bz-sctn > div#i6jwb > div#ijviu > img#iq5gr `div.bz-sctn > div#i6jwb > div#ijviu > img#iq5gr`	/appboy/communication/assets/image_assets/images/69dd83e2...	1.6 MiB	1.6 MiB
athleticapparel `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/athleticapparel.png	139.9 KiB	123.4 KiB
tradingcards `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/tradingcards.png	135.0 KiB	108.5 KiB
women `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/women.png	109.3 KiB	92.6 KiB
kids `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/kids.png	105.7 KiB	89.6 KiB
sneakers `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/sneakers.png	98.8 KiB	87.1 KiB
figurines `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/figurines.png	102.4 KiB	82.3 KiB
gaming `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/gaming.png	72.1 KiB	57.9 KiB
men `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/men.png	59.3 KiB	50.3 KiB
home `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/home.png	53.5 KiB	45.3 KiB
downloadtheapp `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/mobile/downloadtheapp.png	51.2 KiB	33.3 KiB
toys `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/mobile/toys.png	35.0 KiB	20.7 KiB
beauty `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/mobile/beauty.png	32.3 KiB	19.1 KiB
handbags `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/mobile/handbags.png	27.6 KiB	16.3 KiB
Retro 4 “Thunder” Black and Yellow US size 10.5 - Air Jordan `div.Thumb__StyledProductThumbWrapper-sc-166684af-1 > div.Flex-sc-92a9411d-0 > div.Product__CDNImageWrapper-sc-c3a991-1 > img.CDNImage__StyledNextImage-sc-2e57b269-0`	/photos/m32250349483_1.jpg?width=256&quality=75&_=1776896846	19.5 KiB	8.8 KiB
electronics `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/mobile/electronics.png	13.8 KiB	8.2 KiB
Women’s Lace-Up Wedges - TOMS `div.Thumb__StyledProductThumbWrapper-sc-166684af-1 > div.Flex-sc-92a9411d-0 > div.Product__CDNImageWrapper-sc-c3a991-1 > img.CDNImage__StyledNextImage-sc-2e57b269-0`	/photos/m94542569987_1.jpg?width=256&quality=75&_=1775046903	18.7 KiB	8.1 KiB
Chicago Blackhawks Chris Chelios Retirement Banner, scarf, bucket and winter hat `div.Thumb__StyledProductThumbWrapper-sc-166684af-1 > div.Flex-sc-92a9411d-0 > div.Product__CDNImageWrapper-sc-c3a991-1 > img.CDNImage__StyledNextImage-sc-2e57b269-0`	/photos/m40513111824_1.jpg?width=256&quality=75&_=1769776532	17.3 KiB	6.7 KiB
Just Dance Kids 2 ( Xbox 360, 2011) Game, Case, and Instruction Manual - Micros… `div.Thumb__StyledProductThumbWrapper-sc-166684af-1 > div.Flex-sc-92a9411d-0 > div.Product__CDNImageWrapper-sc-c3a991-1 > img.CDNImage__StyledNextImage-sc-2e57b269-0`	/photos/m67787930342_1.jpg?width=256&quality=75&_=1775038868	15.7 KiB	5.0 KiB
Dale Jarrett Figure NASCAR Stock Race Car 1998 Champion Christmas Ornament `div.Thumb__StyledProductThumbWrapper-sc-166684af-1 > div.Flex-sc-92a9411d-0 > div.Product__CDNImageWrapper-sc-c3a991-1 > img.CDNImage__StyledNextImage-sc-2e57b269-0`	/photos/m47098709986_1.jpg?width=256&quality=75&_=1775048803	10.8 KiB	4.7 KiB
Leinenkugels Beer Visor Red Embroidered Logo Adjustable Golf Brewery Casual `div.Thumb__StyledProductThumbWrapper-sc-166684af-1 > div.Flex-sc-92a9411d-0 > div.Product__CDNImageWrapper-sc-c3a991-1 > img.CDNImage__StyledNextImage-sc-2e57b269-0`	/photos/m76025693463_1.jpg?width=256&quality=75&_=1775049483	15.1 KiB	4.4 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-20-IMG

nodeLabel: Live now! April 22 - April 24 flash sale event! Coupon for 10% off item price(s…

path: 1,HTML,1,BODY,5,DIV,1,DIV,5,DIV,0,A,0,IMG

selector: div > div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > img.CDNImage__StyledNextImage-sc-2e57b269-0

snippet: <img alt="Live now! April 22 - April 24 flash sale event! Coupon for 10% off item pr…" loading="lazy" width="750" height="320" decoding="async" data-nimg="1" class="CDNImage__StyledNextImage-sc-2e57b269-0 jyHTcX AnonBanner__StyledImage-sc-…" srcset="https://u-web-assets.mercdn.net/assets/banner/anon-banner-april-flash-mobi…" src="https://u-web-assets.mercdn.net/assets/banner/anon-banner-april-flash-mobi…" style="color: transparent;">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
u-web-assets.mercdn.net/assets/styles/dist/styles.min.css	2.7 KiB	154 ms

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
/appboy/communication/assets/font_assets/files/640b79dd13...	20 ms
u-web-assets.mercdn.net/assets/fonts/averta/averta-bold-webfont.woff2	15 ms
/appboy/communication/assets/font_assets/files/62d01145ac...	15 ms
consent.trustarc.com/get?name=averta-semibold.woff	10 ms
consent.trustarc.com/get?name=averta-regular.woff	10 ms
u-web-assets.mercdn.net/assets/fonts/averta/averta-regular-webfont.woff2	10 ms
u-web-assets.mercdn.net/assets/fonts/averta/averta-semibold-webfont.woff2	10 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2	5.0 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 757 ms

URL	Time Spent
mercari.com/	757 ms
www.mercari.com/	0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Why this matters

Performance issues directly impact user engagement and conversion rates.

Element	Layout shift score
women `div.AnonCards__CardContainer-sc-1b3efe2a-0 > div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > div.FitToContainer__FitToContainerInner-sc-daf9ec2e-0`	0.139
Live now: Flash Sale Event! ⚡ Enter code APRFLASH10 by 04/24/26 11:59 pm PDT to… `body > div#iqxm > div#i0r7 > div#iom3`	0.005
Do not sell or share my personal info `div#consent_blackbar > div#truste-consent-track > div#truste-consent-content > div.donotsell`	0.000

Diagnostics

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more ▾

This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.

Source: Google web.dev / Lighthouse

Estimated savings: 3.2 s 1.5 MiB

URL	Transfer Size	Est Savings
/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae...	649.5 KiB	286.4 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	361.8 KiB	177.0 KiB
cdn.quadpay.com/v1/quadpay.js	201.6 KiB	130.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-MSDTXHX	166.9 KiB	109.3 KiB
www.mercari.com/ko40/gtd?id=AW-dynamic_home&cx=c&gtm=4e64k1	139.6 KiB	84.2 KiB
www.mercari.com/ko40/?id=G-DJ5N7E6D07&cx=c&gtm=4e64k1	177.1 KiB	73.1 KiB
www.mercari.com/ko40/	175.1 KiB	70.6 KiB
accounts.google.com/gsi/client	95.5 KiB	68.2 KiB
www.mercari.com/ko40/?id=DC-9344415&cx=c&gtm=4e64k1	134.9 KiB	66.2 KiB
www.mercari.com/ko40/?id=DC-13580167&cx=c&gtm=4e64k1	136.3 KiB	66.1 KiB
www.mercari.com/ko40/?id=DC-13949580&cx=c&gtm=4e64k1	135.4 KiB	66.0 KiB
www.mercari.com/ko40/gtd?id=AW-828932699&cx=c&gtm=4e64k1	142.9 KiB	65.0 KiB
www.mercari.com/ko40/?id=AW-782098151&cx=c&gtm=4e64k1	149.5 KiB	62.2 KiB
www.mercari.com/ko40/?id=AW-880627815&cx=c&gtm=4e64k1	149.5 KiB	61.4 KiB
connect.facebook.net/en_US/fbevents.js	96.5 KiB	33.5 KiB
/builds/r-v1.26.1585/_next/static/chunks/92924.1fd2d1cdd3...	60.4 KiB	25.5 KiB
consent.trustarc.com/asset/notice.js/v/v1.7-1729	36.0 KiB	22.1 KiB
/builds/r-v1.26.1585/_next/static/chunks/main-8a62d0182b0...	41.5 KiB	21.4 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
/builds/r-v1.26.1585/_next/static/chunks/framework-410df7...	7.3 s	6.6 s	22 ms
/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae...	6.9 s	4.6 s	302 ms
Unattributable	4.0 s	312 ms	0.0 ms
cdn.quadpay.com/v1/quadpay.js	1.2 s	819 ms	98 ms
www.mercari.com/	1.0 s	43 ms	5.4 ms
/builds/r-v1.26.1585/_next/static/chunks/28114-4e311b2e1d...	518 ms	434 ms	3.1 ms
www.mercari.com/ko40/?id=G-DJ5N7E6D07&cx=c&gtm=4e64k1	446 ms	385 ms	55 ms
www.mercari.com/ko40/?id=AW-880627815&cx=c&gtm=4e64k1	427 ms	360 ms	60 ms
www.mercari.com/cdn-cgi/challenge-platform/scripts/jsd/main.js	424 ms	408 ms	3.5 ms
www.mercari.com/ko40/?id=AW-782098151&cx=c&gtm=4e64k1	389 ms	337 ms	48 ms
/builds/r-v1.26.1585/_next/static/chunks/92924.1fd2d1cdd3...	384 ms	200 ms	32 ms
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	363 ms	237 ms	104 ms
/builds/r-v1.26.1585/_next/static/chunks/35407.b1a7ae4368...	348 ms	271 ms	1.4 ms
www.mercari.com/ko40/?id=DC-13580167&cx=c&gtm=4e64k1	342 ms	221 ms	69 ms
www.mercari.com/ko40/	333 ms	231 ms	63 ms
www.mercari.com/ko40/gtd?id=AW-828932699&cx=c&gtm=4e64k1	332 ms	294 ms	34 ms
www.mercari.com/ko40/?id=DC-13949580&cx=c&gtm=4e64k1	325 ms	256 ms	67 ms
www.mercari.com/ko40/?id=DC-9344415&cx=c&gtm=4e64k1	257 ms	217 ms	39 ms
/builds/r-v1.26.1585/_next/static/chunks/pages/index-c0d6...	196 ms	191 ms	1.0 ms
connect.facebook.net/en_US/fbevents.js	192 ms	155 ms	35 ms
www.mercari.com/ko40/gtd?id=AW-dynamic_home&cx=c&gtm=4e64k1	188 ms	147 ms	40 ms
/signals/config/332253387150322?v=2.9.303&r=stable&domain...	187 ms	163 ms	24 ms
www.googletagmanager.com/gtm.js?id=GTM-MSDTXHX	176 ms	83 ms	88 ms
/builds/r-v1.26.1585/_next/static/chunks/main-8a62d0182b0...	142 ms	128 ms	13 ms
/builds/r-v1.26.1585/_next/static/chunks/30130.33fbe4d438...	125 ms	113 ms	2.8 ms
consent.trustarc.com/asset/notice.js/v/v1.7-1729	103 ms	72 ms	15 ms
consent.trustarc.com/autoblockoptout?domain=mercari.com	97 ms	95 ms	0.7 ms
consent.trustarc.com/asset/uspapi.js	82 ms	76 ms	2.1 ms
accounts.google.com/gsi/client	65 ms	35 ms	27 ms
/notice?domain=mercari.com&c=teconsent&js=nj&noticeType=b...	54 ms	38 ms	4.9 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	18.2 s
Other	5.6 s
Style & Layout	1.4 s
Script Parsing & Compilation	1.3 s
Garbage Collection	791 ms
Rendering	418 ms
Parse HTML & CSS	112 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reason	Failure type
The page has an unload handler in the main frame.	Actionable

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
/appboy/communication/assets/image_assets/images/69dd83e2...	1.6 MiB
/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae...	650.1 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	362.4 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	361.9 KiB
cdn.quadpay.com/v1/quadpay.js	202.0 KiB
www.mercari.com/ko40/?id=G-DJ5N7E6D07&cx=c&gtm=4e64k1	177.2 KiB
www.mercari.com/ko40/	175.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-MSDTXHX	167.3 KiB
www.mercari.com/ko40/?id=AW-880627815&cx=c&gtm=4e64k1	149.7 KiB
www.mercari.com/ko40/?id=AW-782098151&cx=c&gtm=4e64k1	149.6 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
athleticapparel `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/athleticapparel.png
sneakers `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/sneakers.png
women `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/women.png
men `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/men.png
kids `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/kids.png
home `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/home.png
figurines `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/figurines.png
tradingcards `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/tradingcards.png
gaming `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/gaming.png
downloadtheapp `div.Container-sc-beaovl > div.Container-sc-beaovl > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/mobile/downloadtheapp.png
electronics `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/mobile/electronics.png
toys `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/mobile/toys.png
beauty `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/mobile/beauty.png
handbags `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/mobile/handbags.png
mercari-lock-icon `div#truste-consent-content > div#truste-banner-header > div#truste-consent-icon > img`	consent.trustarc.com/get?name=mercari-lock-icon-dark-gray.svg
Women `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/1.svg
Men `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/2.svg
Electronics `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/7.svg
Toys `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/1611.svg
Gaming `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/84.svg
Handbags `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/21.svg
Home `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/4.svg
Vintage `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/5.svg
Beauty `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/6.svg
Kids `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/3.svg
Sports `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/8.svg
Handmade `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/9.svg
Office `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/2882.svg
Pet `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/143.svg
Outdoor `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/2633.svg
Tools `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/3170.svg
Books `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/141.svg
View all `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/0.svg
American Express Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/american-express.svg
Visa Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/visa.svg
Paypal Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/paypal.svg
MasterCard Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/mastercard.svg
Discover Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/discover.svg
Zip Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/zip.svg
Paypal Pay in 4 Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/paypal-pay-in-4.svg
Apple Pay Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/apple-pay.svg
Venmo Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/venmo.svg
div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1 `div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/icons/icn-discount-arrow.svg

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●User Timing marks and measures 29 user timings

●Avoid long main-thread tasks 20 long tasks found

●Network Requests

●Network Round Trip Times 70 ms

●Server Backend Latencies 100 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 90 ms

○INP breakdown

○Avoid non-composited animations

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Women `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > h6.H7-sc-1e92cdr`
Apple `div.Container-sc-beaovl > div.Flex__Box-sc-92a9411d-1 > a.Link__StyledAnchor-sc-3b50994f-0 > h6.H6-sc-khsc0s`

These are opportunities to improve keyboard navigation in your application.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1 `div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
head > meta `head > meta`

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `html`

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Form elements have associated labels

●`button`, `link`, and `menuitem` elements have accessible names

●ARIA attributes are used as specified for the element's role

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<frame>` or `<iframe>` elements have a title

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links are distinguishable without relying on color.

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●Touch targets have sufficient size and spacing.

●`[lang]` attributes have a valid value

●Deprecated ARIA roles were not used

●Image elements do not have `[alt]` attributes that are redundant text.

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / Warning	Source
Unload event listeners are deprecated and will be removed.	/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae... line 1317, col 12527
SharedStorage	www.mercari.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	www.mercari.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	www.mercari.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
AttributionReporting	consent.trustarc.com/autoblockasset/core.min.js?domain=mercari.com line 4, col 17791

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

Source	Description
/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae... line 1317, col 7386	`[GSI_LOGGER]: FedCM get() rejects with NetworkError: Error retrieving a token.`
	`Framing 'https://www.google.com/' violates the following report-only Content Security Policy directive: "frame-ancestors 'self'". The violation has been logged, but no further action has been taken.`
www.mercari.com/	`Not signed in with the identity provider.`

Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Issue type
Content security policy

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

●Uses HTTPS

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
Do not sell or share my personal info `div#truste-consent-track > div#truste-consent-content > div.donotsell > a`

To appear in search results, crawlers need access to your app.

Content Best Practices

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1 `div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●robots.txt is valid

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

Best Practices

SEO

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

902 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

4.05 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

763 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.283

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

4.61 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

8.69 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Why this matters

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more ▾

Source: Google web.dev / Lighthouse

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Why this matters

Performance issues directly impact user engagement and conversion rates.

items: [map[node:map[type:text value:Total] score:0.000465] map[node:map[boundingRect:map[bottom:916 height:166 left:24 right:1326 top:750 width:1302] lhId:page-1-DIV nodeLabel:Privacy settings We use cookies to improve site experience, advertising, and ot… path:1,HTML,1,BODY,1,DIV,2,DIV selector:body.ab-pause-scrolling > div#consent_blackbar > div#truste-consent-track snippet:<div id="truste-consent-track" style="display:block;" class="ta-show ta-display-block"> type:node] score:0.000444 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:795 height:21 left:368 right:384 top:774 width:16] lhId:page-45-IMG nodeLabel:mercari-lock-icon path:1,HTML,1,BODY,1,DIV,2,DIV,0,DIV,0,DIV,1,DIV,0,IMG selector:div#truste-consent-content > div#truste-banner-header > div#truste-consent-icon > img snippet:<img src="//consent.trustarc.com/get?name=mercari-lock-icon-dark-gray.svg" alt="mercari-lock-icon"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:892 height:32 left:915 right:1105 top:860 width:190] lhId:page-2-DIV nodeLabel:Customize Got it path:1,HTML,1,BODY,1,DIV,2,DIV,0,DIV,2,DIV selector:div#consent_blackbar > div#truste-consent-track > div#truste-consent-content > div#truste-consent-buttons snippet:<div id="truste-consent-buttons" class="truste-buttonsColumn"> type:node] score:2.1e-05 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:795 height:21 left:368 right:384 top:774 width:16] lhId:page-45-IMG nodeLabel:mercari-lock-icon path:1,HTML,1,BODY,1,DIV,2,DIV,0,DIV,0,DIV,1,DIV,0,IMG selector:div#truste-consent-content > div#truste-banner-header > div#truste-consent-icon > img snippet:<img src="//consent.trustarc.com/get?name=mercari-lock-icon-dark-gray.svg" alt="mercari-lock-icon"> type:node]]] type:subitems]]]

items: [map[node:map[type:text value:Total] score:0.282654] map[node:map[boundingRect:map[bottom:5427 height:400 left:0 right:1350 top:5027 width:1350] lhId:page-4-DIV nodeLabel:Get the app. Sell or buy. Almost anything. path:1,HTML,1,BODY,5,DIV,1,DIV,6,DIV selector:body.ab-pause-scrolling > div#__next > div > div#getTheAppFooter snippet:<div id="getTheAppFooter" data-testid="GetTheApp" class="Container-sc-beaovl GetTheAppBanner__Wrapper-sc-69d5a855-0 caxKGN hEieq"> type:node] score:0.187234] map[node:map[boundingRect:map[bottom:5427 height:400 left:0 right:1350 top:5027 width:1350] lhId:page-4-DIV nodeLabel:Get the app. Sell or buy. Almost anything. path:1,HTML,1,BODY,5,DIV,1,DIV,6,DIV selector:body.ab-pause-scrolling > div#__next > div > div#getTheAppFooter snippet:<div id="getTheAppFooter" data-testid="GetTheApp" class="Container-sc-beaovl GetTheAppBanner__Wrapper-sc-69d5a855-0 caxKGN hEieq"> type:node] score:0.09542]]

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Est Savings
u-web-assets.mercdn.net/assets/fonts/averta/averta-bold-webfont.woff2	30 ms
consent.trustarc.com/get?name=averta-semibold.woff	20 ms
consent.trustarc.com/get?name=averta-regular.woff	20 ms
u-web-assets.mercdn.net/assets/fonts/averta/averta-semibold-webfont.woff2	20 ms
/appboy/communication/assets/font_assets/files/640b79dd13...	20 ms
/appboy/communication/assets/font_assets/files/62d01145ac...	15 ms
u-web-assets.mercdn.net/assets/fonts/averta/averta-regular-webfont.woff2	10 ms
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2	5.0 ms

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:36.711 source:map[column:177605 line:1 type:source-location url:https://u-web-assets.mercdn.net/builds/r-v1.26.1585/_next/static/chunks/framework-410df72d408e49c5.js urlProvider:network]]]

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:48.191 source:map[type:text value:[unattributed]]] map[reflowTime:1.906 source:map[column:23921 line:0 type:source-location url:https://consent.trustarc.com/notice?domain=mercari.com&c=teconsent&js=nj&noticeType=bb&text=true urlProvider:network]] map[reflowTime:6.765 source:map[column:16205 line:1307 type:source-location url:https://u-web-assets.mercdn.net/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae3cec2930a6d.js urlProvider:network]] map[reflowTime:57.784 source:map[column:10591 line:0 type:source-location url:https://u-web-assets.mercdn.net/builds/r-v1.26.1585/_next/static/chunks/11674-0b0c8e8a689e7377.js urlProvider:network]] map[reflowTime:2.2 source:map[column:376 line:895 type:source-location url:https://www.mercari.com/ko40/?id=G-DJ5N7E6D07&cx=c&gtm=4e64k1 urlProvider:network]]]

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG

nodeLabel: Live now! April 22 - April 24 flash sale event! Coupon for 10% off item price(s…

path: 1,HTML,1,BODY,5,DIV,1,DIV,3,DIV,0,DIV,0,A,0,IMG

selector: div.Container-sc-beaovl > div.Banner__AnonWrapper-sc-c8222229-0 > a.Link__StyledAnchor-sc-3b50994f-0 > img.CDNImage__StyledNextImage-sc-2e57b269-0

snippet: <img alt="Live now! April 22 - April 24 flash sale event! Coupon for 10% off item pr…" loading="lazy" width="2880" height="684" decoding="async" data-nimg="1" class="CDNImage__StyledNextImage-sc-2e57b269-0 jyHTcX AnonBanner__StyledImage-sc-…" srcset="https://u-web-assets.mercdn.net/assets/banner/anon-banner-april-flash-desk…" src="https://u-web-assets.mercdn.net/assets/banner/anon-banner-april-flash-desk…" style="color: transparent;">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

title: Preconnected origins

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
/appboy/communication/assets/image_assets/images/69dd83e2...	14400.0 s	1.6 MiB
cdn.quadpay.com/v1/quadpay.js	3600.0 s	202.0 KiB
connect.facebook.net/en_US/fbevents.js	1200.0 s	96.6 KiB
/appboy/communication/assets/font_assets/files/640b79dd13...	14400.0 s	92.5 KiB
/signals/config/332253387150322?v=2.9.303&r=stable&domain...	1200.0 s	44.9 KiB
/appboy/communication/assets/font_assets/files/62d01145ac...	14400.0 s	34.3 KiB
u-web-assets.mercdn.net/sdk/adyen/adyen.encrypt.nodom.min.js	3600.0 s	17.2 KiB
/notice?domain=mercari.com&c=teconsent&js=nj&noticeType=b...	3600.0 s	13.4 KiB
www.mercari.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?	14400.0 s	12.1 KiB
/assets/img/banners/section_header_hellogoodbye.png?heigh...	3600.0 s	9.0 KiB
appleid.cdn-apple.com/appleauth/static/jsapi/appleid/1/en_US/appleid.auth.js	86400.0 s	17.4 KiB
consent.trustarc.com/autoblockasset/core.min.js?domain=mercari.com	3600.0 s	6.6 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...	86400.0 s	10.7 KiB
consent.trustarc.com/autoblockoptout?domain=mercari.com	3600.0 s	2.0 KiB
use.fontawesome.com/7f85a56ba4.css	1800.0 s	866 B
www.gstatic.com/recaptcha/api2/logo_48.png	604800.0 s	2.3 KiB
/tr/?id=332253387150322&ev=PageView&dl=https%3A%2F%2Fwww....	0.0 ms	19 B

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
div.bz-sctn > div#i6jwb > div#ijviu > img#iq5gr `div.bz-sctn > div#i6jwb > div#ijviu > img#iq5gr`	/appboy/communication/assets/image_assets/images/69dd83e2...	1.6 MiB	1.6 MiB
downloadtheapp `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/downloadtheapp.png	143.6 KiB	126.3 KiB
athleticapparel `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/athleticapparel.png	139.9 KiB	123.1 KiB
tradingcards `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/tradingcards.png	135.0 KiB	118.8 KiB
Live now! April 22 - April 24 flash sale event! Coupon for 10% off item price(s… `div.Container-sc-beaovl > div.Banner__AnonWrapper-sc-c8222229-0 > a.Link__StyledAnchor-sc-3b50994f-0 > img.CDNImage__StyledNextImage-sc-2e57b269-0`	/assets/banner/anon-banner-april-flash-desktop.png?width=...	131.6 KiB	98.7 KiB
women `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/women.png	109.3 KiB	95.5 KiB
kids `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/kids.png	105.7 KiB	92.4 KiB
figurines `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/figurines.png	102.4 KiB	90.1 KiB
sneakers `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/sneakers.png	98.8 KiB	86.9 KiB
handbags `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/handbags.png	87.1 KiB	76.2 KiB
toys `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/toys.png	84.6 KiB	74.0 KiB
gaming `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/gaming.png	72.1 KiB	63.4 KiB
beauty `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/beauty.png	69.2 KiB	60.5 KiB
men `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/men.png	59.3 KiB	51.9 KiB
home `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/home.png	53.5 KiB	46.7 KiB
electronics `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/electronics.png	23.0 KiB	20.1 KiB
Retro 4 “Thunder” Black and Yellow US size 10.5 - Air Jordan `div.Thumb__StyledProductThumbWrapper-sc-166684af-1 > div.Flex-sc-92a9411d-0 > div.Product__CDNImageWrapper-sc-c3a991-1 > img.CDNImage__StyledNextImage-sc-2e57b269-0`	/photos/m32250349483_1.jpg?width=256&quality=75&_=1776896846	19.5 KiB	8.9 KiB
Women’s Lace-Up Wedges - TOMS `div.Thumb__StyledProductThumbWrapper-sc-166684af-1 > div.Flex-sc-92a9411d-0 > div.Product__CDNImageWrapper-sc-c3a991-1 > img.CDNImage__StyledNextImage-sc-2e57b269-0`	/photos/m94542569987_1.jpg?width=256&quality=75&_=1775046903	18.7 KiB	8.1 KiB
Say hello to your new favorite thing. `div > div.Container-sc-beaovl > div.Container-sc-beaovl > img.SectionHeader__ImageDesktop-sc-31242309-1`	/assets/img/banners/section_header_hellogoodbye.png?heigh...	8.5 KiB	6.4 KiB

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
u-web-assets.mercdn.net/assets/styles/dist/styles.min.css	2.8 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 205 ms

URL	Time Spent
mercari.com/	205 ms
www.mercari.com/	0.0 ms

Why this matters

Performance issues directly impact user engagement and conversion rates.

Element	Layout shift score
Get the app. Sell or buy. Almost anything. `body.ab-pause-scrolling > div#__next > div > div#getTheAppFooter`	0.187
Get the app. Sell or buy. Almost anything. `body.ab-pause-scrolling > div#__next > div > div#getTheAppFooter`	0.095
Privacy settings We use cookies to improve site experience, advertising, and ot… `body.ab-pause-scrolling > div#consent_blackbar > div#truste-consent-track`	0.000
Customize Got it `div#consent_blackbar > div#truste-consent-track > div#truste-consent-content > div#truste-consent-buttons`	0.000

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more ▾

Source: Google web.dev / Lighthouse

Estimated savings: 770 ms 1.5 MiB

URL	Transfer Size	Est Savings
/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae...	649.4 KiB	288.8 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	361.8 KiB	177.0 KiB
cdn.quadpay.com/v1/quadpay.js	201.6 KiB	130.6 KiB
www.googletagmanager.com/gtm.js?id=GTM-MSDTXHX	166.9 KiB	109.3 KiB
www.mercari.com/ko40/gtd?id=AW-dynamic_home&cx=c&gtm=4e64k1	139.6 KiB	84.2 KiB
www.mercari.com/ko40/?id=G-DJ5N7E6D07&cx=c&gtm=4e64k1	177.1 KiB	73.1 KiB
www.mercari.com/ko40/	175.1 KiB	71.2 KiB
accounts.google.com/gsi/client	95.5 KiB	68.2 KiB
www.mercari.com/ko40/?id=DC-13580167&cx=c&gtm=4e64k1	136.3 KiB	66.1 KiB
www.mercari.com/ko40/?id=DC-13949580&cx=c&gtm=4e64k1	135.4 KiB	65.9 KiB
www.mercari.com/ko40/?id=DC-9344415&cx=c&gtm=4e64k1	134.9 KiB	65.4 KiB
www.mercari.com/ko40/gtd?id=AW-828932699&cx=c&gtm=4e64k1	142.8 KiB	64.3 KiB
www.mercari.com/ko40/?id=AW-782098151&cx=c&gtm=4e64k1	149.5 KiB	61.6 KiB
www.mercari.com/ko40/?id=AW-880627815&cx=c&gtm=4e64k1	149.5 KiB	61.2 KiB
connect.facebook.net/en_US/fbevents.js	96.5 KiB	34.0 KiB
/builds/r-v1.26.1585/_next/static/chunks/92924.1fd2d1cdd3...	60.4 KiB	25.5 KiB
consent.trustarc.com/asset/notice.js/v/v1.7-1729	36.0 KiB	22.1 KiB
/builds/r-v1.26.1585/_next/static/chunks/main-8a62d0182b0...	41.3 KiB	21.3 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae...	1.6 s	1.1 s	70 ms
/builds/r-v1.26.1585/_next/static/chunks/framework-410df7...	1.6 s	1.4 s	4.5 ms
Unattributable	995 ms	77 ms	0.0 ms
www.mercari.com/	321 ms	11 ms	1.3 ms
cdn.quadpay.com/v1/quadpay.js	233 ms	148 ms	22 ms
www.mercari.com/ko40/	187 ms	150 ms	18 ms
/builds/r-v1.26.1585/_next/static/chunks/92924.1fd2d1cdd3...	166 ms	51 ms	7.8 ms
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	111 ms	62 ms	41 ms
/builds/r-v1.26.1585/_next/static/chunks/2944.e4fc4314fde...	109 ms	90 ms	0.3 ms
www.mercari.com/ko40/?id=G-DJ5N7E6D07&cx=c&gtm=4e64k1	108 ms	89 ms	15 ms
/builds/r-v1.26.1585/_next/static/chunks/35407.b1a7ae4368...	98 ms	71 ms	0.3 ms
www.mercari.com/ko40/?id=AW-880627815&cx=c&gtm=4e64k1	96 ms	83 ms	12 ms
www.mercari.com/ko40/?id=AW-782098151&cx=c&gtm=4e64k1	94 ms	80 ms	12 ms
www.mercari.com/cdn-cgi/challenge-platform/scripts/jsd/main.js	87 ms	83 ms	0.7 ms
www.mercari.com/ko40/gtd?id=AW-828932699&cx=c&gtm=4e64k1	84 ms	73 ms	9.6 ms
www.mercari.com/ko40/?id=DC-9344415&cx=c&gtm=4e64k1	67 ms	56 ms	11 ms
www.mercari.com/ko40/?id=DC-13580167&cx=c&gtm=4e64k1	63 ms	52 ms	11 ms
/signals/config/332253387150322?v=2.9.303&r=stable&domain...	63 ms	55 ms	7.1 ms
www.mercari.com/ko40/?id=DC-13949580&cx=c&gtm=4e64k1	59 ms	48 ms	10 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	4.2 s
Other	1.5 s
Style & Layout	345 ms
Script Parsing & Compilation	323 ms
Garbage Collection	187 ms
Rendering	70 ms
Parse HTML & CSS	33 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reason	Failure type
The page has an unload handler in the main frame.	Actionable

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
/appboy/communication/assets/image_assets/images/69dd83e2...	1.6 MiB
/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae...	650.1 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	362.4 KiB
www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	361.9 KiB
cdn.quadpay.com/v1/quadpay.js	202.0 KiB
www.mercari.com/ko40/?id=G-DJ5N7E6D07&cx=c&gtm=4e64k1	177.1 KiB
www.mercari.com/ko40/	175.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-MSDTXHX	167.3 KiB
www.mercari.com/ko40/?id=AW-880627815&cx=c&gtm=4e64k1	149.6 KiB
www.mercari.com/ko40/?id=AW-782098151&cx=c&gtm=4e64k1	149.6 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
athleticapparel `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/athleticapparel.png
sneakers `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/sneakers.png
downloadtheapp `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/downloadtheapp.png
women `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/women.png
men `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/men.png
kids `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/kids.png
home `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/home.png
figurines `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/figurines.png
tradingcards `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/tradingcards.png
gaming `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/gaming.png
electronics `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/electronics.png
toys `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/toys.png
beauty `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/beauty.png
handbags `div.Grid-sc-1avr99g > div.GridCol-sc-1revx1o > a.Link-sc-zv2dmn > img.AnonCards__CardImage-sc-1b3efe2a-1`	u-web-assets.mercdn.net/assets/anonHomeCards/desktop/handbags.png
mercari-lock-icon `div#truste-consent-content > div#truste-banner-header > div#truste-consent-icon > img`	consent.trustarc.com/get?name=mercari-lock-icon-dark-gray.svg
Women `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/1.svg
Men `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/2.svg
Electronics `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/7.svg
Toys `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/1611.svg
Gaming `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/84.svg
Handbags `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/21.svg
Home `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/4.svg
Vintage `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/5.svg
Beauty `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/6.svg
Kids `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/3.svg
Sports `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/8.svg
Handmade `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/9.svg
Office `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/2882.svg
Pet `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/143.svg
Outdoor `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/2633.svg
Tools `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/3170.svg
Books `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/141.svg
View all `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/meganavCategoryIcon/0.svg
American Express Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/american-express.svg
Visa Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/visa.svg
Paypal Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/paypal.svg
MasterCard Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/mastercard.svg
Discover Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/discover.svg
Zip Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/zip.svg
Paypal Pay in 4 Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/paypal-pay-in-4.svg
Apple Pay Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/apple-pay.svg
Venmo Logo `ul.UnstyledList-sc-1hlucv7 > li > a.Link-sc-zv2dmn > img.ResponsiveLogo-sc-1n6eohs`	u-web-assets.mercdn.net/assets/footer/payment-methods/venmo.svg
div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1 `div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`	u-web-assets.mercdn.net/assets/icons/icn-discount-arrow.svg

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●User Timing marks and measures 29 user timings

●Avoid long main-thread tasks 20 long tasks found

●Network Requests

●Network Round Trip Times 70 ms

●Server Backend Latencies 4,130 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 70 ms

○INP breakdown

○Avoid non-composited animations

Accessibility

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.common__Wrapper-sc-cfda3767-0 > div > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1 `div.common__Wrapper-sc-cfda3767-0 > div > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1`
div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1 `div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1`
div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1 `div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1`
div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1 `div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1`
div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1 `div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1`
div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1 `div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1`
div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1 `div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1`
div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1 `div.common__Wrapper-sc-cfda3767-0 > div.BodyContainer__ResponsiveContainer-sc-15b083c9-1 > div.Container-sc-beaovl > button.Button__StrippedButton-sc-9d0aeee1-1`

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.common__Wrapper-sc-cfda3767-0 > div.Flex-sc-92a9411d-0 > div.CuratedList__ArrowWrapper-sc-d27ad230-7 > img.Image-sc-a4ad9978-1 `div.common__Wrapper-sc-cfda3767-0 > div.Flex-sc-92a9411d-0 > div.CuratedList__ArrowWrapper-sc-d27ad230-7 > img.Image-sc-a4ad9978-1`
div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1 `div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Navigation

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Women `div.Container-sc-beaovl > a.Link__StyledAnchor-sc-3b50994f-0 > div.Container-sc-beaovl > h6.H7-sc-1e92cdr`
Apple `div.Container-sc-beaovl > div.Flex__Box-sc-92a9411d-1 > a.Link__StyledAnchor-sc-3b50994f-0 > h5.H5-sc-dphgz5`

These are opportunities to improve keyboard navigation in your application.

Best practices

Disabling zooming is problematic for users with low vision who rely on screen magnification to properly see the contents of a web page. Learn more about the viewport meta tag.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
head > meta `head > meta`

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Form elements have associated labels

●`button`, `link`, and `menuitem` elements have accessible names

●ARIA attributes are used as specified for the element's role

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<frame>` or `<iframe>` elements have a title

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links are distinguishable without relying on color.

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●Touch targets have sufficient size and spacing.

●`[lang]` attributes have a valid value

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Image elements do not have `[alt]` attributes that are redundant text.

●Identical links have the same purpose.

●Elements with visible text labels have matching accessible names.

○`[accesskey]` values are unique

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

Best Practices

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / Warning	Source
SharedStorage	www.mercari.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	www.mercari.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	www.mercari.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
Unload event listeners are deprecated and will be removed.	/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae... line 1317, col 12527
AttributionReporting	consent.trustarc.com/autoblockasset/core.min.js?domain=mercari.com line 4, col 17791

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

Source	Description
/builds/r-v1.26.1585/_next/static/chunks/pages/_app-951ae... line 1317, col 7386	`[GSI_LOGGER]: FedCM get() rejects with NetworkError: Error retrieving a token.`
www.mercari.com/	`Not signed in with the identity provider.`

Why this matters

Performance issues directly impact user engagement and conversion rates.

●Uses HTTPS

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

SEO

Crawling and Indexing

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
Do not sell or share my personal info `div#truste-consent-track > div#truste-consent-content > div.donotsell > a`

To appear in search results, crawlers need access to your app.

Content Best Practices

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.common__Wrapper-sc-cfda3767-0 > div.Flex-sc-92a9411d-0 > div.CuratedList__ArrowWrapper-sc-d27ad230-7 > img.Image-sc-a4ad9978-1 `div.common__Wrapper-sc-cfda3767-0 > div.Flex-sc-92a9411d-0 > div.CuratedList__ArrowWrapper-sc-d27ad230-7 > img.Image-sc-a4ad9978-1`
div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1 `div.Flex-sc-92a9411d-0 > span.RectangleLabel-sc-cwvp98 > div.Container-sc-beaovl > img.Image-sc-a4ad9978-1`

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●robots.txt is valid

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`

Results for https://mercari.com

Site Health

How you compare

Top Priorities (5)

Fix Priority Matrix

Quick Wins

Strategic

Easy Improvements

Deprioritize

What fixing these means

Conversion Barriers

Speed (2)

Trust (2)

Usability (1)

Content (3)

Navigation (1)

Return on Investment

Investment

Monthly returns

Regulatory risk avoided

Estimated Remediation Cost

Cost by category

Cost by effort level

What Inaction Is Costing You

Compliance Risk

Bandwidth Waste

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Navigation

Names and labels

Best practices

Best Practices

General

SEO

Crawling and Indexing

Content Best Practices

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Names and labels

Navigation

Best practices

Best Practices

General

SEO

Crawling and Indexing

Content Best Practices

Keyboard Shortcuts