Spain · Madrid Completed: Apr 15, 2026 23:25 UTCMobile 375 × 812
Desktop 1440 × 900
Score: 81 / 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.
Well-optimized for search — your content is discoverable.
Solid infrastructure — fast server responses across the board.
Mostly compliant — a few items need attention.
Good content signals with minor gaps.
Reasonable footprint with room for optimization.
The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.
Weights reflect general web best practices. Individual needs may differ.
1 control(s) without accessible label
Accessibility issues exclude users with disabilities — up to 15% of your potential audience.
No H1 heading found
Accessibility issues exclude users with disabilities — up to 15% of your potential audience.
12 third-party resources (47% of weight)
Performance issues directly impact user engagement and conversion rates.
Cross-Origin-Embedder-Policy header is missing
Security gaps expose your site and users to attacks, eroding trust.
Cross-Origin-Opener-Policy header is missing
Security gaps expose your site and users to attacks, eroding trust.
High impact, low effort — start here.
High impact, requires investment.
Small gains, minimal effort.
Nothing in this quadrant — good news.
Low impact, high effort — do last.
Nothing in this quadrant — good news.
[](https://beavercheck.com/results/6df1366b-8004-4f82-9319-ceac9167aa90)<a href="https://beavercheck.com/results/6df1366b-8004-4f82-9319-ceac9167aa90"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Falistapart.com" alt="BeaverCheck Score"></a>https://beavercheck.com/badge?url=https%3A%2F%2Falistapart.comThis badge auto-updates with your latest scan result.
Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. The 1 performance issue below shapes how fast users perceive your page. Addressing the critical issues below would have the most immediate impact on your audience reach.
$600 investment → $0.10/month returns + USD 157,500 risk avoided
$600
6h · 5 findings
$0.10 /mo
~$1.21 / year
USD 157,500
if kept compliant
$100 — 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.
6.0 developer hours at $100/hr
Based on United States rates ($100/hr)
Start here for the best return on investment
$13,125 / month at risk
~$157,501 / year if left unfixed
$157,500
+4 more
$0.10 /mo
1255.9 MB/mo × 0.080 USD/GB
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.
Unique monthly visitors from your analytics
Purchases, signups, or key actions
Optional — for revenue estimation
more engaged visitors from reduced bounce
Fix 2 critical issues to capture this value
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
Your data stays in your browser — nothing is sent to our servers
Thanks for your feedback!
We'll use a cached audit if available, or offer to scan.
Industry-standard audits powered by Google Lighthouse.
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.
1.70 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.41 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
62 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.011
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.70 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.
4.13 s
Audit breakdown by category with detailed findings.
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
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
Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.
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.
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.
Performance issues directly impact user engagement and conversion rates.
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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Duration |
|---|---|---|
| alistapart.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 31.1 KiB | 150 ms |
| alistapart.com/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1 | 5.3 KiB | |
| alistapart.com/wp-content/themes/ala/js/prism/prism.css?ver=1.0 | 1.0 KiB | |
| alistapart.com/wp-content/themes/ala/style.css?ver=1757090064 | 29.6 KiB | 300 ms |
A long cache lifetime can speed up repeat visits to your page. Learn more about caching.
Performance issues directly impact user engagement and conversion rates.
| Request | Cache TTL | Transfer Size |
|---|---|---|
| www.google-analytics.com/analytics.js | 7200.0 s | 20.9 KiB |
| secure.gaug.es/track.js | 0.0 ms | 4.0 KiB |
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
About Authors Masthead Style Guide Contact Sponsorships
Follow us:
RSS
Email
Fa… body.home > div#page > footer#colophon | alistapart.com/wp-content/themes/ala/assets/img/noise.png | 49.9 KiB | 38.9 KiB |
A Book Apart. Brief books for people who design, write, and code. div.textwidget > div.footer-promo > a > img | i0.wp.com/alistapart.com/wp-content/uploads/2019/04/promo_aba_2.jpg?w=960&ssl=1 | 6.5 KiB | 5.0 KiB |
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.
Performance issues directly impact user engagement and conversion rates.
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| alistapart.com/wp-content/themes/ala/style.css?ver=1757090064 | 29.6 KiB | 15.6 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| alistapart.com/wp-content/themes/ala/style.css?ver=1757090064 | 29.3 KiB | 26.7 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.
Multi-megabyte JavaScript bundles delay every interactive feature on the page.
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
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.googletagmanager.com/gtag/js?id=G-F1JXXVHTDV | 151.3 KiB | 64.2 KiB |
| alistapart.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 30.7 KiB | 22.2 KiB |
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
| URL | |
|---|---|
Northwestern Information Design and Strategy, School Of Professional Studies section#block-2 > div.banner > a > img.banner-logo | alistapart.com/wp-content/uploads/2026/03/IDS_700x200_Logo-300x86.jpg |
Northwestern Information Design and Strategy, School Of Professional Studies section#block-3 > div.banner > a > img.banner-logo | alistapart.com/wp-content/uploads/2026/03/IDS_700x200_Logo-300x86.jpg |
A Book Apart. Brief books for people who design, write, and code. div.textwidget > div.footer-promo > a > img | i0.wp.com/alistapart.com/wp-content/uploads/2019/04/promo_aba_2.jpg?w=960&ssl=1 |
A Book Apart Logo section#block-2 > div.banner > a > img.banner-logo | alistapart.com/wp-content/uploads/2019/03/logo_a-book-apart-color.png |
More information about the performance of your application. These numbers don't directly affect the Performance score.
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.
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Design Dialects: Breaking the Rules, Not the System div.home-posts > article#post-7175161 > header.entry-header > h4.home-post-title |
These are opportunities to improve keyboard navigation in your application.
Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
articles section#custom_html-3 > div.textwidget > div.homepage-pre-footer-message > a |
about us section#custom_html-3 > div.textwidget > div.homepage-pre-footer-message > a |
These are opportunities to improve the legibility of your content.
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.
Industry-standard audits powered by Google Lighthouse. — Desktop
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.
405 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
605 ms
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.018
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
405 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.
605 ms
Audit breakdown by category with detailed findings.
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
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
Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.
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.
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.
Performance issues directly impact user engagement and conversion rates.
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.
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.
Performance issues directly impact user engagement and conversion rates.
| Request | Cache TTL | Transfer Size |
|---|---|---|
| www.google-analytics.com/analytics.js | 7200.0 s | 20.9 KiB |
| secure.gaug.es/track.js | 0.0 ms | 4.0 KiB |
Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size
Performance issues directly impact user engagement and conversion rates.
| URL | Resource Size | Est Savings | |
|---|---|---|---|
About Authors Masthead Style Guide Contact Sponsorships
Follow us:
RSS
Email
Fa… body.home > div#page > footer#colophon | alistapart.com/wp-content/themes/ala/assets/img/noise.png | 49.9 KiB | 38.9 KiB |
Northwestern Information Design and Strategy, School Of Professional Studies section#block-2 > div.banner > a > img.banner-logo | alistapart.com/wp-content/uploads/2026/03/IDS_700x200_Logo-300x86.jpg | 7.7 KiB | 6.0 KiB |
A Book Apart. Brief books for people who design, write, and code. div.textwidget > div.footer-promo > a > img | i0.wp.com/alistapart.com/wp-content/uploads/2019/04/promo_aba_2.jpg?w=960&ssl=1 | 6.5 KiB | 5.0 KiB |
These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.
Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| alistapart.com/wp-content/themes/ala/style.css?ver=1757090064 | 29.6 KiB | 15.6 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.
Performance issues directly impact user engagement and conversion rates.
| URL | Transfer Size | Est Savings |
|---|---|---|
| alistapart.com/wp-content/themes/ala/style.css?ver=1757090064 | 29.3 KiB | 26.0 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.
Multi-megabyte JavaScript bundles delay every interactive feature on the page.
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
| URL | Transfer Size | Est Savings |
|---|---|---|
| www.googletagmanager.com/gtag/js?id=G-F1JXXVHTDV | 151.3 KiB | 64.2 KiB |
| alistapart.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 30.7 KiB | 22.2 KiB |
Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions
Performance issues directly impact user engagement and conversion rates.
| URL | |
|---|---|
Northwestern Information Design and Strategy, School Of Professional Studies section#block-2 > div.banner > a > img.banner-logo | alistapart.com/wp-content/uploads/2026/03/IDS_700x200_Logo-300x86.jpg |
Northwestern Information Design and Strategy, School Of Professional Studies section#block-3 > div.banner > a > img.banner-logo | alistapart.com/wp-content/uploads/2026/03/IDS_700x200_Logo-300x86.jpg |
A Book Apart. Brief books for people who design, write, and code. div.textwidget > div.footer-promo > a > img | i0.wp.com/alistapart.com/wp-content/uploads/2019/04/promo_aba_2.jpg?w=960&ssl=1 |
A Book Apart Logo section#block-2 > div.banner > a > img.banner-logo | alistapart.com/wp-content/uploads/2019/03/logo_a-book-apart-color.png |
More information about the performance of your application. These numbers don't directly affect the Performance score.
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.
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Design Dialects: Breaking the Rules, Not the System div.home-posts > article#post-7175161 > header.entry-header > h4.home-post-title |
These are opportunities to improve keyboard navigation in your application.
Low-contrast text is difficult or impossible for many users to read. Link text that is discernible improves the experience for users with low vision. Learn how to make links distinguishable.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
articles section#custom_html-3 > div.textwidget > div.homepage-pre-footer-message > a |
about us section#custom_html-3 > div.textwidget > div.homepage-pre-footer-message > a |
These are opportunities to improve the legibility of your content.
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.
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