C — https://www.blablacar.fr

Site Health

Score: 70 / 100

Based on 8 categories, 0 sections

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.

Top Priorities (5)

Access-Control-Allow-Origin: * with credentials — critical misconfiguration

Security › CORS Configuration

Content-Security-Policy header is missing

Security › Security Headers

HSTS header is missing

Security › Security Headers

No Content-Security-Policy header found

Security › Content Security Policy

Certificate expires soon (29 days remaining)

Security › TLS & Certificates

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Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fwww.blablacar.fr)](https://beavercheck.com/results/f5fbebff-3d21-2fc2-ed7a-f8440d28b6d2)

HTML

<a href="https://beavercheck.com/results/f5fbebff-3d21-2fc2-ed7a-f8440d28b6d2"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fwww.blablacar.fr" alt="BeaverCheck Score"></a>

Image URL

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

100

Accessibility

100

Best Practices

100

SEO

Core Web Vitals

Key metrics that affect user experience.

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

2.22 s

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

16.05 s

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

2.04 s

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

0.010

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

6.20 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.

16.46 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

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

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

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

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

Request	Cache TTL	Transfer Size
cdn.blablacar.com/discover/bus/FR/reims-2.webp	3600.0 s	105.0 KiB
cdn.blablacar.com/discover/bus/FR/paris-2.webp	3600.0 s	84.4 KiB
/056c49dd-4442-400c-886a-bcd1e29dc2cd/loader.js?target=ww...	7200.0 s	46.4 KiB
ddome-tag.blablacar.com/tags.js	3600.0 s	42.7 KiB
try.abtasty.com/8c952bdd9cb88033ffef07632e185107.js	30.0 s	2.8 KiB
cdn.blablacar.com/didomi/blablacar-logo-2.svg	3600.0 s	2.3 KiB
www.blablacar.fr/browser-support	0.0 ms	81 B

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

	URL	Resource Size	Est Savings
Voyagez à Arles avec BlaBlaCar `div.kz4wo41z4 > div.kz4wo41m7 > div.kz4wo41m2 > img.zj5dd93`	cdn.blablacar.com/k/a/images/destination_FR_1510x822-2e0186ae82c442bc.webp	182.7 KiB	150.2 KiB
Bus vers Reims `div.rtz7ut0 > div._1krek2x0 > div._1krek2x1 > img.zj5dd91`	cdn.blablacar.com/discover/bus/FR/reims-2.webp	105.0 KiB	73.0 KiB
Utilisatrice BlaBlaCar qui enlasse sa soeur rencontrée par hasard dans un covoi… `div.kz4wo41z4 > div.kz4wo41m7 > div.kz4wo41m2 > img.zj5dd93`	cdn.blablacar.com/k/a/images/ugc_FR_1428x777-39da4253b8c38e64.webp	75.4 KiB	60.4 KiB
Bus vers Paris `div.rtz7ut0 > div._1krek2x0 > div._1krek2x1 > img.zj5dd91`	cdn.blablacar.com/discover/bus/FR/paris-2.webp	84.4 KiB	54.1 KiB
Les billets de trains SNCF disponibles sur l'appli BlaBlaCar `div.kz4wo41z4 > div.kz4wo41m7 > div.kz4wo41m2 > img.zj5dd93`	cdn.blablacar.com/k/a/images/whatsnew_FR_1103x601-72e7330368b813aa.webp	26.8 KiB	17.8 KiB

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.

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

title: Preconnected origins

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

title: Preconnect candidates

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

URL	Transfer Size	Duration
try.abtasty.com/8c952bdd9cb88033ffef07632e185107.js	2.8 KiB	851 ms
cdn.blablacar.com/k/a/6215.85b3da5d82c18cab.css	42.7 KiB	1.1 s
cdn.blablacar.com/k/a/seo-footer.d90a93946ef31873.chunk.css	632 B
cdn.blablacar.com/k/a/Home.75e998ce5769724a.chunk.css	2.6 KiB

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

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

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.

TTI

Diagnostics

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

Estimated savings: 150 ms 9.3 KiB

URL	Transfer Size	Est Savings
cdn.blablacar.com/k/a/6215.85b3da5d82c18cab.css	42.7 KiB	9.3 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.

Estimated savings: 300 ms 54.5 KiB

URL	Transfer Size	Est Savings
cdn.blablacar.com/k/a/6215.85b3da5d82c18cab.css	42.4 KiB	40.6 KiB
	16.9 KiB	13.9 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.

Estimated savings: 3.0 s 656.0 KiB

URL	Transfer Size	Est Savings
cdn.blablacar.com/k/a/6215.6f0cd314c52834b7.js	409.6 KiB	246.0 KiB
cdn.blablacar.com/k/a/index.59085c37e31fdd97.js	435.5 KiB	218.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-TVPFSZ	174.4 KiB	79.2 KiB
cdn.blablacar.com/k/a/6187.cab3118d515f4ea4.chunk.js	65.4 KiB	47.7 KiB
/sdk/c8e2e67c354c0d6dec2981e079061b37f6a1f337/modern/sdk....	89.5 KiB	44.4 KiB
try.abtasty.com/8c952bdd9cb88033ffef07632e185107/main.51be40c215b8bdf2eeec.js	45.9 KiB	20.4 KiB

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

URL	Total CPU Time	Script Evaluation	Script Parse
cdn.blablacar.com/k/a/6215.6f0cd314c52834b7.js	1.6 s	1.2 s	154 ms
cdn.blablacar.com/k/a/index.59085c37e31fdd97.js	865 ms	576 ms	272 ms
www.blablacar.fr/	759 ms	52 ms	7.2 ms
Unattributable	660 ms	101 ms	0.0 ms
ddome-tag.blablacar.com/tags.js	290 ms	252 ms	14 ms
www.googletagmanager.com/gtm.js?id=GTM-TVPFSZ	284 ms	230 ms	51 ms
/sdk/c8e2e67c354c0d6dec2981e079061b37f6a1f337/modern/sdk....	206 ms	168 ms	37 ms
/sdk/c8e2e67c354c0d6dec2981e079061b37f6a1f337/modern/ui-w...	204 ms	139 ms	22 ms
cdn.blablacar.com/k/a/intl-locale.4cdbb20b883ba444.chunk.js	183 ms	172 ms	6.4 ms
cdn.blablacar.com/k/a/9245.708db02cfe26ed36.chunk.js	178 ms	128 ms	25 ms
cdn.blablacar.com/k/a/6187.cab3118d515f4ea4.chunk.js	154 ms	116 ms	22 ms
cdn.blablacar.com/k/a/kairos-translations_fr-FR.47d8fa050c9ac1c0.chunk.js	122 ms	65 ms	55 ms
try.abtasty.com/8c952bdd9cb88033ffef07632e185107/main.51be40c215b8bdf2eeec.js	88 ms	62 ms	25 ms

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

Category	Time Spent
Script Evaluation	3.4 s
Other	890 ms
Script Parsing & Compilation	774 ms
Style & Layout	300 ms
Rendering	181 ms
Garbage Collection	176 ms
Parse HTML & CSS	70 ms

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

	URL
Logo `div.didomi-popup-container > div.didomi-popup-view > div.didomi-popup-notice-logo-container > img.didomi-popup-notice-logo`	cdn.blablacar.com/didomi/blablacar-logo-2.svg
div.rx4q520 > div.kz4wo41m2 > div._9heuur0 > img._174ntao0 `div.rx4q520 > div.kz4wo41m2 > div._9heuur0 > img._174ntao0`	cdn.blablacar.com/k/a/images/train-ddad23818cd7909f.svg

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

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify JavaScript

●Avoids enormous network payloads Total size was 2,425 KiB

●User Timing marks and measures 3 user timings

●Avoid long main-thread tasks 17 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 80 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 20 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○LCP request discovery

○Avoid non-composited animations

100

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.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Failing Elements
Customize cookie settings `div.didomi-popup-container > div.didomi-popup-view > div#buttons > button#didomi-notice-learn-more-button`
Reject all `div.didomi-popup-container > div.didomi-popup-view > div#buttons > button#didomi-notice-disagree-button`
Accept and continue `div.didomi-popup-container > div.didomi-popup-view > div#buttons > button#didomi-notice-agree-button`
Metz 6,99 € `div.kz4wo41z4 > ul > li > a.gk14de1`
Nancy 5,49 € `div.kz4wo41z4 > ul > li > a.gk14de1`
Chessy 2,99 € `div.kz4wo41z4 > ul > li > a.gk14de1`
Paris - Aéroport Roissy CDG 6,99 € `div.kz4wo41z4 > ul > li > a.gk14de1`
Lyon 11,99 € `div.kz4wo41z4 > ul > li > a.gk14de1`
Metz 9,99 € `div.kz4wo41z4 > ul > li > a.gk14de1`
Bruxelles 9,99 € `div.kz4wo41z4 > ul > li > a.gk14de1`
Genève 22,99 € `div.kz4wo41z4 > ul > li > a.gk14de1`

○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

●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.

●`[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

●Touch targets have sufficient size and spacing.

●`[lang]` attributes have a valid value

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●All heading elements contain content.

●Uses ARIA roles only on compatible elements

○`[accesskey]` values are unique

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

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

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

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

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

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

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

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

○ARIA IDs are unique

○No form fields have multiple labels

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

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

○Input buttons have discernible text.

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

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

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

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

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

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

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

○Identical links have the same purpose.

○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

●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

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

100

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.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

100

Accessibility

Best Practices

100

SEO

Core Web Vitals

Key metrics that affect user experience. — Desktop

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

640 ms

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

1.11 s

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

162 ms

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

0.334

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

1.83 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.

2.88 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

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

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

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

Request	Cache TTL	Transfer Size
cdn.blablacar.com/discover/bus/FR/reims-2.webp	3600.0 s	105.0 KiB
cdn.blablacar.com/discover/bus/FR/lyon-3.webp	3600.0 s	86.4 KiB
cdn.blablacar.com/discover/bus/FR/paris-2.webp	3600.0 s	84.4 KiB
/056c49dd-4442-400c-886a-bcd1e29dc2cd/loader.js?target=ww...	7200.0 s	46.4 KiB
ddome-tag.blablacar.com/tags.js	3600.0 s	42.7 KiB
/captcha/assets/set/69f59c273b6e669ac32a6dd5e1b2cb63333d8...	0.0 ms	17.4 KiB
static.captcha-delivery.com/common/fonts/open-sans/open-sans.woff2	0.0 ms	16.8 KiB
static.captcha-delivery.com/common/fonts/open-sans/open-sans-300.woff2	0.0 ms	16.8 KiB
try.abtasty.com/8c952bdd9cb88033ffef07632e185107.js	30.0 s	2.8 KiB
cdn.blablacar.com/didomi/blablacar-logo-2.svg	3600.0 s	2.3 KiB
/captcha/assets/tpl/6dc485c0c428c35b53577b146dc6f9179f55e...	0.0 ms	1.8 KiB
static.captcha-delivery.com/common/fonts/open-sans/font-face.css	0.0 ms	1.2 KiB
www.blablacar.fr/browser-support	0.0 ms	81 B

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

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

items: [map[node:map[type:text value:Total] score:0.334149] map[score:0.314106 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:0 height:0 left:0 right:0 top:0 width:0] lhId:page-3-META nodeLabel:head > meta path:1,HTML,0,HEAD,4,META selector:head > meta snippet:<meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"> type:node]]] type:subitems]] map[score:0.017006 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:0 height:0 left:0 right:0 top:0 width:0] lhId:page-3-META nodeLabel:head > meta path:1,HTML,0,HEAD,4,META selector:head > meta snippet:<meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"> type:node]] map[cause:Web font extra:map[type:url value:https://static.captcha-delivery.com/common/fonts/open-sans/open-sans.woff2]]] type:subitems]] map[node:map[boundingRect:map[bottom:1562 height:758 left:0 right:1350 top:804 width:1350] lhId:page-0-SECTION nodeLabel:Le meilleur (prix) en bus Paris Reims Dès 4,99 € Bus de Paris à Reims Reims … path:1,HTML,1,BODY,3,DIV,1,MAIN,0,DIV,3,DIV,1,SECTION selector:main._15r81bz0 > div._14ur0pv1 > div > section.kz4wo4fz snippet:<section data-testid="ab-top-axis-section" class="kz4wo4fz kz4wo420n kz4wo4267 kz4wo4230 kz4wo423u"> type:node] score:0.003026] map[score:1.1e-05 subItems:map[items:[map[cause:Unsized image element] map[cause:Web font extra:map[type:url value:https://static.captcha-delivery.com/common/fonts/open-sans/open-sans-300.woff2]]] type:subitems]]]

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.

URL	Est Savings
static.captcha-delivery.com/common/fonts/open-sans/open-sans-300.woff2	65 ms
static.captcha-delivery.com/common/fonts/open-sans/open-sans.woff2	40 ms

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.

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

items: [map[reflowTime:9.286 source:map[column:10385 line:1 type:source-location url:https://sdk.privacy-center.org/sdk/c8e2e67c354c0d6dec2981e079061b37f6a1f337/modern/ui-web-en-web.c8e2e67c354c0d6dec2981e079061b37f6a1f337.js urlProvider:network]] map[reflowTime:2.729 source:map[type:text value:[unattributed]]]]

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

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.

title: Preconnected origins

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

title: Preconnect candidates

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.

URL	Transfer Size	Duration
try.abtasty.com/8c952bdd9cb88033ffef07632e185107.js	2.8 KiB	303 ms
cdn.blablacar.com/k/a/6215.85b3da5d82c18cab.css	43.0 KiB	315 ms
cdn.blablacar.com/k/a/Home.75e998ce5769724a.chunk.css	2.2 KiB
cdn.blablacar.com/k/a/seo-footer.d90a93946ef31873.chunk.css	631 B

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

	URL	Resource Size	Est Savings
Voyagez à Arles avec BlaBlaCar `div.kz4wo41z4 > div.kz4wo41m7 > div.kz4wo41m2 > img.zj5dd93`	cdn.blablacar.com/k/a/images/destination_FR_755x411-8e3332f16f8f22e6.webp	56.0 KiB	22.9 KiB
head > meta `head > meta`	/captcha/assets/set/69f59c273b6e669ac32a6dd5e1b2cb63333d8...	17.0 KiB	15.6 KiB

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

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

Element	Layout shift score
	0.314
	0.017
Le meilleur (prix) en bus Paris Reims Dès 4,99 € Bus de Paris à Reims Reims … `main._15r81bz0 > div._14ur0pv1 > div > section.kz4wo4fz`	0.003
	0.000

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.

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.

TTI

Diagnostics

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

Estimated savings: 40 ms 54.6 KiB

URL	Transfer Size	Est Savings
cdn.blablacar.com/k/a/6215.85b3da5d82c18cab.css	42.4 KiB	40.3 KiB
	16.9 KiB	14.3 KiB

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

Estimated savings: 0.0 ms 9.3 KiB

URL	Transfer Size	Est Savings
cdn.blablacar.com/k/a/6215.85b3da5d82c18cab.css	43.0 KiB	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.

Estimated savings: 0.0 ms 657.9 KiB

URL	Transfer Size	Est Savings
cdn.blablacar.com/k/a/6215.6f0cd314c52834b7.js	409.6 KiB	249.1 KiB
cdn.blablacar.com/k/a/index.59085c37e31fdd97.js	435.5 KiB	218.2 KiB
www.googletagmanager.com/gtm.js?id=GTM-TVPFSZ	174.4 KiB	79.2 KiB
cdn.blablacar.com/k/a/6187.cab3118d515f4ea4.chunk.js	65.4 KiB	47.7 KiB
/sdk/c8e2e67c354c0d6dec2981e079061b37f6a1f337/modern/sdk....	89.5 KiB	43.2 KiB
try.abtasty.com/8c952bdd9cb88033ffef07632e185107/main.51be40c215b8bdf2eeec.js	45.9 KiB	20.4 KiB

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

	URL
Logo `div.didomi-popup-container > div.didomi-popup-view > div.didomi-popup-notice-logo-container > img.didomi-popup-notice-logo`	cdn.blablacar.com/didomi/blablacar-logo-2.svg
div.rx4q520 > div.kz4wo41m2 > div._9heuur0 > img._174ntao0 `div.rx4q520 > div.kz4wo41m2 > div._9heuur0 > img._174ntao0`	cdn.blablacar.com/k/a/images/train-ddad23818cd7909f.svg

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

●Document request latency

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify JavaScript

●Avoids enormous network payloads Total size was 2,576 KiB

●User Timing marks and measures 3 user timings

●JavaScript execution time 0.8 s

●Minimizes main-thread work 1.6 s

●Avoid long main-thread tasks 2 long tasks found

●Avoid non-composited animations 2 animated elements found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 70 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 20 ms

○INP breakdown

100

Accessibility

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Failing Elements
Customize cookie settings `div.didomi-popup-container > div.didomi-popup-view > div#buttons > button#didomi-notice-learn-more-button`
Reject all `div.didomi-popup-container > div.didomi-popup-view > div#buttons > button#didomi-notice-disagree-button`
Accept and continue `div.didomi-popup-container > div.didomi-popup-view > div#buttons > button#didomi-notice-agree-button`

○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

●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.

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

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

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

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

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

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

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

●Links are distinguishable without relying on color.

●Links have a discernible name

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

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

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

●Touch targets have sufficient size and spacing.

●`[lang]` attributes have a valid value

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●All heading elements contain content.

●Uses ARIA roles only on compatible elements

○`[accesskey]` values are unique

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

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

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

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

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

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

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

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

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

○ARIA IDs are unique

○No form fields have multiple labels

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

○Input buttons have discernible text.

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

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

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

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

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

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

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

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

○Identical links have the same purpose.

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

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

Best Practices

General

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

Source	Description
edge.blablacar.fr/location/suggestions?query=	`Failed to load resource: the server responded with a status of 403 ()`
edge.blablacar.fr/location/suggestions?query=	`Failed to load resource: the server responded with a status of 403 ()`
edge.blablacar.fr/location/suggestions?query=	`Failed to load resource: the server responded with a status of 403 ()`
edge.blablacar.fr/search/form/v2?supply_choice_displayed=false	`Failed to load resource: the server responded with a status of 403 ()`
edge.blablacar.fr/location/suggestions?query=	`Failed to load resource: the server responded with a status of 403 ()`
edge.blablacar.fr/search/form/v2?supply_choice_displayed=false	`Failed to load resource: the server responded with a status of 403 ()`

●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 issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●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

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

100

SEO

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid

Browse & Analyze

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Results for https://www.blablacar.fr

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Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Best Practices

SEO

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

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