C — https://stackexchange.com

Site Health

Score: 77 / 100

Based on 8 categories, 0 sections

Fast site — your users get a smooth experience.

Good foundation, but a few gaps could be exploited.

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.

Lean and efficient — low environmental impact per visit.

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

AngularJS · 251 peers

You 77

Avg 73

At average

0 50 100

Better than 82% of AngularJS sites See full AngularJS benchmark →

Cloudflare Bot Management · 302 peers

You 77

Avg 74

At average

0 50 100

Better than 76% of Cloudflare Bot Management sites See full Cloudflare Bot Management benchmark →

Top Priorities (5)

Cookie '__cflb' is missing the Secure flag

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

Security › Cookie Security

Cookie 'prov' is missing the Secure flag

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

Security › Cookie Security

72 third-party resources (89% of weight)

Performance issues directly impact user engagement and conversion rates.

Performance › Page Weight Inventory

Cookie '__cf_bm' has no SameSite attribute

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

Security › Cookie Security

Cookie 'prov' has no SameSite attribute

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

Security › Cookie Security

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%2Fstackexchange.com)](https://beavercheck.com/results/88ba3871-c7c1-4749-98c6-a34fbaf69605)

HTML

<a href="https://beavercheck.com/results/88ba3871-c7c1-4749-98c6-a34fbaf69605"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fstackexchange.com" alt="BeaverCheck Score"></a>

Image URL

https://beavercheck.com/badge?url=https%3A%2F%2Fstackexchange.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 5.1s exceeds Google's 2.5s 'Good' threshold and the 1 performance issue below directly contributes to it. Addressing the critical issues below would have the most immediate impact on your user trust.

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

Your LCP is 5.1s — fixing the 1 performance critical could bring it under Google's 2.5s 'Good' threshold.

Conversion Barriers

1 critical 6 warning

7 barrier(s) likely increasing bounce by ~27%.

Speed (1)

Page takes 5.1s to load

+12% bounce

Users abandon at ~3s — you're 2.6s over the 2.5s threshold

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

Trust (1)

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

Content (4)

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

Content is hard to read

+2% bounce

Graduate-level reading difficulty — limits the addressable audience for product or blog pages

Fix: Shorten sentences; replace jargon with plain language; target Flesch ease ≥60

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

$400 investment → $3,099/month returns + USD 150,000 risk avoided

Payback period: < 1 month First-year ROI: +9197%

Investment

$400

4h · 5 findings

Monthly returns

$3,099 /mo

~$37,190 / year

Conversions recovered $3,099
Bandwidth savings $0.08

Regulatory risk avoided

USD 150,000

if kept compliant

ADA Title III USD 150,000

Payback period

0 12mo 24mo

$200 — 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

$400

4.0 developer hours at $100/hr

Based on United States rates ($100/hr)

Quick wins

$200 4 fixes in ~120 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

$12,500 / month at risk

~$150,001 / 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

$0.08 /mo

1044.2 MB/mo × 0.080 USD/GB

Optimize transfer: save ~104 KB per page load
Saves $0.08/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 2 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

Was this report useful?

Thanks for your feedback!

We'll use a cached audit if available, or offer to scan.

Checking for existing audit...

Press ? for shortcuts

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.

2.58 s

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

5.14 s

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

121 ms

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

0.000

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

4.86 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.

5.26 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
stackoverflow.com/Content/shared/chrome/chrome.css?v=764504b195d8	604800.0 s	98.9 KiB
/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/...	14400.0 s	12.0 KiB
/avatar/10128c971dfa3ca3d89f471b693c9d72?s=36&d=identicon...	300.0 s	2.6 KiB
/avatar/f12a0330c5264e0c0872cf83898e0059?s=36&d=identicon...	300.0 s	2.4 KiB
/avatar/efdd0371ee7b983ab3b858ea92653aeb?s=36&d=identicon...	300.0 s	2.4 KiB
/avatar/9d36c6c0fe72160847d8aff404d9f1a0?s=36&d=identicon...	300.0 s	2.3 KiB
/avatar/96f5e5d858f1562ac8075c2664451b3b?s=36&d=identicon...	300.0 s	2.1 KiB
/avatar/d764dae6d3b6b39bc8ff40e28367d78a?s=36&d=identicon...	300.0 s	2.1 KiB
/avatar/8bfaa20f8775b87a2c0a6d9f4193ecbb?s=36&d=identicon...	300.0 s	2.0 KiB
/avatar/ab85c6b652a16b8135438e80cf480c48?s=36&d=identicon...	300.0 s	2.0 KiB
/avatar/df1d710f79509457b8603d60608772c8?s=36&d=identicon...	300.0 s	1.9 KiB
/avatar/168f7b509dd534671cb52c7ff58a6cf6?s=36&d=identicon...	300.0 s	1.7 KiB
/avatar/2a2941970f141aad669d13375dc57c4f?s=36&d=identicon...	300.0 s	1.6 KiB
cdn.sstatic.net/stackexchange/all.css?v=db31a2669ca3	604800.0 s	15.1 KiB
/avatar/e3887f18263b27e21575a5912b39a006?s=36&d=identicon...	300.0 s	1.6 KiB
/avatar/e301b767390b98cb298cd04ee196ac58?s=36&d=identicon...	300.0 s	1.6 KiB
/avatar/03508d221da4d3ebb99c724e19370b55?s=36&d=identicon...	300.0 s	1.6 KiB
/avatar/31f2b9cfa1cd901e508101b38d1af8ff?s=36&d=identicon...	300.0 s	1.5 KiB
/avatar/e8458cd805d568cfbc85636614d9d098?s=36&d=identicon...	300.0 s	1.5 KiB
/avatar/58c3cb5e1dac8d62442514f34ab84a0e?s=36&d=identicon...	300.0 s	1.3 KiB
/avatar/456b30a6c93001f930a726ff05217518?s=36&d=identicon...	300.0 s	1.3 KiB
/avatar/29221d8b990c741f510ddddcb67ec47e?s=36&d=identicon...	300.0 s	1.2 KiB
cdn.sstatic.net/stackexchange/Js/topbar.js?v=b2367277c351	604800.0 s	11.4 KiB
cdn.sstatic.net/stackexchange/Js/master.js?v=ef8b6ed08310	604800.0 s	10.4 KiB
/a-/AOh14GiU9JJ1lMC8Ux8lye9FUkCF46ri4wL2hfMtMERbNA=k-s36	86400.0 s	1.2 KiB
cdn.sstatic.net/stackexchange/Img/se-logo.png?v=8f7dca5b94db	604800.0 s	4.6 KiB
puzzling.stackexchange.com/Content/Sites/puzzling/Img/icon-48.png	604800.0 s	4.0 KiB
stackexchange.com/Content/Img/hero/bubble.png	604800.0 s	3.4 KiB
stackexchange.com/Content/Img/hero/check.png	604800.0 s	2.9 KiB
mathoverflow.net/Content/Sites/mathoverflow/Img/icon-48.png	604800.0 s	2.9 KiB
electronics.stackexchange.com/Content/Sites/electronics/Img/icon-48.png	604800.0 s	2.4 KiB
mathematica.stackexchange.com/Content/Sites/mathematica/Img/icon-48.png	604800.0 s	2.3 KiB
worldbuilding.stackexchange.com/Content/Sites/worldbuilding/Img/icon-48.png	604800.0 s	2.0 KiB
askubuntu.com/Content/Sites/askubuntu/Img/favicon.ico	604800.0 s	2.0 KiB
cdn.sstatic.net/stackexchange/Js/universal-login.js?v=30968200101f	604800.0 s	2.0 KiB
crafts.stackexchange.com/Content/Sites/crafts/Img/icon-48.png	604800.0 s	1.9 KiB
math.stackexchange.com/Content/Sites/math/Img/favicon.ico	604800.0 s	1.9 KiB
space.stackexchange.com/Content/Sites/space/Img/icon-48.png	604800.0 s	1.7 KiB
matheducators.stackexchange.com/Content/Sites/matheducators/Img/icon-48.png	604800.0 s	1.5 KiB
politics.stackexchange.com/Content/Sites/politics/Img/icon-48.png	604800.0 s	1.5 KiB
electronics.stackexchange.com/Content/Sites/electronics/Img/favicon.ico	604800.0 s	1.5 KiB
unix.stackexchange.com/Content/Sites/unix/Img/favicon.ico	604800.0 s	1.5 KiB
law.stackexchange.com/Content/Sites/law/Img/icon-48.png	604800.0 s	1.4 KiB
tex.stackexchange.com/Content/Sites/tex/Img/icon-48.png	604800.0 s	1.3 KiB
english.stackexchange.com/Content/Sites/english/Img/favicon.ico	604800.0 s	1.3 KiB
scifi.stackexchange.com/Content/Sites/scifi/Img/icon-48.png	604800.0 s	1.3 KiB
superuser.com/Content/Sites/superuser/Img/favicon.ico	604800.0 s	1.3 KiB
lh3.googleusercontent.com/a/ALm5wu2ZKm-HZQlbttbBrwGc1C9gtZ7Ij-K1hAqD9WhN=k-s36	86400.0 s	334 B
stackoverflow.com/Content/Sites/stackoverflow/Img/favicon.ico	604800.0 s	1.3 KiB
ru.stackoverflow.com/Content/Sites/ru/Img/favicon.ico	604800.0 s	1.2 KiB
superuser.com/Content/Sites/superuser/Img/icon-48.png	604800.0 s	1.2 KiB
serverfault.com/Content/Sites/serverfault/Img/favicon.ico	604800.0 s	1.1 KiB
stackexchange.com/Content/Img/hero/vote.png	604800.0 s	1.1 KiB
math.stackexchange.com/Content/Sites/math/Img/icon-48.png	604800.0 s	1.0 KiB
philosophy.stackexchange.com/Content/Sites/philosophy/Img/icon-48.png	604800.0 s	954 B
rpg.stackexchange.com/Content/Sites/rpg/Img/icon-48.png	604800.0 s	887 B
physics.stackexchange.com/Content/Sites/physics/Img/icon-48.png	604800.0 s	876 B
stackoverflow.com/Content/Sites/stackoverflow/Img/icon-48.png	604800.0 s	864 B
pm.stackexchange.com/Content/Sites/pm/Img/apple-touch-icon.png	604800.0 s	810 B
academia.stackexchange.com/Content/Sites/academia/Img/icon-48.png	604800.0 s	774 B
english.stackexchange.com/Content/Sites/english/Img/icon-48.png	604800.0 s	556 B
history.stackexchange.com/Content/Sites/history/Img/icon-48.png	604800.0 s	555 B
meta.stackexchange.com/Content/Sites/stackexchangemeta/Img/favicon.ico	604800.0 s	550 B
crypto.stackexchange.com/Content/Sites/crypto/Img/icon-48.png	604800.0 s	397 B
stackexchange.com/Content/Img/hero/close.png	604800.0 s	384 B

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

value: no origins were preconnected

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

value: No additional origins are good candidates for preconnecting

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
cdn.sstatic.net/stackexchange/Js/master.js?v=ef8b6ed08310	10.4 KiB	150 ms
cdn.sstatic.net/stackexchange/all.css?v=db31a2669ca3	15.1 KiB	1.0 s
cdn.sstatic.net/stackexchange/Js/topbar.js?v=b2367277c351	11.4 KiB	150 ms
cdn.sstatic.net/stackexchange/Js/universal-login.js?v=30968200101f	2.0 KiB
ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js	30.4 KiB	1.2 s
stackoverflow.com/Content/shared/chrome/chrome.css?v=764504b195d8	98.9 KiB	1.7 s

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
Italian Philosopher `div.module > div.userDetails > a > img.bar-sm`	i.sstatic.net/xajrG.png?s=64	4.8 KiB	4.3 KiB

Tap interactions may be delayed by up to 300 ms if the viewport is not optimized for mobile.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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.

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

Diagnostics

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 10.5 KiB

URL	Transfer Size	Est Savings
cdn.sstatic.net/stackexchange/Js/topbar.js?v=b2367277c351	11.0 KiB	5.3 KiB
cdn.sstatic.net/stackexchange/Js/master.js?v=ef8b6ed08310	9.9 KiB	5.2 KiB

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 560 ms 105.1 KiB

URL	Transfer Size	Est Savings
stackoverflow.com/Content/shared/chrome/chrome.css?v=764504b195d8	98.1 KiB	92.7 KiB
cdn.sstatic.net/stackexchange/all.css?v=db31a2669ca3	14.5 KiB	12.4 KiB

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: 300 ms 20.4 KiB

URL	Transfer Size	Est Savings
ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js	29.8 KiB	20.4 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
Voting arrows `div.row > div > div.column > img`	stackexchange.com/Content/Img/hero/vote.png
Speech bubbles `div.row > div > div.column > img`	stackexchange.com/Content/Img/hero/bubble.png
checkmark `div.row > div > div.column > img`	stackexchange.com/Content/Img/hero/check.png
close `div.hero-box > div.close > a > img`	stackexchange.com/Content/Img/hero/close.png

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

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Minify CSS

●Avoids enormous network payloads Total size was 340 KiB

●JavaScript execution time 0.6 s

●Minimizes main-thread work 1.8 s

●Avoid long main-thread tasks 7 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 130 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 140 ms

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○Avoid non-composited animations

○Avoid large layout shifts

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.

ARIA

Some ARIA roles have required attributes that describe the state of the element to screen readers. Learn more about roles and required attributes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Search `div.s-topbar--container > form#search > div.s-topbar--searchbar--input-group > input.s-input`

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
hot `div#mainArea > div.subheader > div.tabs > a.youarehere`
4 answers \| asked 10 hours ago by vsz on scifi `div.question-container > div.question > div.metaInfo > span.va-middle`
by vsz on `div.question > div.metaInfo > span.va-middle > span.owner`
4 answers \| asked 13 hours ago by Erwann on tex `div.question-container > div.question > div.metaInfo > span.va-middle`
by Erwann on `div.question > div.metaInfo > span.va-middle > span.owner`
4 answers \| asked 18 hours ago by pie on matheducators `div.question-container > div.question > div.metaInfo > span.va-middle`
by pie on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 22 hours ago by Rafał Mach on mathoverflow `div.question-container > div.question > div.metaInfo > span.va-middle`
by Rafał Mach on `div.question > div.metaInfo > span.va-middle > span.owner`
1 answers \| asked 9 hours ago by RidiculousRichard on space `div.question-container > div.question > div.metaInfo > span.va-middle`
by RidiculousRichard on `div.question > div.metaInfo > span.va-middle > span.owner`
1 answers \| asked 17 hours ago by honestSalami on history `div.question-container > div.question > div.metaInfo > span.va-middle`
by honestSalami on `div.question > div.metaInfo > span.va-middle > span.owner`
3 answers \| asked 20 hours ago by Sebastiano on tex `div.question-container > div.question > div.metaInfo > span.va-middle`
by Sebastiano on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by Mike on rpg `div.question-container > div.question > div.metaInfo > span.va-middle`
by Mike on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by Italian Philosopher on politics `div.question-container > div.question > div.metaInfo > span.va-middle`
by Italian Philosopher on `div.question > div.metaInfo > span.va-middle > span.owner`
3 answers \| asked 14 hours ago by Rio C on puzzling `div.question-container > div.question > div.metaInfo > span.va-middle`
by Rio C on `div.question > div.metaInfo > span.va-middle > span.owner`
1 answers \| asked yesterday by Raj on scifi `div.question-container > div.question > div.metaInfo > span.va-middle`
by Raj on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 22 hours ago by karlh on tex `div.question-container > div.question > div.metaInfo > span.va-middle`
by karlh on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 21 hours ago by TomY on physics `div.question-container > div.question > div.metaInfo > span.va-middle`
by TomY on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 18 hours ago by Trevor on english `div.question-container > div.question > div.metaInfo > span.va-middle`
by Trevor on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 9 hours ago by Zachary Barbanell on crypto `div.question-container > div.question > div.metaInfo > span.va-middle`
by Zachary Barbanell on `div.question > div.metaInfo > span.va-middle > span.owner`
3 answers \| asked 22 hours ago by Alma Arjuna on math `div.question-container > div.question > div.metaInfo > span.va-middle`
by Alma Arjuna on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by Rajorshi Chattopadhyay on academia `div.question-container > div.question > div.metaInfo > span.va-middle`
by Rajorshi Chattopadhyay on `div.question > div.metaInfo > span.va-middle > span.owner`
1 answers \| asked 12 hours ago by robertspierre on superuser `div.question-container > div.question > div.metaInfo > span.va-middle`
by robertspierre on `div.question > div.metaInfo > span.va-middle > span.owner`
6 answers \| asked Apr 18 at 15:36 by Dmyt on worldbuilding `div.question-container > div.question > div.metaInfo > span.va-middle`
by Dmyt on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by Mike on rpg `div.question-container > div.question > div.metaInfo > span.va-middle`
by Mike on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by Jay Bee on space `div.question-container > div.question > div.metaInfo > span.va-middle`
by Jay Bee on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 18 hours ago by Student_Number_249812341 on physics `div.question-container > div.question > div.metaInfo > span.va-middle`
by Student_Number_249812341 on `div.question > div.metaInfo > span.va-middle > span.owner`
4 answers \| asked 2 days ago by qwerty on mathematica `div.question-container > div.question > div.metaInfo > span.va-middle`
by qwerty on `div.question > div.metaInfo > span.va-middle > span.owner`
7 answers \| asked 2 days ago by Alex on electronics `div.question-container > div.question > div.metaInfo > span.va-middle`
by Alex on `div.question > div.metaInfo > span.va-middle > span.owner`
1 answers \| asked 23 hours ago by Howard Hinnant on stackoverflow `div.question-container > div.question > div.metaInfo > span.va-middle`
by Howard Hinnant on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by dsollen on law `div.question-container > div.question > div.metaInfo > span.va-middle`
by dsollen on `div.question > div.metaInfo > span.va-middle > span.owner`
9 answers \| asked 2 days ago by Syed on philosophy `div.question-container > div.question > div.metaInfo > span.va-middle`
by Syed on `div.question > div.metaInfo > span.va-middle > span.owner`
4 answers \| asked 2 days ago by Rean on academia `div.question-container > div.question > div.metaInfo > span.va-middle`
by Rean on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 15 hours ago by Vincent on tex `div.question-container > div.question > div.metaInfo > span.va-middle`
by Vincent on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 20 hours ago by Joseph Rose on crafts `div.question-container > div.question > div.metaInfo > span.va-middle`
by Joseph Rose on `div.question > div.metaInfo > span.va-middle > span.owner`
per page `div#mainArea > div#question-list > div.page-sizer > span.page-numbers`
6.5k `div.featured-site > div.site-stats > div.stats-container > div.stats`
20k `div.featured-site > div.site-stats > div.stats-container > div.stats`
97% `div.featured-site > div.site-stats > div.stats-container > div.stats`
hot questions feed `section#content > div.contentWrapper > div#feed-link > a`
About `div.site-footer--col > ul.-list > li > a.js-gps-track`
Contact `div.site-footer--col > ul.-list > li > a.js-gps-track`
Feedback `div.site-footer--col > ul.-list > li > a.js-gps-track`
Stack Overflow `div.site-footer--col > ul.-list > li > a.js-gps-track`
Stack Internal `div.site-footer--col > ul.-list > li > a.js-gps-track`
Stack Data Licensing `div.site-footer--col > ul.-list > li > a.js-gps-track`
Stack Ads `div.site-footer--col > ul.-list > li > a.js-gps-track`
Press `div.site-footer--col > ul.-list > li > a.js-gps-track`
Legal `div.site-footer--col > ul.-list > li > a.js-gps-track`
Privacy Policy `div.site-footer--col > ul.-list > li > a.js-gps-track`
Terms of Service `div.site-footer--col > ul.-list > li > a.js-gps-track`
Cookie Settings `div.site-footer--col > ul.-list > li#consent-footer-link > button.s-btn`
Cookie Policy `div.site-footer--col > ul.-list > li > a.js-gps-track`
Technology `div > ul.-list > li > a.-link`
Culture & recreation `div > ul.-list > li > a.-link`
Life & arts `div > ul.-list > li > a.-link`
Science `div > ul.-list > li > a.-link`
Professional `div > ul.-list > li > a.-link`
Business `div > ul.-list > li > a.-link`
API `div > ul.-list > li.mt16 > a.-link`
Data `div > ul.-list > li > a.-link`
Blog `div.site-footer--copyright > ul.-list > li > a.js-gps-track`
Facebook `div.site-footer--copyright > ul.-list > li > a.-link`
Twitter `div.site-footer--copyright > ul.-list > li > a.-link`
LinkedIn `div.site-footer--copyright > ul.-list > li > a.-link`
Instagram `div.site-footer--copyright > ul.-list > li > a.-link`
Site design / logo © 2026 Stack Exchange Inc; `div.site-footer--container > div.site-footer--copyright > p.md:mb0 > span`
user contributions licensed under `div.site-footer--container > div.site-footer--copyright > p.md:mb0 > span`
CC BY-SA `div.site-footer--container > div.site-footer--copyright > p.md:mb0 > a.-link`
rev 2026.4.21.42306 `div.site-footer--container > div.site-footer--copyright > p.md:mb0 > span#svnrev`

These are opportunities to improve the legibility of your content.

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
Stack Exchange Q&A communities are different. Here's how: `div.hero-box > div.row > div.text > h3.title`
STACK EXCHANGE `div.site-footer--container > nav.site-footer--nav > div.site-footer--col > h5.-title`

These are opportunities to improve keyboard navigation in your application.

Names and labels

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.wrapper > header.s-topbar > div.s-topbar--container > a.s-topbar--logo `div.wrapper > header.s-topbar > div.s-topbar--container > a.s-topbar--logo`

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.

Tables and lists

Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Tour `header.s-topbar > div.s-topbar--container > ol.s-navigation > li`
About Us `header.s-topbar > div.s-topbar--container > ol.s-navigation > li`
Meta `header.s-topbar > div.s-topbar--container > ol.s-navigation > li`

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Best practices

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]` values are valid

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

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

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●Form elements have associated labels

●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

●Document has a `<title>` element

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

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

●Links are distinguishable without relying on color.

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

●Touch targets have sufficient size and spacing.

●Skip links are focusable.

●Deprecated ARIA roles were not used

●Uses ARIA roles only on compatible elements

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

●Identical links have the same purpose.

○`[accesskey]` values are unique

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

○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

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

○`<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">`

○`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

○`<object>` elements have alternate text

○Select elements have associated label elements.

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

○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.

○`[lang]` attributes have a valid value

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

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

○All heading elements contain content.

○Elements with visible text labels have matching accessible names.

○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

User Experience

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Displayed size	Actual size	Expected size
Voting arrows `div.row > div > div.column > img`	stackexchange.com/Content/Img/hero/vote.png	141 x 86	141 x 86	212 x 129
Speech bubbles `div.row > div > div.column > img`	stackexchange.com/Content/Img/hero/bubble.png	107 x 86	107 x 86	161 x 129
checkmark `div.row > div > div.column > img`	stackexchange.com/Content/Img/hero/check.png	90 x 86	90 x 86	135 x 129
Dmyt `div.module > div.userDetails > a > img.bar-sm`	/avatar/03508d221da4d3ebb99c724e19370b55?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Rean `div.module > div.userDetails > a > img.bar-sm`	/avatar/10128c971dfa3ca3d89f471b693c9d72?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Sebastiano `div.module > div.userDetails > a > img.bar-sm`	/avatar/168f7b509dd534671cb52c7ff58a6cf6?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Rio C `div.module > div.userDetails > a > img.bar-sm`	/avatar/29221d8b990c741f510ddddcb67ec47e?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Howard Hinnant `div.module > div.userDetails > a > img.bar-sm`	/avatar/2a2941970f141aad669d13375dc57c4f?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Alex `div.module > div.userDetails > a > img.bar-sm`	/avatar/31f2b9cfa1cd901e508101b38d1af8ff?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Rajorshi Chattopadhyay `div.module > div.userDetails > a > img.bar-sm`	/avatar/456b30a6c93001f930a726ff05217518?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Alma Arjuna `div.module > div.userDetails > a > img.bar-sm`	/avatar/58c3cb5e1dac8d62442514f34ab84a0e?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Zachary Barbanell `div.module > div.userDetails > a > img.bar-sm`	/avatar/8bfaa20f8775b87a2c0a6d9f4193ecbb?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
vsz `div.module > div.userDetails > a > img.bar-sm`	/avatar/96f5e5d858f1562ac8075c2664451b3b?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
qwerty `div.module > div.userDetails > a > img.bar-sm`	/avatar/9d36c6c0fe72160847d8aff404d9f1a0?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Vincent `div.module > div.userDetails > a > img.bar-sm`	/avatar/ab85c6b652a16b8135438e80cf480c48?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
robertspierre `div.module > div.userDetails > a > img.bar-sm`	/avatar/d764dae6d3b6b39bc8ff40e28367d78a?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Mike `div.module > div.userDetails > a > img.bar-sm`	/avatar/df1d710f79509457b8603d60608772c8?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
TomY `div.module > div.userDetails > a > img.bar-sm`	/avatar/e301b767390b98cb298cd04ee196ac58?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Erwann `div.module > div.userDetails > a > img.bar-sm`	/avatar/e3887f18263b27e21575a5912b39a006?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Raj `div.module > div.userDetails > a > img.bar-sm`	/avatar/e8458cd805d568cfbc85636614d9d098?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
dsollen `div.module > div.userDetails > a > img.bar-sm`	/avatar/efdd0371ee7b983ab3b858ea92653aeb?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Syed `div.module > div.userDetails > a > img.bar-sm`	/avatar/f12a0330c5264e0c0872cf83898e0059?s=36&d=identicon...	30 x 30	30 x 30	45 x 45
Jay Bee `div.module > div.userDetails > a > img.bar-sm`	/a-/AOh14GiU9JJ1lMC8Ux8lye9FUkCF46ri4wL2hfMtMERbNA=k-s36	30 x 30	36 x 36	45 x 45
Trevor `div.module > div.userDetails > a > img.bar-sm`	lh3.googleusercontent.com/a/ALm5wu2ZKm-HZQlbttbBrwGc1C9gtZ7Ij-K1hAqD9WhN=k-s36	30 x 30	36 x 36	45 x 45
close `div.hero-box > div.close > a > img`	stackexchange.com/Content/Img/hero/close.png	11 x 11	11 x 11	17 x 17

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	stackexchange.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	stackexchange.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	stackexchange.com/cdn-cgi/challenge-platform/scripts/jsd/main.js

●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

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●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

●Page has valid source maps

○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.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destination	Link Text
stackexchange.com/tour	Learn more

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 are crawlable

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

○robots.txt is valid

○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.

660 ms

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

937 ms

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

4 ms

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

0.000

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

826 ms

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

1.15 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.

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

value: no origins were preconnected

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

value: No additional origins are good candidates for preconnecting

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
cdn.sstatic.net/stackexchange/Js/topbar.js?v=b2367277c351	11.4 KiB
cdn.sstatic.net/stackexchange/Js/master.js?v=ef8b6ed08310	10.4 KiB
cdn.sstatic.net/stackexchange/all.css?v=db31a2669ca3	15.0 KiB	372 ms
cdn.sstatic.net/stackexchange/Js/universal-login.js?v=30968200101f	2.0 KiB
stackoverflow.com/Content/shared/chrome/chrome.css?v=764504b195d8	98.9 KiB	390 ms
ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js	30.4 KiB	273 ms

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
stackoverflow.com/Content/shared/chrome/chrome.css?v=764504b195d8	604800.0 s	98.9 KiB
/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/...	14400.0 s	11.5 KiB
/avatar/10128c971dfa3ca3d89f471b693c9d72?s=36&d=identicon...	300.0 s	2.6 KiB
/avatar/f12a0330c5264e0c0872cf83898e0059?s=36&d=identicon...	300.0 s	2.4 KiB
/avatar/efdd0371ee7b983ab3b858ea92653aeb?s=36&d=identicon...	300.0 s	2.4 KiB
/avatar/9d36c6c0fe72160847d8aff404d9f1a0?s=36&d=identicon...	300.0 s	2.3 KiB
/avatar/96f5e5d858f1562ac8075c2664451b3b?s=36&d=identicon...	300.0 s	2.1 KiB
/avatar/d764dae6d3b6b39bc8ff40e28367d78a?s=36&d=identicon...	300.0 s	2.1 KiB
/avatar/8bfaa20f8775b87a2c0a6d9f4193ecbb?s=36&d=identicon...	300.0 s	2.0 KiB
/avatar/ab85c6b652a16b8135438e80cf480c48?s=36&d=identicon...	300.0 s	2.0 KiB
/avatar/df1d710f79509457b8603d60608772c8?s=36&d=identicon...	300.0 s	1.9 KiB
/avatar/168f7b509dd534671cb52c7ff58a6cf6?s=36&d=identicon...	300.0 s	1.7 KiB
/avatar/2a2941970f141aad669d13375dc57c4f?s=36&d=identicon...	300.0 s	1.6 KiB
/avatar/e3887f18263b27e21575a5912b39a006?s=36&d=identicon...	300.0 s	1.6 KiB
cdn.sstatic.net/stackexchange/all.css?v=db31a2669ca3	604800.0 s	15.0 KiB
/avatar/e301b767390b98cb298cd04ee196ac58?s=36&d=identicon...	300.0 s	1.6 KiB
/avatar/03508d221da4d3ebb99c724e19370b55?s=36&d=identicon...	300.0 s	1.6 KiB
/avatar/31f2b9cfa1cd901e508101b38d1af8ff?s=36&d=identicon...	300.0 s	1.5 KiB
/avatar/e8458cd805d568cfbc85636614d9d098?s=36&d=identicon...	300.0 s	1.5 KiB
/avatar/58c3cb5e1dac8d62442514f34ab84a0e?s=36&d=identicon...	300.0 s	1.3 KiB
/avatar/456b30a6c93001f930a726ff05217518?s=36&d=identicon...	300.0 s	1.3 KiB
/avatar/29221d8b990c741f510ddddcb67ec47e?s=36&d=identicon...	300.0 s	1.2 KiB
cdn.sstatic.net/stackexchange/Js/topbar.js?v=b2367277c351	604800.0 s	11.4 KiB
cdn.sstatic.net/stackexchange/Js/master.js?v=ef8b6ed08310	604800.0 s	10.4 KiB
cdn.sstatic.net/stackexchange/Img/se-logo.png?v=8f7dca5b94db	604800.0 s	4.7 KiB
/a-/AOh14GiU9JJ1lMC8Ux8lye9FUkCF46ri4wL2hfMtMERbNA=k-s36	86400.0 s	1.2 KiB
puzzling.stackexchange.com/Content/Sites/puzzling/Img/icon-48.png	604800.0 s	4.0 KiB
stackexchange.com/Content/Img/hero/bubble.png	604800.0 s	3.3 KiB
stackexchange.com/Content/Img/hero/check.png	604800.0 s	2.9 KiB
mathoverflow.net/Content/Sites/mathoverflow/Img/icon-48.png	604800.0 s	2.9 KiB
mathematica.stackexchange.com/Content/Sites/mathematica/Img/icon-48.png	604800.0 s	2.3 KiB
electronics.stackexchange.com/Content/Sites/electronics/Img/icon-48.png	604800.0 s	2.3 KiB
worldbuilding.stackexchange.com/Content/Sites/worldbuilding/Img/icon-48.png	604800.0 s	2.0 KiB
cdn.sstatic.net/stackexchange/Js/universal-login.js?v=30968200101f	604800.0 s	2.0 KiB
askubuntu.com/Content/Sites/askubuntu/Img/favicon.ico	604800.0 s	2.0 KiB
crafts.stackexchange.com/Content/Sites/crafts/Img/icon-48.png	604800.0 s	1.9 KiB
math.stackexchange.com/Content/Sites/math/Img/favicon.ico	604800.0 s	1.7 KiB
space.stackexchange.com/Content/Sites/space/Img/icon-48.png	604800.0 s	1.7 KiB
politics.stackexchange.com/Content/Sites/politics/Img/icon-48.png	604800.0 s	1.6 KiB
matheducators.stackexchange.com/Content/Sites/matheducators/Img/icon-48.png	604800.0 s	1.5 KiB
electronics.stackexchange.com/Content/Sites/electronics/Img/favicon.ico	604800.0 s	1.5 KiB
unix.stackexchange.com/Content/Sites/unix/Img/favicon.ico	604800.0 s	1.5 KiB
law.stackexchange.com/Content/Sites/law/Img/icon-48.png	604800.0 s	1.4 KiB
tex.stackexchange.com/Content/Sites/tex/Img/icon-48.png	604800.0 s	1.3 KiB
scifi.stackexchange.com/Content/Sites/scifi/Img/icon-48.png	604800.0 s	1.3 KiB
superuser.com/Content/Sites/superuser/Img/favicon.ico	604800.0 s	1.3 KiB
lh3.googleusercontent.com/a/ALm5wu2ZKm-HZQlbttbBrwGc1C9gtZ7Ij-K1hAqD9WhN=k-s36	86400.0 s	334 B
english.stackexchange.com/Content/Sites/english/Img/favicon.ico	604800.0 s	1.3 KiB
stackoverflow.com/Content/Sites/stackoverflow/Img/favicon.ico	604800.0 s	1.2 KiB
ru.stackoverflow.com/Content/Sites/ru/Img/favicon.ico	604800.0 s	1.2 KiB
superuser.com/Content/Sites/superuser/Img/icon-48.png	604800.0 s	1.2 KiB
serverfault.com/Content/Sites/serverfault/Img/favicon.ico	604800.0 s	1.1 KiB
stackexchange.com/Content/Img/hero/vote.png	604800.0 s	1.0 KiB
math.stackexchange.com/Content/Sites/math/Img/icon-48.png	604800.0 s	1.0 KiB
philosophy.stackexchange.com/Content/Sites/philosophy/Img/icon-48.png	604800.0 s	977 B
physics.stackexchange.com/Content/Sites/physics/Img/icon-48.png	604800.0 s	876 B
stackoverflow.com/Content/Sites/stackoverflow/Img/icon-48.png	604800.0 s	866 B
pm.stackexchange.com/Content/Sites/pm/Img/apple-touch-icon.png	604800.0 s	810 B
academia.stackexchange.com/Content/Sites/academia/Img/icon-48.png	604800.0 s	774 B
rpg.stackexchange.com/Content/Sites/rpg/Img/icon-48.png	604800.0 s	767 B
meta.stackexchange.com/Content/Sites/stackexchangemeta/Img/favicon.ico	604800.0 s	709 B
history.stackexchange.com/Content/Sites/history/Img/icon-48.png	604800.0 s	577 B
english.stackexchange.com/Content/Sites/english/Img/icon-48.png	604800.0 s	556 B
stackexchange.com/Content/Img/hero/close.png	604800.0 s	464 B
crypto.stackexchange.com/Content/Sites/crypto/Img/icon-48.png	604800.0 s	387 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
Italian Philosopher `div.module > div.userDetails > a > img.bar-sm`	i.sstatic.net/xajrG.png?s=64	4.8 KiB	4.6 KiB

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

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 60 ms 105.2 KiB

URL	Transfer Size	Est Savings
stackoverflow.com/Content/shared/chrome/chrome.css?v=764504b195d8	98.1 KiB	92.8 KiB
cdn.sstatic.net/stackexchange/all.css?v=db31a2669ca3	14.5 KiB	12.5 KiB

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 10.5 KiB

URL	Transfer Size	Est Savings
cdn.sstatic.net/stackexchange/Js/topbar.js?v=b2367277c351	11.0 KiB	5.3 KiB
cdn.sstatic.net/stackexchange/Js/master.js?v=ef8b6ed08310	10.0 KiB	5.2 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
Voting arrows `div.row > div > div.column > img`	stackexchange.com/Content/Img/hero/vote.png
Speech bubbles `div.row > div > div.column > img`	stackexchange.com/Content/Img/hero/bubble.png
checkmark `div.row > div > div.column > img`	stackexchange.com/Content/Img/hero/check.png
close `div.hero-box > div.close > a > img`	stackexchange.com/Content/Img/hero/close.png

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

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Time to Interactive 1.2 s

●Max Potential First Input Delay 60 ms

●Minify CSS

●Reduce unused JavaScript

●Avoids enormous network payloads Total size was 340 KiB

●JavaScript execution time 0.1 s

●Minimizes main-thread work 0.6 s

●Avoid long main-thread tasks 1 long task found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 50 ms

●Server Backend Latencies 130 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 150 ms

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○Avoid non-composited animations

○Avoid large layout shifts

Accessibility

ARIA

Some ARIA roles have required attributes that describe the state of the element to screen readers. Learn more about roles and required attributes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Search `div.s-topbar--container > form#search > div.s-topbar--searchbar--input-group > input.s-input`

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
hot `div#mainArea > div.subheader > div.tabs > a.youarehere`
4 answers \| asked 10 hours ago by vsz on scifi `div.question-container > div.question > div.metaInfo > span.va-middle`
by vsz on `div.question > div.metaInfo > span.va-middle > span.owner`
4 answers \| asked 13 hours ago by Erwann on tex `div.question-container > div.question > div.metaInfo > span.va-middle`
by Erwann on `div.question > div.metaInfo > span.va-middle > span.owner`
4 answers \| asked 18 hours ago by pie on matheducators `div.question-container > div.question > div.metaInfo > span.va-middle`
by pie on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 22 hours ago by Rafał Mach on mathoverflow `div.question-container > div.question > div.metaInfo > span.va-middle`
by Rafał Mach on `div.question > div.metaInfo > span.va-middle > span.owner`
1 answers \| asked 9 hours ago by RidiculousRichard on space `div.question-container > div.question > div.metaInfo > span.va-middle`
by RidiculousRichard on `div.question > div.metaInfo > span.va-middle > span.owner`
1 answers \| asked 17 hours ago by honestSalami on history `div.question-container > div.question > div.metaInfo > span.va-middle`
by honestSalami on `div.question > div.metaInfo > span.va-middle > span.owner`
3 answers \| asked 20 hours ago by Sebastiano on tex `div.question-container > div.question > div.metaInfo > span.va-middle`
by Sebastiano on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by Mike on rpg `div.question-container > div.question > div.metaInfo > span.va-middle`
by Mike on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by Italian Philosopher on politics `div.question-container > div.question > div.metaInfo > span.va-middle`
by Italian Philosopher on `div.question > div.metaInfo > span.va-middle > span.owner`
3 answers \| asked 14 hours ago by Rio C on puzzling `div.question-container > div.question > div.metaInfo > span.va-middle`
by Rio C on `div.question > div.metaInfo > span.va-middle > span.owner`
1 answers \| asked yesterday by Raj on scifi `div.question-container > div.question > div.metaInfo > span.va-middle`
by Raj on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 22 hours ago by karlh on tex `div.question-container > div.question > div.metaInfo > span.va-middle`
by karlh on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 21 hours ago by TomY on physics `div.question-container > div.question > div.metaInfo > span.va-middle`
by TomY on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 18 hours ago by Trevor on english `div.question-container > div.question > div.metaInfo > span.va-middle`
by Trevor on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 9 hours ago by Zachary Barbanell on crypto `div.question-container > div.question > div.metaInfo > span.va-middle`
by Zachary Barbanell on `div.question > div.metaInfo > span.va-middle > span.owner`
3 answers \| asked 22 hours ago by Alma Arjuna on math `div.question-container > div.question > div.metaInfo > span.va-middle`
by Alma Arjuna on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by Rajorshi Chattopadhyay on academia `div.question-container > div.question > div.metaInfo > span.va-middle`
by Rajorshi Chattopadhyay on `div.question > div.metaInfo > span.va-middle > span.owner`
1 answers \| asked 12 hours ago by robertspierre on superuser `div.question-container > div.question > div.metaInfo > span.va-middle`
by robertspierre on `div.question > div.metaInfo > span.va-middle > span.owner`
6 answers \| asked Apr 18 at 15:36 by Dmyt on worldbuilding `div.question-container > div.question > div.metaInfo > span.va-middle`
by Dmyt on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by Mike on rpg `div.question-container > div.question > div.metaInfo > span.va-middle`
by Mike on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by Jay Bee on space `div.question-container > div.question > div.metaInfo > span.va-middle`
by Jay Bee on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 18 hours ago by Student_Number_249812341 on physics `div.question-container > div.question > div.metaInfo > span.va-middle`
by Student_Number_249812341 on `div.question > div.metaInfo > span.va-middle > span.owner`
4 answers \| asked 2 days ago by qwerty on mathematica `div.question-container > div.question > div.metaInfo > span.va-middle`
by qwerty on `div.question > div.metaInfo > span.va-middle > span.owner`
7 answers \| asked 2 days ago by Alex on electronics `div.question-container > div.question > div.metaInfo > span.va-middle`
by Alex on `div.question > div.metaInfo > span.va-middle > span.owner`
1 answers \| asked 23 hours ago by Howard Hinnant on stackoverflow `div.question-container > div.question > div.metaInfo > span.va-middle`
by Howard Hinnant on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked yesterday by dsollen on law `div.question-container > div.question > div.metaInfo > span.va-middle`
by dsollen on `div.question > div.metaInfo > span.va-middle > span.owner`
9 answers \| asked 2 days ago by Syed on philosophy `div.question-container > div.question > div.metaInfo > span.va-middle`
by Syed on `div.question > div.metaInfo > span.va-middle > span.owner`
4 answers \| asked 2 days ago by Rean on academia `div.question-container > div.question > div.metaInfo > span.va-middle`
by Rean on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 15 hours ago by Vincent on tex `div.question-container > div.question > div.metaInfo > span.va-middle`
by Vincent on `div.question > div.metaInfo > span.va-middle > span.owner`
2 answers \| asked 20 hours ago by Joseph Rose on crafts `div.question-container > div.question > div.metaInfo > span.va-middle`
by Joseph Rose on `div.question > div.metaInfo > span.va-middle > span.owner`
per page `div#mainArea > div#question-list > div.page-sizer > span.page-numbers`
6.5k `div.featured-site > div.site-stats > div.stats-container > div.stats`
20k `div.featured-site > div.site-stats > div.stats-container > div.stats`
97% `div.featured-site > div.site-stats > div.stats-container > div.stats`
hot questions feed `section#content > div.contentWrapper > div#feed-link > a`
About `div.site-footer--col > ul.-list > li > a.js-gps-track`
Contact `div.site-footer--col > ul.-list > li > a.js-gps-track`
Feedback `div.site-footer--col > ul.-list > li > a.js-gps-track`
Stack Overflow `div.site-footer--col > ul.-list > li > a.js-gps-track`
Stack Internal `div.site-footer--col > ul.-list > li > a.js-gps-track`
Stack Data Licensing `div.site-footer--col > ul.-list > li > a.js-gps-track`
Stack Ads `div.site-footer--col > ul.-list > li > a.js-gps-track`
Press `div.site-footer--col > ul.-list > li > a.js-gps-track`
Legal `div.site-footer--col > ul.-list > li > a.js-gps-track`
Privacy Policy `div.site-footer--col > ul.-list > li > a.js-gps-track`
Terms of Service `div.site-footer--col > ul.-list > li > a.js-gps-track`
Cookie Settings `div.site-footer--col > ul.-list > li#consent-footer-link > button.s-btn`
Cookie Policy `div.site-footer--col > ul.-list > li > a.js-gps-track`
Technology `div > ul.-list > li > a.-link`
Culture & recreation `div > ul.-list > li > a.-link`
Life & arts `div > ul.-list > li > a.-link`
Science `div > ul.-list > li > a.-link`
Professional `div > ul.-list > li > a.-link`
Business `div > ul.-list > li > a.-link`
API `div > ul.-list > li.mt16 > a.-link`
Data `div > ul.-list > li > a.-link`
Blog `div.site-footer--copyright > ul.-list > li > a.js-gps-track`
Facebook `div.site-footer--copyright > ul.-list > li > a.-link`
Twitter `div.site-footer--copyright > ul.-list > li > a.-link`
LinkedIn `div.site-footer--copyright > ul.-list > li > a.-link`
Instagram `div.site-footer--copyright > ul.-list > li > a.-link`
Site design / logo © 2026 Stack Exchange Inc; `div.site-footer--container > div.site-footer--copyright > p.md:mb0 > span`
user contributions licensed under `div.site-footer--container > div.site-footer--copyright > p.md:mb0 > span`
CC BY-SA `div.site-footer--container > div.site-footer--copyright > p.md:mb0 > a.-link`
rev 2026.4.21.42306 `div.site-footer--container > div.site-footer--copyright > p.md:mb0 > span#svnrev`

These are opportunities to improve the legibility of your content.

Navigation

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Stack Exchange Q&A communities are different. Here's how: `div.hero-box > div.row > div.text > h3.title`
STACK EXCHANGE `div.site-footer--container > nav.site-footer--nav > div.site-footer--col > h5.-title`

These are opportunities to improve keyboard navigation in your application.

Names and labels

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.wrapper > header.s-topbar > div.s-topbar--container > a.s-topbar--logo `div.wrapper > header.s-topbar > div.s-topbar--container > a.s-topbar--logo`

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.

Tables and lists

Screen readers require list items (`<li>`) to be contained within a parent `<ul>`, `<ol>` or `<menu>` to be announced properly. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Tour `header.s-topbar > div.s-topbar--container > ol.s-navigation > li`
About Us `header.s-topbar > div.s-topbar--container > ol.s-navigation > li`
Meta `header.s-topbar > div.s-topbar--container > ol.s-navigation > li`

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Best practices

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]` values are valid

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

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

●Buttons have an accessible name

●Image elements have `[alt]` attributes

●Form elements have associated labels

●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

●Document has a `<title>` element

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

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

●Links are distinguishable without relying on color.

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

●Touch targets have sufficient size and spacing.

●Skip links are focusable.

●Deprecated ARIA roles were not used

●Uses ARIA roles only on compatible elements

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

●Identical links have the same purpose.

○`[accesskey]` values are unique

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

○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

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

○`<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">`

○`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

○`<object>` elements have alternate text

○Select elements have associated label elements.

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

○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.

○`[lang]` attributes have a valid value

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

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

○All heading elements contain content.

○Elements with visible text labels have matching accessible names.

○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	stackexchange.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
StorageType.persistent is deprecated. Please use standardized navigator.storage instead.	stackexchange.com/cdn-cgi/challenge-platform/scripts/jsd/main.js
Fledge	stackexchange.com/cdn-cgi/challenge-platform/scripts/jsd/main.js

●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 browser errors logged to the console

●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

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Mitigate clickjacking with XFO or CSP

SEO

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destination	Link Text
stackexchange.com/tour	Learn more

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 are crawlable

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

○robots.txt is valid

○Document has a valid `rel=canonical`

Results for https://stackexchange.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 (1)

Trust (1)

Content (4)

Navigation (1)

Return on Investment

Investment

Monthly returns

Regulatory risk avoided

Payback period

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

ARIA

Contrast

Navigation

Names and labels

Tables and lists

Best practices

Best Practices

User Experience

General

SEO

Content Best Practices

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

ARIA

Contrast

Navigation

Names and labels

Tables and lists

Best practices

Best Practices

General

SEO

Content Best Practices

Keyboard Shortcuts