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Audit Complete

Results for https://etsi.org

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Spain Spain · Madrid Completed: Apr 22, 2026 23:21 UTC
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Mobile 375 × 812

Screenshot of the audited page (Mobile 375×812)

Desktop 1440 × 900

Screenshot of the audited page (Desktop 1440×900)
C77

Site Health

Score: 77 / 100

Based on 8 categories, 0 sections

Decent speed, but optimizing further could improve engagement.

Good foundation, but a few gaps could be exploited.

Several issues make your site difficult for assistive technology users.

Well-optimized for search — your content is discoverable.

Solid infrastructure — fast server responses across the board.

Mostly compliant — a few items need attention.

Rich content metadata — your pages look great everywhere.

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

WordPress · 712 peers
You 77
·
Avg 74
At average
0 50 100
Better than 74% of WordPress sites See full WordPress benchmark →
Alpine.js · 102 peers
You 77
·
Avg 76
At average
0 50 100
Better than 71% of Alpine.js sites See full Alpine.js benchmark →

Top Priorities (5)

1

Page weighs 17.1 MB (12.0 MB transferred)

Performance issues directly impact user engagement and conversion rates.

Performance › Page Weight Budget
2

2 control(s) without accessible label

Accessibility issues exclude users with disabilities — up to 15% of your potential audience.

Accessibility › Form Accessibility
3

is missing width/height — may cause layout shift

Performance issues directly impact user engagement and conversion rates.

Performance › Image Optimization
4

101 third-party resources (100% of weight)

Performance issues directly impact user engagement and conversion rates.

Performance › Page Weight Inventory
5

102 HTTP requests — consider bundling or reducing

Performance issues directly impact user engagement and conversion rates.

Performance › Page Weight Budget
View fix priority matrix

Fix Priority Matrix

5 findings

Quick Wins

0

High impact, low effort — start here.

Nothing in this quadrant — good news.

Strategic

5

High impact, requires investment.

Easy Improvements

0

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

0

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →
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What fixing these means

Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. Your LCP of 7.4s exceeds Google's 2.5s 'Good' threshold and the 4 performance issues below directly contribute to it. Accessibility issues exclude users who rely on assistive technology — an estimated 15% of your potential audience. Addressing the critical issues below would have the most immediate impact on your conversion rate.

Your LCP is 7.4s — fixing the 4 performance criticals could bring it under Google's 2.5s 'Good' threshold.
1 accessibility issue excludes users who rely on assistive technology.
B
Could reach Estimate based on resolving critical issues

Conversion Barriers

1 critical 7 warning

8 barrier(s) likely increasing bounce by ~28%.

Speed (2)

Page takes 7.4s to load

+12% bounce

Users abandon at ~3s — you're 4.9s over the 2.5s threshold

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

High main-thread blocking time

+2% bounce

Page is non-interactive for 290ms after first paint

Fix: Defer third-party scripts and split large bundles

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)

2 form field(s) without a label

+4% bounce

Screen readers skip unlabeled fields; autofill can't identify them; checkout abandonment spikes

Fix: Associate every input with a visible <label for="…">; add autocomplete attributes

Content (1)

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 (2)

5 link(s) with generic text ("click here", "read more")

+1% bounce

Screen-reader users navigating by link list see no context — and search engines can't infer relevance

Fix: Rewrite with descriptive phrases that identify the destination

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

£713 investment → £3,502/month returns + GBP 18,050,000 risk avoided

Payback period: < 1 month First-year ROI: +5799%

Investment

£713

10h · 5 findings

Monthly returns

£3,502 /mo

~£42,028 / year

  • Conversions recovered £3,500
  • Bandwidth savings £2.37

Regulatory risk avoided

GBP 18,050,000

if kept compliant

  • UK GDPR GBP 17,500,000
  • PECR GBP 500,000
  • Equality Act 2010 GBP 50,000

Payback period

0 12mo 24mo

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

£713

9.5 developer hours at £75/hr

Based on United Kingdom rates (£75/hr)

Cost by category

Cost by effort level

Adjust assumptions
£ /hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

What Inaction Is Costing You

£1,504,169 / month at risk

~£18,050,028 / year if left unfixed

Compliance Risk

£18,050,000

UK GDPRPECREquality Act 2010
  • No privacy policy link detected
    UK GDPR: GBP 10,000 – GBP 17,500,000
  • Trackers detected but no cookie policy found
    UK GDPR: GBP 10,000 – GBP 17,500,000
  • Trackers detected but no cookie policy found
    PECR: GBP 1,000 – GBP 500,000

+5 more

Bandwidth Waste

£2.37 /mo

37691.7 MB/mo × 0.063 GBP/GB

  • Optimize transfer: save ~3.8 MB per page load
    Saves £2.37/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

Unique monthly visitors from your analytics

Purchases, signups, or key actions

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

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

55
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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.

3.89 s

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

7.44 s

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

290 ms

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

0.014

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

8.03 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.

12.81 s

Detailed Report

Audit breakdown by category with detailed findings.

55

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.

RequestCache TTLTransfer Size
www.etsi.org/wp-content/uploads/timelapse-jungle-small-6_25-speed.mp40.0 ms7.6 MiB
www.etsi.org/wp-content/uploads/banner-first-frame.jpg0.0 ms276.5 KiB
www.etsi.org/wp-content/uploads/header-technology-radar-2-768x187.png0.0 ms239.1 KiB
img.youtube.com/vi/2p9sIugbIwo/maxresdefault.jpg7200.0 s205.3 KiB
www.etsi.org/wp-content/uploads/cover-image-ga-2026.png0.0 ms145.8 KiB
www.etsi.org/wp-content/uploads/car-image-eaa-plugtests.png0.0 ms121.7 KiB
www.juicer.io/embed_juicer20.js3600.0 s83.4 KiB
www.etsi.org/wp-content/themes/etsi/js/swiper-bundle.min.js?ver=1.00.0 ms43.0 KiB
www.etsi.org/wp-includes/css/dashicons.min.css?ver=6.9.40.0 ms34.6 KiB
www.etsi.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.10.0 ms31.1 KiB
www.etsi.org/wp-content/themes/etsi/fonts/SpaceGrotesk-Medium.woff20.0 ms30.9 KiB
www.etsi.org/wp-content/themes/etsi/fonts/SpaceGrotesk-Regular.woff20.0 ms30.8 KiB
www.etsi.org/wp-content/themes/etsi/fonts/SpaceGrotesk-SemiBold.woff20.0 ms30.8 KiB
www.etsi.org/wp-content/themes/etsi/fonts/SpaceGrotesk-Light.woff20.0 ms30.0 KiB
www.etsi.org/wp-content/themes/etsi/fonts/SpaceGrotesk-Bold.woff20.0 ms29.6 KiB
/wp-content/plugins/sfwd-lms/themes/ld30/assets/css/learn...0.0 ms26.0 KiB
www.etsi.org/wp-content/themes/etsi/style.css?ver=17768624760.0 ms24.7 KiB
www.etsi.org/wp-content/uploads/EC-INT1.jpg0.0 ms24.6 KiB
www.etsi.org/wp-content/uploads/logo-etsi.png0.0 ms23.7 KiB
www.etsi.org/wp-content/themes/etsi/images/logo-etsi.png0.0 ms23.7 KiB
www.etsi.org/wp-content/themes/etsi/images/icon-members.svg0.0 ms22.9 KiB
www.etsi.org/wp-content/uploads/timelapse-jungle-small-6_25-speed.mp40.0 ms21.5 KiB
/wp-content/plugins/search-filter-pro/public/assets/js/se...0.0 ms19.3 KiB
www.juicer.io/tailwind_embed.css3600.0 s20.6 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...0.0 ms13.2 KiB
/wp-content/plugins/sfwd-lms/themes/ld30/assets/js/learnd...0.0 ms12.7 KiB
www.etsi.org/wp-includes/js/jquery/ui/datepicker.min.js?ver=1.13.30.0 ms11.4 KiB
www.etsi.org/wp-content/themes/etsi/images/logo-etsi-w.png0.0 ms11.1 KiB
www.etsi.org/wp-content/themes/etsi/js/main.js?ver=17764334180.0 ms10.4 KiB
www.etsi.org/wp-content/plugins/easy-fancybox/vendor/purify.min.js?ver=6.9.40.0 ms9.1 KiB
/wp-content/plugins/uncanny-learndash-toolkit/src/assets/...0.0 ms8.3 KiB
www.juicer.io/api/media/28277826?s=24ffb1be9ad2b3e23225998b965a758604042f7a1209600.0 s76.1 KiB
www.etsi.org/wp-includes/js/jquery/ui/core.min.js?ver=1.13.30.0 ms7.5 KiB
www.etsi.org/wp-content/themes/etsi/css/embed_juicer20.css0.0 ms7.4 KiB
/wp-content/plugins/search-filter-pro/public/assets/js/ch...0.0 ms7.2 KiB
/wp-content/plugins/search-filter-pro/public/assets/css/s...0.0 ms6.9 KiB
/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.f...0.0 ms6.0 KiB
www.etsi.org/wp-includes/js/wp-emoji-release.min.js?ver=6.9.40.0 ms5.6 KiB
/wp-content/plugins/sfwd-lms/themes/ld30/assets/fonts/ld-...0.0 ms5.5 KiB
www.etsi.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.10.0 ms5.2 KiB
www.juicer.io/embed/etsi/wp-plugin-1-12.js?nojquery=true&per=3&pages=3&ver=6.9.4600.0 s5.7 KiB
www.etsi.org/wp-content/themes/etsi/js/swiper-bundle.min.css?ver=1.00.0 ms5.0 KiB
/wp-content/plugins/uncanny-learndash-toolkit/src/assets/...0.0 ms4.8 KiB
/wp-content/plugins/learndash-certificate-verify-and-shar...0.0 ms4.6 KiB
www.juicer.io/api/media/28367641?s=bbd89c9f559cdbcf4a7991bbde3469ea0739c0681209600.0 s42.5 KiB
www.juicer.io/api/media/28371375?s=ec69ef1c26cebe203f197ef9f1ffb620add1b3eb1209600.0 s42.4 KiB
/wp-content/plugins/sfwd-lms/src/assets/dist/css/styles.c...0.0 ms3.9 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/assets/...0.0 ms3.1 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...0.0 ms3.1 KiB
/wp-content/plugins/learndash-certificate-verify-and-shar...0.0 ms3.1 KiB
/wp-content/plugins/sfwd-lms/themes/legacy/templates/lear...0.0 ms2.7 KiB
www.etsi.org/wp-content/themes/etsi/images/icon-youtube.png0.0 ms2.6 KiB
www.etsi.org/wp-content/themes/etsi/images/icon-linkedin.png0.0 ms2.3 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...0.0 ms2.2 KiB
/wp-content/plugins/wordpress-popular-posts/assets/js/wpp...0.0 ms1.7 KiB
/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.f...0.0 ms1.6 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...0.0 ms1.5 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...0.0 ms1.5 KiB
/wp-content/plugins/easy-fancybox/vendor/jquery.mousewhee...0.0 ms1.4 KiB
/dms/image/v2/C4D0BAQFKMxoWuTF-Aw/company-logo_100_100/co...86400.0 s3.1 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...0.0 ms1.2 KiB
www.etsi.org/wp-content/themes/etsi/js/etsi-builder-tabs-ajax.js?ver=17750315240.0 ms1.2 KiB
/wp-content/plugins/easy-fancybox/vendor/jquery.easing.mi...0.0 ms1.0 KiB
/wp-content/plugins/interactive-3d-flipbook-powered-physi...0.0 ms1.0 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...0.0 ms1003 B
/wp-content/plugins/sfwd-lms/src/assets/dist/js/breakpoin...0.0 ms946 B
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...0.0 ms915 B
www.etsi.org/wp-content/plugins/sfwd-lms/src/assets/dist/js/main.js?ver=5.0.40.0 ms884 B
/wp-content/plugins/wordpress-popular-posts/assets/css/wp...0.0 ms874 B
/wp-content/plugins/ninja-forms-uploads/assets/js/nfplugi...0.0 ms808 B
/wp-content/plugins/sfwd-lms/assets/css/jquery.dropdown.m...0.0 ms778 B
/wp-content/plugins/sfwd-lms/themes/legacy/templates/lear...0.0 ms712 B
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...0.0 ms663 B
www.etsi.org/wp-content/themes/etsi/images/icon-search.svg0.0 ms648 B
www.etsi.org/wp-content/themes/etsi/images/icon-search-w.svg0.0 ms608 B
/wp-content/plugins/sfwd-lms/src/assets/dist/css/admin-ba...0.0 ms495 B
www.etsi.org/wp-content/themes/etsi/images/arrow-right-submenu.svg0.0 ms495 B
www.etsi.org/wp-content/themes/etsi/images/arrow-right.svg0.0 ms473 B
www.etsi.org/wp-content/themes/etsi/images/arrow-left-submenu.svg0.0 ms473 B
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...0.0 ms467 B
/api/posts/507350490/poster_images.jpg?external_id=etsi_9...1209600.0 s3.0 KiB
www.etsi.org/wp-content/uploads/timelapse-jungle-small-6_25-speed.mp40.0 ms0 B

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.

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:63.549 source:map[column:33217 line:1 type:source-location url:https://www.etsi.org/wp-content/plugins/webtoffee-cookie-consent/lite/frontend/js/script.min.js?ver=3.5.1 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:63.549 source:map[column:41955 line:0 type:source-location url:https://www.etsi.org/wp-content/plugins/webtoffee-cookie-consent/lite/frontend/js/script.min.js?ver=3.5.1 urlProvider:network]] map[reflowTime:16.263 source:map[column:84992 line:1 type:source-location url:https://www.etsi.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 urlProvider:network]] map[reflowTime:7.617 source:map[column:4766 line:12 type:source-location url:https://www.etsi.org/wp-content/themes/etsi/js/swiper-bundle.min.js?ver=1.0 urlProvider:network]] map[reflowTime:10.86 source:map[column:56228 line:12 type:source-location url:https://www.etsi.org/wp-content/themes/etsi/js/swiper-bundle.min.js?ver=1.0 urlProvider:network]] map[reflowTime:5.743 source:map[column:10480 line:12 type:source-location url:https://www.etsi.org/wp-content/themes/etsi/js/swiper-bundle.min.js?ver=1.0 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.

URLResource SizeEst Savings
main#section_main > div#page_banner > div.page_banner_video > video.bg-video main#section_main > div#page_banner > div.page_banner_video > video.bg-video
www.etsi.org/wp-content/uploads/banner-first-frame.jpg275.9 KiB243.7 KiB
Green radar with a world map behind lines of binary code li > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/header-technology-radar-2-768x187.png238.5 KiB231.3 KiB
li > article.grid_box > p.box_img > img.attachment-large li > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/cover-image-ga-2026.png145.3 KiB133.0 KiB
Padlock on a white background div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/car-image-eaa-plugtests.png121.3 KiB108.9 KiB
ETSI header#header_main > div.container > a#logo_etsi > img
www.etsi.org/wp-content/themes/etsi/images/logo-etsi.png23.4 KiB21.9 KiB
li > article.grid_box > p.box_img > img.attachment-large li > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/EC-INT1.jpg24.3 KiB12.5 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:2382.876 label:Time to first byte subpart:timeToFirstByte] map[duration:14.485 label:Resource load delay subpart:resourceLoadDelay] map[duration:250.371 label:Resource load duration subpart:resourceLoadDuration] map[duration:38.41 label:Element render delay subpart:elementRenderDelay]]
lhId: page-6-DIV
nodeLabel: Welcome to the global community that is shaping tomorrow’s technology standards…
path: 1,HTML,1,BODY,6,DIV,1,MAIN,0,DIV
selector: body.home > div#overall-wrapper > main#section_main > div#page_banner
snippet: <div id="page_banner" style="background-image: url(&quot;https://www.etsi.org/wp-content/uploads/banner-first…&quot;);">

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-6-DIV
nodeLabel: Welcome to the global community that is shaping tomorrow’s technology standards…
path: 1,HTML,1,BODY,6,DIV,1,MAIN,0,DIV
selector: body.home > div#overall-wrapper > main#section_main > div#page_banner
snippet: <div id="page_banner" style="background-image: url(&quot;https://www.etsi.org/wp-content/uploads/banner-first…&quot;);">

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.

URLTransfer SizeDuration
www.etsi.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.131.1 KiB150 ms
www.etsi.org/wp-includes/css/dashicons.min.css?ver=6.9.434.6 KiB301 ms
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...13.2 KiB
/wp-content/plugins/ninja-forms-uploads/assets/js/nfplugi...808 B
/wp-content/plugins/wordpress-popular-posts/assets/css/wp...874 B
/wp-content/plugins/uncanny-learndash-toolkit/src/assets/...8.3 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...2.2 KiB
/wp-content/plugins/search-filter-pro/public/assets/css/s...6.9 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...1.5 KiB
/wp-content/plugins/sfwd-lms/src/assets/dist/css/admin-ba...495 B
/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.f...1.6 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...663 B
www.etsi.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.15.2 KiB150 ms
/wp-content/plugins/sfwd-lms/themes/ld30/assets/css/learn...26.0 KiB150 ms
www.etsi.org/wp-content/themes/etsi/js/swiper-bundle.min.css?ver=1.05.0 KiB
/wp-content/plugins/sfwd-lms/src/assets/dist/css/styles.c...3.9 KiB
/wp-content/plugins/sfwd-lms/themes/legacy/templates/lear...712 B
/wp-content/plugins/learndash-certificate-verify-and-shar...4.6 KiB
/wp-content/plugins/sfwd-lms/assets/css/jquery.dropdown.m...778 B
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...467 B
/wp-content/plugins/uncanny-learndash-toolkit/src/assets/...4.8 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...1.2 KiB
/wp-content/plugins/sfwd-lms/themes/legacy/templates/lear...2.7 KiB
/wp-content/plugins/wordpress-popular-posts/assets/js/wpp...1.7 KiB
www.etsi.org/wp-content/themes/etsi/style.css?ver=177686247624.7 KiB150 ms

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: 1.3 s
URLTime Spent
etsi.org/1.3 s
www.etsi.org/0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.7 s
URLTime Spent
www.etsi.org/1.8 s

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

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 6.1 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.

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.

CategoryTime Spent
Other1.0 s
Script Evaluation949 ms
Style & Layout776 ms
Script Parsing & Compilation182 ms
Rendering147 ms
Parse HTML & CSS145 ms
Garbage Collection36 ms

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 9.3 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

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.

article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full
circles connected by lines - icon article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full
article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full
article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full

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

Layout shift culprits
Optimize DOM size
Modern HTTP
Optimize viewport for mobile
User Timing marks and measures 7 user timings
JavaScript execution time 1.0 s
Avoid long main-thread tasks 10 long tasks found
Page didn't prevent back/forward cache restoration
Network Requests
Network Round Trip Times 30 ms
Server Backend Latencies 550 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Avoid large layout shifts 2 layout shifts found
INP breakdown
Avoid non-composited animations
95

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
Step 1 - Select your technology area of interest form#search-filter-form-27 > ul > li.sf-field-taxonomy-technology > h4

These are opportunities to improve keyboard navigation in your application.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Go to slide 1 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 2 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 3 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 4 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 5 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 6 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 7 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 8 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 9 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 10 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 11 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 12 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 1 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 2 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 3 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 4 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 5 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 6 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 7 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 8 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 9 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 10 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 11 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 12 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet

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
Image elements have `[alt]` attributes
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`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
`<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
Document has a main landmark.
Deprecated ARIA roles were not used
`<video>` elements contain a `<track>` element with `[kind="captions"]`
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
`<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
Form elements have associated labels
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.
`[lang]` attributes have a valid value
Tables have different content in the summary attribute and `<caption>`.
All heading elements contain content.
Uses ARIA roles only on compatible elements
Image elements do not have `[alt]` attributes that are redundant text.
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.
100

Best Practices

Uses HTTPS
Avoids deprecated APIs
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
92

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.

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
robots.txt is valid
Image elements have `[alt]` attributes
Document has a valid `hreflang`
Document has a valid `rel=canonical`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

77
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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.

1.47 s

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

2.30 s

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

1 ms

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

0.001

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

2.85 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.

2.30 s

Detailed Report

Audit breakdown by category with detailed findings.

77

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.

RequestCache TTLTransfer Size
www.etsi.org/wp-content/uploads/timelapse-jungle-small-6_25-speed.mp40.0 ms9.4 MiB
www.etsi.org/wp-content/uploads/header-technology-radar-2-1024x249.png0.0 ms397.5 KiB
www.etsi.org/wp-content/uploads/banner-first-frame.jpg0.0 ms276.5 KiB
img.youtube.com/vi/2p9sIugbIwo/maxresdefault.jpg7200.0 s205.3 KiB
www.etsi.org/wp-content/uploads/cover-image-ga-2026.png0.0 ms145.8 KiB
www.etsi.org/wp-content/uploads/card-defense-communications-forum-2026.png0.0 ms142.0 KiB
www.etsi.org/wp-content/uploads/card-image-mcx-plugtests-300x233.png0.0 ms133.7 KiB
www.etsi.org/wp-content/uploads/car-image-eaa-plugtests.png0.0 ms121.8 KiB
www.etsi.org/wp-content/uploads/card-image-ng-ecall-plugtests-300x233.png0.0 ms114.6 KiB
www.etsi.org/wp-content/uploads/card-image-ng112-plugtests-300x233.png0.0 ms109.4 KiB
www.etsi.org/wp-content/uploads/card-image-tfs-hackfest-9-300x233.png0.0 ms108.2 KiB
www.etsi.org/wp-content/uploads/card-webinars-300x233.png0.0 ms99.1 KiB
www.etsi.org/wp-content/uploads/card-futurenet-world-2026.png0.0 ms98.9 KiB
www.etsi.org/wp-content/uploads/HEADER-CRA-2026-315x245-1.png0.0 ms86.4 KiB
www.juicer.io/embed_juicer20.js3600.0 s83.4 KiB
www.etsi.org/wp-content/themes/etsi/js/swiper-bundle.min.js?ver=1.00.0 ms42.9 KiB
www.etsi.org/wp-content/themes/etsi/images/bkg_banner_blue.png0.0 ms42.3 KiB
www.etsi.org/wp-includes/css/dashicons.min.css?ver=6.9.40.0 ms34.7 KiB
www.etsi.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.10.0 ms31.1 KiB
www.etsi.org/wp-content/themes/etsi/fonts/SpaceGrotesk-Medium.woff20.0 ms30.9 KiB
www.etsi.org/wp-content/themes/etsi/fonts/SpaceGrotesk-Regular.woff20.0 ms30.8 KiB
www.etsi.org/wp-content/themes/etsi/fonts/SpaceGrotesk-SemiBold.woff20.0 ms30.8 KiB
www.etsi.org/wp-content/themes/etsi/fonts/SpaceGrotesk-Light.woff20.0 ms30.0 KiB
www.etsi.org/wp-content/themes/etsi/fonts/SpaceGrotesk-Bold.woff20.0 ms29.6 KiB
/wp-content/plugins/sfwd-lms/themes/ld30/assets/css/learn...0.0 ms25.9 KiB
www.etsi.org/wp-content/themes/etsi/style.css?ver=17768624760.0 ms24.8 KiB
www.etsi.org/wp-content/uploads/EC-INT1.jpg0.0 ms24.7 KiB
www.etsi.org/wp-content/uploads/logo-etsi.png0.0 ms23.8 KiB
www.etsi.org/wp-content/themes/etsi/images/logo-etsi.png0.0 ms23.8 KiB
www.etsi.org/wp-content/themes/etsi/images/icon-members.svg0.0 ms22.9 KiB
www.etsi.org/wp-content/uploads/timelapse-jungle-small-6_25-speed.mp40.0 ms21.5 KiB
/wp-content/plugins/search-filter-pro/public/assets/js/se...0.0 ms19.3 KiB
www.juicer.io/tailwind_embed.css3600.0 s20.6 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...0.0 ms13.1 KiB
/wp-content/plugins/sfwd-lms/themes/ld30/assets/js/learnd...0.0 ms12.8 KiB
www.etsi.org/wp-content/uploads/disribution-icon.svg0.0 ms12.4 KiB
www.etsi.org/wp-includes/js/jquery/ui/datepicker.min.js?ver=1.13.30.0 ms11.5 KiB
www.etsi.org/wp-content/themes/etsi/images/logo-etsi-w.png0.0 ms11.0 KiB
www.etsi.org/wp-content/themes/etsi/js/main.js?ver=17764334180.0 ms10.4 KiB
www.etsi.org/wp-content/plugins/easy-fancybox/vendor/purify.min.js?ver=6.9.40.0 ms8.9 KiB
/wp-content/plugins/uncanny-learndash-toolkit/src/assets/...0.0 ms8.3 KiB
www.juicer.io/api/media/28277826?s=24ffb1be9ad2b3e23225998b965a758604042f7a1209600.0 s76.7 KiB
www.etsi.org/wp-includes/js/jquery/ui/core.min.js?ver=1.13.30.0 ms7.4 KiB
www.etsi.org/wp-content/themes/etsi/css/embed_juicer20.css0.0 ms7.4 KiB
/wp-content/plugins/search-filter-pro/public/assets/js/ch...0.0 ms7.3 KiB
/wp-content/plugins/search-filter-pro/public/assets/css/s...0.0 ms7.0 KiB
/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.f...0.0 ms6.0 KiB
www.etsi.org/wp-includes/js/wp-emoji-release.min.js?ver=6.9.40.0 ms5.6 KiB
/wp-content/plugins/sfwd-lms/themes/ld30/assets/fonts/ld-...0.0 ms5.5 KiB
www.etsi.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.10.0 ms5.2 KiB
www.juicer.io/embed/etsi/wp-plugin-1-12.js?nojquery=true&per=3&pages=3&ver=6.9.4600.0 s5.7 KiB
www.etsi.org/wp-content/themes/etsi/js/swiper-bundle.min.css?ver=1.00.0 ms5.1 KiB
/wp-content/plugins/uncanny-learndash-toolkit/src/assets/...0.0 ms4.8 KiB
/wp-content/plugins/learndash-certificate-verify-and-shar...0.0 ms4.6 KiB
www.juicer.io/api/media/28371375?s=ec69ef1c26cebe203f197ef9f1ffb620add1b3eb1209600.0 s42.4 KiB
www.juicer.io/api/media/28367641?s=bbd89c9f559cdbcf4a7991bbde3469ea0739c0681209600.0 s42.2 KiB
/wp-content/plugins/sfwd-lms/src/assets/dist/css/styles.c...0.0 ms3.8 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/assets/...0.0 ms3.1 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...0.0 ms3.1 KiB
/wp-content/plugins/learndash-certificate-verify-and-shar...0.0 ms3.0 KiB
/wp-content/plugins/sfwd-lms/themes/legacy/templates/lear...0.0 ms2.7 KiB
www.etsi.org/wp-content/themes/etsi/images/icon-youtube.png0.0 ms2.6 KiB
www.etsi.org/wp-content/themes/etsi/images/icon-linkedin.png0.0 ms2.3 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...0.0 ms2.2 KiB
/wp-content/plugins/wordpress-popular-posts/assets/js/wpp...0.0 ms1.7 KiB
/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.f...0.0 ms1.6 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...0.0 ms1.6 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...0.0 ms1.5 KiB
/wp-content/plugins/easy-fancybox/vendor/jquery.mousewhee...0.0 ms1.4 KiB
/dms/image/v2/C4D0BAQFKMxoWuTF-Aw/company-logo_100_100/co...86400.0 s3.1 KiB
www.etsi.org/wp-content/themes/etsi/js/etsi-builder-tabs-ajax.js?ver=17750315240.0 ms1.2 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...0.0 ms1.1 KiB
/wp-content/plugins/easy-fancybox/vendor/jquery.easing.mi...0.0 ms1.1 KiB
/wp-content/plugins/interactive-3d-flipbook-powered-physi...0.0 ms1.0 KiB
www.etsi.org/wp-content/uploads/icon-people.svg0.0 ms985 B
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...0.0 ms948 B
/wp-content/plugins/sfwd-lms/src/assets/dist/js/breakpoin...0.0 ms942 B
www.etsi.org/wp-content/uploads/icon-global.svg0.0 ms936 B
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...0.0 ms911 B
www.etsi.org/wp-content/plugins/sfwd-lms/src/assets/dist/js/main.js?ver=5.0.40.0 ms889 B
/wp-content/plugins/wordpress-popular-posts/assets/css/wp...0.0 ms886 B
www.etsi.org/wp-content/uploads/icon-sunrise.svg0.0 ms812 B
/wp-content/plugins/sfwd-lms/assets/css/jquery.dropdown.m...0.0 ms752 B
/wp-content/plugins/ninja-forms-uploads/assets/js/nfplugi...0.0 ms748 B
www.etsi.org/wp-content/themes/etsi/images/arrow-left-scroller.svg0.0 ms701 B
www.etsi.org/wp-content/themes/etsi/images/arrow-right-scroller.svg0.0 ms679 B
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...0.0 ms651 B
www.etsi.org/wp-content/themes/etsi/images/icon-search-w.svg0.0 ms633 B
/wp-content/plugins/sfwd-lms/themes/legacy/templates/lear...0.0 ms618 B
www.etsi.org/wp-content/themes/etsi/images/icon-search.svg0.0 ms597 B
www.etsi.org/wp-content/themes/etsi/images/arrow-right.svg0.0 ms525 B
www.etsi.org/wp-content/themes/etsi/images/arrow-right-w.svg0.0 ms503 B
/wp-content/plugins/sfwd-lms/src/assets/dist/css/admin-ba...0.0 ms491 B
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...0.0 ms463 B
www.etsi.org/wp-content/themes/etsi/images/arrow-down.svg0.0 ms449 B
/api/posts/507350490/poster_images.jpg?external_id=etsi_9...1209600.0 s2.7 KiB
www.etsi.org/wp-content/uploads/timelapse-jungle-small-6_25-speed.mp40.0 ms0 B

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.

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:78.145 source:map[column:33217 line:1 type:source-location url:https://www.etsi.org/wp-content/plugins/webtoffee-cookie-consent/lite/frontend/js/script.min.js?ver=3.5.1 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:78.145 source:map[column:41955 line:0 type:source-location url:https://www.etsi.org/wp-content/plugins/webtoffee-cookie-consent/lite/frontend/js/script.min.js?ver=3.5.1 urlProvider:network]] map[reflowTime:0.557 source:map[type:text value:[unattributed]]] map[reflowTime:22.581 source:map[column:84992 line:1 type:source-location url:https://www.etsi.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 urlProvider:network]] map[reflowTime:5.674 source:map[column:4766 line:12 type:source-location url:https://www.etsi.org/wp-content/themes/etsi/js/swiper-bundle.min.js?ver=1.0 urlProvider:network]] map[reflowTime:11.828 source:map[column:10480 line:12 type:source-location url:https://www.etsi.org/wp-content/themes/etsi/js/swiper-bundle.min.js?ver=1.0 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.

URLResource SizeEst Savings
Green radar with a world map behind lines of binary code li > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/header-technology-radar-2-1024x249.png396.7 KiB387.2 KiB
main#section_main > div#page_banner > div.page_banner_video > video.bg-video main#section_main > div#page_banner > div.page_banner_video > video.bg-video
www.etsi.org/wp-content/uploads/banner-first-frame.jpg275.9 KiB174.3 KiB
div.swiper-slide > article.grid_box > p.box_img > img.attachment-large div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/cover-image-ga-2026.png145.3 KiB141.3 KiB
div.swiper-slide > article.grid_box > p.box_img > img.attachment-large div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/card-defense-communications-forum-2026.png141.4 KiB137.4 KiB
div.swiper-slide > article.grid_box > p.box_img > img.attachment-large div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/card-image-mcx-plugtests-300x233.png133.2 KiB124.9 KiB
Padlock on a white background div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/car-image-eaa-plugtests.png121.3 KiB117.3 KiB
div.swiper-slide > article.grid_box > p.box_img > img.attachment-large div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/card-image-ng-ecall-plugtests-300x233.png114.2 KiB105.8 KiB
div.swiper-slide > article.grid_box > p.box_img > img.attachment-large div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/card-image-ng112-plugtests-300x233.png109.0 KiB100.6 KiB
div.swiper-slide > article.grid_box > p.box_img > img.attachment-large div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/card-image-tfs-hackfest-9-300x233.png107.8 KiB99.5 KiB
FUTURENET WORLD div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/card-futurenet-world-2026.png98.5 KiB94.5 KiB
Woman looking at her screen in a virtual meeting div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/card-webinars-300x233.png98.7 KiB90.3 KiB
CRA 2026 Workshops div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/HEADER-CRA-2026-315x245-1.png86.0 KiB82.0 KiB
ETSI header#header_main > div.container > a#logo_etsi > img
www.etsi.org/wp-content/themes/etsi/images/logo-etsi.png23.4 KiB22.1 KiB
div.swiper-slide > article.grid_box > p.box_img > img.attachment-large div.swiper-slide > article.grid_box > p.box_img > img.attachment-large
www.etsi.org/wp-content/uploads/EC-INT1.jpg24.3 KiB19.4 KiB

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:2460.139 label:Time to first byte subpart:timeToFirstByte] map[duration:11.304 label:Resource load delay subpart:resourceLoadDelay] map[duration:110.25 label:Resource load duration subpart:resourceLoadDuration] map[duration:222.847 label:Element render delay subpart:elementRenderDelay]]
lhId: page-14-DIV
nodeLabel: Welcome to the global community that is shaping tomorrow’s technology standards…
path: 1,HTML,1,BODY,6,DIV,1,MAIN,0,DIV
selector: body.home > div#overall-wrapper > main#section_main > div#page_banner
snippet: <div id="page_banner" style="background-image: url(&quot;https://www.etsi.org/wp-content/uploads/banner-first…&quot;);">

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-14-DIV
nodeLabel: Welcome to the global community that is shaping tomorrow’s technology standards…
path: 1,HTML,1,BODY,6,DIV,1,MAIN,0,DIV
selector: body.home > div#overall-wrapper > main#section_main > div#page_banner
snippet: <div id="page_banner" style="background-image: url(&quot;https://www.etsi.org/wp-content/uploads/banner-first…&quot;);">

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.

URLTransfer Size
www.etsi.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.131.1 KiB
/wp-content/plugins/sfwd-lms/themes/ld30/assets/css/learn...25.9 KiB
/wp-content/plugins/uncanny-learndash-toolkit/src/assets/...8.3 KiB
www.etsi.org/wp-content/themes/etsi/style.css?ver=177686247624.8 KiB
www.etsi.org/wp-includes/css/dashicons.min.css?ver=6.9.434.7 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...13.1 KiB
/wp-content/plugins/easy-fancybox/fancybox/1.5.4/jquery.f...1.6 KiB
www.etsi.org/wp-content/themes/etsi/js/swiper-bundle.min.css?ver=1.05.1 KiB
/wp-content/plugins/webtoffee-cookie-consent/lite/fronten...2.2 KiB
/wp-content/plugins/ninja-forms-uploads/assets/js/nfplugi...748 B
www.etsi.org/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.15.2 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...651 B
/wp-content/plugins/search-filter-pro/public/assets/css/s...7.0 KiB
/wp-content/plugins/wordpress-popular-posts/assets/css/wp...886 B
/wp-content/plugins/sfwd-lms/assets/css/jquery.dropdown.m...752 B
/wp-content/plugins/learndash-certificate-verify-and-shar...4.6 KiB
/wp-content/plugins/sfwd-lms/src/assets/dist/css/styles.c...3.8 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...1.5 KiB
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...463 B
/wp-content/plugins/sfwd-lms/includes/course-grid/templat...1.1 KiB
/wp-content/plugins/sfwd-lms/src/assets/dist/css/admin-ba...491 B
/wp-content/plugins/sfwd-lms/themes/legacy/templates/lear...618 B
/wp-content/plugins/sfwd-lms/themes/legacy/templates/lear...2.7 KiB
/wp-content/plugins/uncanny-learndash-toolkit/src/assets/...4.8 KiB
/wp-content/plugins/wordpress-popular-posts/assets/js/wpp...1.7 KiB

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

Diagnostics

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 6.2 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.

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

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 9.3 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
article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full
www.etsi.org/wp-content/uploads/icon-people.svg
article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full
www.etsi.org/wp-content/uploads/icon-sunrise.svg
circles connected by lines - icon article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full
www.etsi.org/wp-content/uploads/disribution-icon.svg
article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full article.builder_boxes_2_imgtxt_col > div.builder_boxes_2_imgtxt_col_info > p.builder_boxes_3_icon_img > img.attachment-full
www.etsi.org/wp-content/uploads/icon-global.svg

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

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: 737 ms
URLTime Spent
etsi.org/737 ms
www.etsi.org/0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.8 s
URLTime Spent
www.etsi.org/1.9 s
Time to Interactive 2.3 s
Layout shift culprits
Optimize DOM size
Modern HTTP
Optimize viewport for mobile
Max Potential First Input Delay 50 ms
User Timing marks and measures 5 user timings
JavaScript execution time 0.2 s
Minimizes main-thread work 0.9 s
Avoid long main-thread tasks 1 long task found
Page didn't prevent back/forward cache restoration
Network Requests
Network Round Trip Times 30 ms
Server Backend Latencies 500 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Avoid large layout shifts 1 layout shift found
INP breakdown
Avoid non-composited animations
95

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
Step 1 - Select your technology area of interest form#search-filter-form-27 > ul > li.sf-field-taxonomy-technology > h4

These are opportunities to improve keyboard navigation in your application.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Go to slide 1 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 2 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 3 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 4 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 5 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 6 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 7 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 8 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 9 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 1 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 2 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 3 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 4 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 5 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 6 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 7 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 8 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet
Go to slide 9 div.swiper_arrows_adjust > div.swiper > div.swiper-pagination > span.swiper-pagination-bullet

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
Image elements have `[alt]` attributes
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`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
`<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
Document has a main landmark.
Deprecated ARIA roles were not used
`<video>` elements contain a `<track>` element with `[kind="captions"]`
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
`<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
Form elements have associated labels
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.
`[lang]` attributes have a valid value
Tables have different content in the summary attribute and `<caption>`.
All heading elements contain content.
Uses ARIA roles only on compatible elements
Image elements do not have `[alt]` attributes that are redundant text.
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.
100

Best Practices

Uses HTTPS
Avoids deprecated APIs
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
92

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.

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
robots.txt is valid
Image elements have `[alt]` attributes
Document has a valid `hreflang`
Document has a valid `rel=canonical`

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