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· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

96

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

Performance issues directly impact user engagement and conversion rates.

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.autoskolanemec.cz/images/assets/background.png0.0 ms1.6 MiB
www.autoskolanemec.cz/images/assets/photo3.png0.0 ms1.1 MiB
www.autoskolanemec.cz/images/assets/photo2.png0.0 ms1.0 MiB
www.autoskolanemec.cz/images/assets/photo1.png0.0 ms1.0 MiB
www.autoskolanemec.cz/images/assets/fon.png0.0 ms453.0 KiB
www.autoskolanemec.cz/images/assets/trenazer.jpg0.0 ms232.1 KiB
www.autoskolanemec.cz/images/assets/autoheader.png0.0 ms182.1 KiB
www.autoskolanemec.cz/images/assets/trenazery2.jpg0.0 ms180.0 KiB
www.autoskolanemec.cz/images/assets/ucebna2.jpg0.0 ms130.8 KiB
www.autoskolanemec.cz/images/assets/auto2.png0.0 ms121.1 KiB
www.autoskolanemec.cz/media/gantry5/assets/webfonts/fa-solid-900.woff20.0 ms78.5 KiB
www.autoskolanemec.cz/media/gantry5/assets/webfonts/fa-brands-400.woff20.0 ms75.9 KiB
www.autoskolanemec.cz/media/vendor/jquery/js/jquery.min.js?3.6.00.0 ms30.5 KiB
www.autoskolanemec.cz/templates/g5_helium/custom/js/jluikit.min.js0.0 ms28.4 KiB
www.autoskolanemec.cz/images/assets/budova.jpg0.0 ms26.8 KiB
www.autoskolanemec.cz/images/assets/logo.png0.0 ms25.4 KiB
www.autoskolanemec.cz/media/gantry5/engines/nucleus/css-compiled/bootstrap5.css0.0 ms23.7 KiB
/plugins/system/gdpr/assets/js/jquery.fancybox.min.js?e5d...0.0 ms19.5 KiB
www.autoskolanemec.cz/templates/g5_helium/custom/css/jluikit.min.css0.0 ms18.6 KiB
www.autoskolanemec.cz/media/gantry5/assets/js/main.js0.0 ms16.6 KiB
www.autoskolanemec.cz/media/system/css/joomla-fontawesome.min.css0.0 ms15.6 KiB
/plugins/system/gdpr/assets/js/cookieconsent.min.js?e5d29...0.0 ms13.3 KiB
www.autoskolanemec.cz/media/gantry5/assets/css/font-awesome5-all.min.css0.0 ms12.8 KiB
www.autoskolanemec.cz/templates/g5_helium/custom/css-compiled/helium_13.css0.0 ms9.7 KiB
/templates/g5_helium/custom/css-compiled/helium-joomla_13...0.0 ms7.2 KiB
/plugins/system/gdpr/assets/js/init.js?e5d29c0557269a8c5f...0.0 ms6.0 KiB
/plugins/system/gdpr/assets/css/cookieconsent.min.css?e5d...0.0 ms5.6 KiB
www.autoskolanemec.cz/templates/g5_helium/custom/css-compiled/custom_13.css0.0 ms5.2 KiB
www.autoskolanemec.cz/media/gantry5/engines/nucleus/css-compiled/nucleus.css0.0 ms4.5 KiB
www.autoskolanemec.cz/media/gantry5/assets/css/font-awesome5-shim.min.css0.0 ms4.5 KiB
/plugins/system/gdpr/assets/css/jquery.fancybox.min.css?e...0.0 ms3.8 KiB
/media/system/js/core.min.js?17121a112ecec3d656efe5c5f493...0.0 ms3.3 KiB
/media/system/js/messages.min.js?7425e8d1cb9e4f061d5e3027...0.0 ms2.0 KiB
/plugins/system/jce/css/content.css?badb4208be409b1335b81...0.0 ms1.4 KiB
/media/vendor/joomla-custom-elements/css/joomla-alert.min...0.0 ms1.3 KiB

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.

URLEst Savings
www.autoskolanemec.cz/media/gantry5/assets/webfonts/fa-brands-400.woff280 ms
www.autoskolanemec.cz/media/gantry5/assets/webfonts/fa-solid-900.woff240 ms

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
Nabídka Výcvik řidičů skupiny B Kondiční jízdy Individuální výcvik Školení začí… body.gantry > div#g-page-surround > section#g-features
www.autoskolanemec.cz/images/assets/background.png1.6 MiB1.2 MiB
div#jlgallery-5754 > div > div.jl-light > img.tm-image div#jlgallery-5754 > div > div.jl-light > img.tm-image
www.autoskolanemec.cz/images/assets/photo3.png1.1 MiB1.1 MiB
div#jlgallery-5754 > div > div.jl-light > img.tm-image div#jlgallery-5754 > div > div.jl-light > img.tm-image
www.autoskolanemec.cz/images/assets/photo2.png1.0 MiB1.0 MiB
div#jlgallery-5754 > div.jl-first-column > div.jl-light > img.tm-image div#jlgallery-5754 > div.jl-first-column > div.jl-light > img.tm-image
www.autoskolanemec.cz/images/assets/photo1.png1.0 MiB1.0 MiB
Ceník   B - osobní automobil   22 800 Kč  B - osobní automobil rychlokurz  26 8… body.gantry > div#g-page-surround > section#g-testimonials
www.autoskolanemec.cz/images/assets/fon.png452.7 KiB385.2 KiB
trenažéry div#jlgallery-5754 > div.jl-grid-margin > div.jl-light > img.tm-image
www.autoskolanemec.cz/images/assets/trenazer.jpg231.8 KiB224.1 KiB
trénink řízení div#jlgallery-5754 > div.jl-grid-margin > div.jl-light > img.tm-image
www.autoskolanemec.cz/images/assets/trenazery2.jpg179.7 KiB173.7 KiB
div#mod-custom113 > div.header > div.photoautoheader > img div#mod-custom113 > div.header > div.photoautoheader > img
www.autoskolanemec.cz/images/assets/autoheader.png181.8 KiB141.1 KiB
učebna div#jlgallery-5754 > div.jl-grid-margin > div.jl-light > img.tm-image
www.autoskolanemec.cz/images/assets/ucebna2.jpg130.6 KiB123.4 KiB
auto fabia div.col > div.com-content-article > figure.terminy-image-car > img
www.autoskolanemec.cz/images/assets/auto2.png120.8 KiB95.3 KiB
div.g-block > div#logo-9608-particle > a.g-logo > img div.g-block > div#logo-9608-particle > a.g-logo > img
www.autoskolanemec.cz/images/assets/logo.png25.1 KiB23.6 KiB
div.moduletable > div#mod-custom116 > div.budova > img div.moduletable > div#mod-custom116 > div.budova > img
www.autoskolanemec.cz/images/assets/budova.jpg26.5 KiB8.1 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-7-IMG
nodeLabel: div#mod-custom113 > div.header > div.photoautoheader > img
path: 1,HTML,1,BODY,3,DIV,3,HEADER,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,IMG
selector: div#mod-custom113 > div.header > div.photoautoheader > img
snippet: <img src="/images/assets/autoheader.png" alt="" width="700" height="600">

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLProtocol
www.autoskolanemec.cz/http/1.1
/media/vendor/joomla-custom-elements/css/joomla-alert.min...http/1.1
/plugins/system/gdpr/assets/css/cookieconsent.min.css?e5d...http/1.1
/plugins/system/gdpr/assets/css/jquery.fancybox.min.css?e...http/1.1
/plugins/system/jce/css/content.css?badb4208be409b1335b81...http/1.1
www.autoskolanemec.cz/templates/g5_helium/custom/css/jluikit.min.csshttp/1.1
www.autoskolanemec.cz/media/gantry5/engines/nucleus/css-compiled/nucleus.csshttp/1.1
www.autoskolanemec.cz/templates/g5_helium/custom/css-compiled/helium_13.csshttp/1.1
www.autoskolanemec.cz/media/gantry5/engines/nucleus/css-compiled/bootstrap5.csshttp/1.1
www.autoskolanemec.cz/media/system/css/joomla-fontawesome.min.csshttp/1.1
www.autoskolanemec.cz/media/gantry5/assets/css/font-awesome5-all.min.csshttp/1.1
www.autoskolanemec.cz/media/gantry5/assets/css/font-awesome5-shim.min.csshttp/1.1
/templates/g5_helium/custom/css-compiled/helium-joomla_13...http/1.1
www.autoskolanemec.cz/templates/g5_helium/custom/css-compiled/custom_13.csshttp/1.1
/media/system/js/core.min.js?17121a112ecec3d656efe5c5f493...http/1.1
/media/system/js/messages.min.js?7425e8d1cb9e4f061d5e3027...http/1.1
www.autoskolanemec.cz/media/vendor/jquery/js/jquery.min.js?3.6.0http/1.1
/plugins/system/gdpr/assets/js/jquery.fancybox.min.js?e5d...http/1.1
/plugins/system/gdpr/assets/js/cookieconsent.min.js?e5d29...http/1.1
/plugins/system/gdpr/assets/js/init.js?e5d29c0557269a8c5f...http/1.1
www.autoskolanemec.cz/templates/g5_helium/custom/js/jluikit.min.jshttp/1.1
www.autoskolanemec.cz/images/assets/logo.pnghttp/1.1
www.autoskolanemec.cz/images/assets/autoheader.pnghttp/1.1
www.autoskolanemec.cz/images/assets/budova.jpghttp/1.1
www.autoskolanemec.cz/images/assets/photo1.pnghttp/1.1
www.autoskolanemec.cz/images/assets/photo2.pnghttp/1.1
www.autoskolanemec.cz/images/assets/photo3.pnghttp/1.1
www.autoskolanemec.cz/images/assets/trenazer.jpghttp/1.1
www.autoskolanemec.cz/images/assets/ucebna2.jpghttp/1.1
www.autoskolanemec.cz/images/assets/trenazery2.jpghttp/1.1
www.autoskolanemec.cz/media/gantry5/assets/js/main.jshttp/1.1
www.autoskolanemec.cz/images/assets/background.pnghttp/1.1
www.autoskolanemec.cz/images/assets/fon.pnghttp/1.1
www.autoskolanemec.cz/media/gantry5/assets/webfonts/fa-solid-900.woff2http/1.1
www.autoskolanemec.cz/images/assets/auto2.pnghttp/1.1
www.autoskolanemec.cz/media/gantry5/assets/webfonts/fa-brands-400.woff2http/1.1

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.autoskolanemec.cz/media/vendor/jquery/js/jquery.min.js?3.6.030.5 KiB123 ms
www.autoskolanemec.cz/templates/g5_helium/custom/js/jluikit.min.js28.4 KiB123 ms
/media/system/js/core.min.js?17121a112ecec3d656efe5c5f493...3.3 KiB
www.autoskolanemec.cz/templates/g5_helium/custom/css-compiled/custom_13.css5.2 KiB
www.autoskolanemec.cz/media/gantry5/engines/nucleus/css-compiled/bootstrap5.css23.7 KiB163 ms
/templates/g5_helium/custom/css-compiled/helium-joomla_13...7.2 KiB83 ms
www.autoskolanemec.cz/media/gantry5/assets/css/font-awesome5-shim.min.css4.5 KiB
www.autoskolanemec.cz/media/gantry5/assets/css/font-awesome5-all.min.css12.8 KiB83 ms
www.autoskolanemec.cz/templates/g5_helium/custom/css/jluikit.min.css18.6 KiB203 ms
www.autoskolanemec.cz/media/system/css/joomla-fontawesome.min.css15.6 KiB123 ms
www.autoskolanemec.cz/templates/g5_helium/custom/css-compiled/helium_13.css9.7 KiB83 ms
www.autoskolanemec.cz/media/gantry5/engines/nucleus/css-compiled/nucleus.css4.5 KiB123 ms
/plugins/system/jce/css/content.css?badb4208be409b1335b81...1.4 KiB123 ms
/plugins/system/gdpr/assets/css/jquery.fancybox.min.css?e...3.8 KiB123 ms
/plugins/system/gdpr/assets/css/cookieconsent.min.css?e5d...5.6 KiB123 ms
/media/vendor/joomla-custom-elements/css/joomla-alert.min...1.3 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 3.1 KiB
URLTransfer SizeEst Savings
www.autoskolanemec.cz/media/gantry5/engines/nucleus/css-compiled/bootstrap5.css23.7 KiB3.1 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.

Estimated savings: 80 ms 68.8 KiB
URLTransfer SizeEst Savings
www.autoskolanemec.cz/media/gantry5/engines/nucleus/css-compiled/bootstrap5.css23.4 KiB23.2 KiB
www.autoskolanemec.cz/templates/g5_helium/custom/css/jluikit.min.css18.3 KiB18.0 KiB
www.autoskolanemec.cz/media/system/css/joomla-fontawesome.min.css15.3 KiB15.1 KiB
www.autoskolanemec.cz/media/gantry5/assets/css/font-awesome5-all.min.css12.5 KiB12.4 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
www.autoskolanemec.cz/images/assets/background.png1.6 MiB
www.autoskolanemec.cz/images/assets/photo3.png1.1 MiB
www.autoskolanemec.cz/images/assets/photo2.png1.0 MiB
www.autoskolanemec.cz/images/assets/photo1.png1.0 MiB
www.autoskolanemec.cz/images/assets/fon.png453.0 KiB
www.autoskolanemec.cz/images/assets/trenazer.jpg232.1 KiB
www.autoskolanemec.cz/images/assets/autoheader.png182.1 KiB
www.autoskolanemec.cz/images/assets/trenazery2.jpg180.0 KiB
www.autoskolanemec.cz/images/assets/ucebna2.jpg130.8 KiB
www.autoskolanemec.cz/images/assets/auto2.png121.1 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
div.g-block > div#logo-9608-particle > a.g-logo > img div.g-block > div#logo-9608-particle > a.g-logo > img
www.autoskolanemec.cz/images/assets/logo.png

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: 202 ms
URLTime Spent
autoskolanemec.cz/202 ms
www.autoskolanemec.cz/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: 700 ms
URLTime Spent
www.autoskolanemec.cz/800 ms
●Layout shift culprits
●Optimize DOM size
●Forced reflow
●LCP breakdown
●Optimize viewport for mobile
●Time to Interactive 1.1 s
●Max Potential First Input Delay 20 ms
●Minify JavaScript
●Reduce unused JavaScript
●JavaScript execution time 0.0 s
●Minimizes main-thread work 0.4 s
●Avoid non-composited animations 1 animated element found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 40 ms
●Server Backend Latencies 0 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
○INP breakdown
○User Timing marks and measures
○Avoid long main-thread tasks
○Avoid large layout shifts
89

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.

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
PŘIHLÁŠENÍ PROSÍM PROVÁDĚJTE POUZE TELEFONICKY ČI E-MAILEM div#mod-custom110 > p > strong > span
Facebook stránka Autoškoly Josef Němec div.footer-wrap > div.footer-wrap-1 > div.footer-section > a
Kontakt div.footer-wrap > div.footer-wrap-1 > div.footer-section > h4
Autoškola Němec Josef div.footer-wrap > div.footer-wrap-1 > div.footer-section > span
+420 602 119 011 div.footer-wrap > div.footer-wrap-1 > div.footer-section > a
nemec.as.cb@volny.cz div.footer-wrap > div.footer-wrap-1 > div.footer-section > a
J. Štursy 36 div.footer-wrap > div.footer-wrap-1 > div.footer-section > p
370 10 České Budějovice div.footer-wrap > div.footer-wrap-1 > div.footer-section > p
Navigace div.footer-wrap > div.footer-wrap-1 > div.footer-section > h4
Domů div.footer-wrap > div.footer-wrap-1 > div.footer-section > a
O nás div.footer-wrap > div.footer-wrap-1 > div.footer-section > a
Nabídka div.footer-wrap > div.footer-wrap-1 > div.footer-section > a
Termíny zahájení div.footer-wrap > div.footer-wrap-1 > div.footer-section > a
Školení řidičů div.footer-wrap > div.footer-wrap-1 > div.footer-section > a
Fotogalerie div.footer-wrap > div.footer-wrap-1 > div.footer-section > a
Ceník div.footer-wrap > div.footer-wrap-1 > div.footer-section > a
Ke stažení div.footer-wrap > div.footer-wrap-1 > div.footer-section > a
Kontakt div.footer-wrap > div.footer-wrap-1 > div.footer-section > a

These are opportunities to improve the legibility of your content.

Names and labels

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.g-block > div#custom-1299-particle > div.container > iframe div.g-block > div#custom-1299-particle > div.container > iframe

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.g-grid > div.g-block > div#logo-9608-particle > a.g-logo div.g-grid > div.g-block > div#logo-9608-particle > a.g-logo

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

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
Kontakt div.footer-wrap > div.footer-wrap-1 > div.footer-section > h4

These are opportunities to improve keyboard navigation in your application.

Screen readers have features to make navigating tables easier. Ensuring that `<td>` elements in a large table (3 or more cells in width and height) have an associated table header may improve the experience for screen reader users. Learn more about table headers.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
08.09 2026 16:00        KURZ JE OBSAZEN A UZAVŘEN 12.11 2026 16:00        KURZ … div.col > div.com-content-article > div.com-content-article__body > table
○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
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[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
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●Elements use only permitted ARIA attributes
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links are distinguishable without relying on color.
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Touch targets have sufficient size and spacing.
●Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`[accesskey]` values are unique
○`[aria-hidden="true"]` elements do not contain focusable descendents
○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
○Buttons have an accessible name
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Identical links have the same purpose.
○Elements with visible text labels have matching accessible names.
92

Best Practices

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLAspect Ratio (Displayed)Aspect Ratio (Actual)
logo div.footer-wrap > div.footer-wrap-1 > div.footer-section > img
www.autoskolanemec.cz/images/assets/logo.png150 x 100 (1.50)300 x 174 (1.72)

General

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
autoskolanemec-cz.svethostingu-tmp.cz/images/assets/Rectangle%202.png
Failed to load resource: net::ERR_CERT_COMMON_NAME_INVALID
●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
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Ensure proper origin isolation with COOP
○Mitigate clickjacking with XFO or CSP
83

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

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

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.

Crawling and Indexing

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
Technické div.cc-window > div.cc-checkboxes-container > div.cc-checkbox-container > a.cc-link
Funkční div.cc-window > div.cc-checkboxes-container > div.cc-checkbox-container > a.cc-link
Analytické div.cc-window > div.cc-checkboxes-container > div.cc-checkbox-container > a.cc-link
Marketingové div.cc-window > div.cc-checkboxes-container > div.cc-checkbox-container > a.cc-link

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

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Page has successful HTTP status code
●Links have descriptive text
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
○Document has a valid `rel=canonical`

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