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href="https://es.wikipedia.org/wiki/Google_Lighthouse" title="Google Lighthouse – Spanish" lang="es" hreflang="es" data-title="Google Lighthouse" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Google_Lighthouse" title="Google Lighthouse – Indonesian" lang="id" hreflang="id" data-title="Google Lighthouse" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Google_Lighthouse" title="Google Lighthouse – Japanese" lang="ja" hreflang="ja" data-title="Google Lighthouse" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link 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<nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=Google_Lighthouse&redirect=no" class="mw-redirect" title="Google Lighthouse">Google Lighthouse</a>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Open-source, automated tool for measuring the quality of web pages</div> <p><b>Lighthouse</b> is an <a href="/wiki/Open-source" class="mw-redirect" title="Open-source">open-source</a>, automated tool for measuring the quality of <a href="/wiki/Web_page" title="Web page">web pages</a> developed by <a href="/wiki/Google" title="Google">Google</a>. It can be run against any web page, public or, requiring authentication. Lighthouse audits <a href="/wiki/Computer_performance" title="Computer performance">performance</a>, <a href="/wiki/Web_accessibility" title="Web accessibility">accessibility</a>, and <a href="/wiki/Search_engine_optimization" title="Search engine optimization">search engine optimization</a> factors of <a href="/wiki/Web_pages" class="mw-redirect" title="Web pages">web pages</a>,<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> this is the major difference from <a href="/wiki/Google_PageSpeed_Tools" title="Google PageSpeed Tools">Google PageSpeed</a>, Lighthouse provides more detail information. It also includes the ability to test <a href="/wiki/Progressive_web_app" title="Progressive web app">progressive web applications</a> for compliance with standards and best practices. Lighthouse aims to help <a href="/wiki/Web_developers" class="mw-redirect" title="Web developers">web developers</a>, the tool can be run by using Chrome <a href="/wiki/Browser_extension" title="Browser extension">browser extension</a> or by using terminal (command) for <a href="/wiki/Batch_processing" title="Batch processing">batch</a> auditing a list of URLs. Google's recommendation is for using the online version of <a rel="nofollow" class="external text" href="https://pagespeed.web.dev/">Page Speed Insights</a> as of 15th May 2015.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p><p>Lighthouse [Version 10 - May 2023] includes a metric for Progressive Web Applications to ensure that PWA's are fast and reliable, installable and optimised for modern 7th and 8th generation mobile technology.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>Lighthouse can audit webpage in desktop version and mobile version. In command mode (cmd in Windows), the developer is able to select the factors that need to be audited and other options by using the command line. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Google_Lighthouse_extension.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8c/Google_Lighthouse_extension.png/220px-Google_Lighthouse_extension.png" decoding="async" width="220" height="114" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8c/Google_Lighthouse_extension.png/330px-Google_Lighthouse_extension.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8c/Google_Lighthouse_extension.png/440px-Google_Lighthouse_extension.png 2x" data-file-width="1920" data-file-height="995" /></a><figcaption>Auditing wikipedia.org by this extension</figcaption></figure> <p>Recent versions of Lighthouse offer insights into how to optimize the Core Web Vitals metrics (which is one of the signals used by Google's algorithm to rank pages<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>), as announced by Google engineer Addy Osmani in 2021.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> As of now, Google uses three parameters to measure Core Web Vitals compliance, which are: </p> <ul><li>Largest Contentful Paint (<a rel="nofollow" class="external text" href="https://web.dev/lcp/">LCP</a>)</li> <li>Cumulative Layout Shift (<a rel="nofollow" class="external text" href="https://web.dev/cls/">CLS</a>)</li> <li>Total Blocking Time (<a rel="nofollow" class="external text" href="https://web.dev/tbt/">TBT</a>) as a proxy for First Input Delay (<a rel="nofollow" class="external text" href="https://web.dev/fid/">FID</a>)</li></ul> <p>On 10th May 2023,<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> Google announced that <a rel="nofollow" class="external text" href="https://web.dev/inp/">INP</a> will replace FID as the metric measuring responsiveness of a page. The move is aimed at getting a better handle on the total time taken for user interactions, rather than just the first interaction. These changes will start affecting page results from March 2024.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lighthouse_(software)&action=edit&section=1" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Google_PageSpeed_Tools" title="Google PageSpeed Tools">Google PageSpeed Tools</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lighthouse_(software)&action=edit&section=2" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.practicalecommerce.com/google-lighthouse-monitor-site-performance-seo-accessibility">"Google Lighthouse: Monitor Site Performance, SEO, Accessibility"</a>. 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Retrieved <span class="nowrap">2019-01-16</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Search+Engine+Journal&rft.atitle=Google+Releases+an+SEO+Tool+that+Measures+10+SEO+Metrics&rft.date=2018-02-06&rft_id=https%3A%2F%2Fwww.searchenginejournal.com%2Fchrome-lighthouse%2F235465%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALighthouse+%28software%29" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://developers.google.com/speed/pagespeed/insights_extensions">"PageSpeed Insights"</a>. <i>Google for Developers</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2023-08-29</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Google+for+Developers&rft.atitle=PageSpeed+Insights&rft_id=https%3A%2F%2Fdevelopers.google.com%2Fspeed%2Fpagespeed%2Finsights_extensions&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALighthouse+%28software%29" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://developer.chrome.com/en/docs/lighthouse/pwa/">"PWA Audits"</a>. <i>Google for Developers</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2023-10-18</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Google+for+Developers&rft.atitle=PWA+Audits&rft_id=https%3A%2F%2Fdeveloper.chrome.com%2Fen%2Fdocs%2Flighthouse%2Fpwa%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALighthouse+%28software%29" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://developers.google.com/search/docs/appearance/core-web-vitals">"Understanding Core Web Vitals and Google search results | Google Search Central | Documentation"</a>. <i>Google for Developers</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2023-08-29</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Google+for+Developers&rft.atitle=Understanding+Core+Web+Vitals+and+Google+search+results+%7C+Google+Search+Central+%7C+Documentation&rft_id=https%3A%2F%2Fdevelopers.google.com%2Fsearch%2Fdocs%2Fappearance%2Fcore-web-vitals&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALighthouse+%28software%29" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.dev/optimize-vitals-lighthouse/">"Optimizing Web Vitals using Lighthouse"</a>. <i>web.dev</i>. 2022-01-22<span class="reference-accessdate">. Retrieved <span class="nowrap">2022-04-08</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=web.dev&rft.atitle=Optimizing+Web+Vitals+using+Lighthouse&rft.date=2022-01-22&rft_id=https%3A%2F%2Fweb.dev%2Foptimize-vitals-lighthouse%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALighthouse+%28software%29" class="Z3988"></span></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://developers.google.com/search/blog/2023/05/introducing-inp">"Introducing INP to Core Web Vitals | Google Search Central Blog"</a>. <i>Google for Developers</i><span class="reference-accessdate">. Retrieved <span class="nowrap">2023-08-29</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Google+for+Developers&rft.atitle=Introducing+INP+to+Core+Web+Vitals+%7C+Google+Search+Central+Blog&rft_id=https%3A%2F%2Fdevelopers.google.com%2Fsearch%2Fblog%2F2023%2F05%2Fintroducing-inp&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALighthouse+%28software%29" class="Z3988"></span></span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://blog.cloudflare.com/inp-get-ready-for-the-new-core-web-vital/">"INP. Get ready for the new Core Web Vital"</a>. <i>The Cloudflare Blog</i>. 2023-06-20<span class="reference-accessdate">. Retrieved <span class="nowrap">2023-08-29</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=The+Cloudflare+Blog&rft.atitle=INP.+Get+ready+for+the+new+Core+Web+Vital&rft.date=2023-06-20&rft_id=http%3A%2F%2Fblog.cloudflare.com%2Finp-get-ready-for-the-new-core-web-vital%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALighthouse+%28software%29" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lighthouse_(software)&action=edit&section=3" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="official-website"><span class="url"><a rel="nofollow" class="external text" href="https://developers.google.com/web/tools/lighthouse/">Official 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