The Plain Fetch viewer
In short
The viewer requests a URL the way a plain-fetch agent does: no JavaScript, one request for HTML, one for markdown, one for llms.txt and one for a path that should not exist. It shows the initial HTML on the left, the readable text on the right, and seven flags underneath.
Pre-loaded with www.wikipedia.org, read 4 November 2026. Type any public URL to run your own.
The page answers a plain fetch: 3 of 6 checks found.
Initial HTML what a plain fetch receives
<!doctype html>
<html lang="en" class="theme-default typo-default">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
[... 52 more head elements folded ...]
<meta name="description" content="Web development for the rest of us"/>
[... 1 more head element folded ...]
<title>Svelte • Web development for the rest of us
</title>
[... 7 more head elements folded ...]
</head>
<body data-sveltekit-preload-data="hover">
<script>[... 409 characters folded ...]
</script>
<div style="height: 100%"><!--[--><!--[--><!--[0--><!--[-->
<div style="display: none">
<svg>[... 7,600 characters folded ...]
</svg>
</div><!----> <!--[-1--><!--]--> <!--[0--><a href="#main" class="svelte-1kjmc9y"><!--[-1-->Skip to main content<!--]--></a><!---->
<nav aria-label="Primary" class="svelte-wf8082 visible"><a class="home-link svelte-wf8082" href="/" title="Homepage" aria-label="Svelte"></a> <!--[-1--><!--]-->
<div class="desktop svelte-wf8082">
<div class="links svelte-wf8082"><!--[--><!--[0-->
<div class="dropdown svelte-fwukmr"><a href="/docs" class="svelte-wf8082">Docs
<svg width="20" height="20" class="svelte-hfc14b"><use href="#chevron-down"></use>
</svg><!----></a><!---->
<nav class="dropdown-content svelte-fwukmr">
<div class="hover-menu svelte-1ftqc6l"><!--[--><a class="secondary svelte-wf8082" href="/docs/svelte">Svelte</a><a class="secondary svelte-wf8082" href="/docs/kit">SvelteKit</a><a class="secondary svelte-wf8082" href="/docs/cli">CLI</a><a class="secondary svelte-wf8082" href="/docs/ai">AI</a><!--]--><!---->
</div><!---->
</nav>
</div><!--]--><!--[0-->
<div class="dropdown svelte-fwukmr"><a href="/playground" class="svelte-wf8082">Playground
<svg width="20" height="20" class="svelte-hfc14b"><use href="#chevron-down"></use>
</svg><!----></a><!---->
<nav class="dropdown-content svelte-fwukmr">
<div class="hover-menu svelte-1ftqc6l"><!--[--><a class="secondary svelte-wf8082" href="/playground">Create new app</a><a class="secondary svelte-wf8082" href="/apps">Your saved apps</a><!--]--><!---->
</div><!---->
</nav>
</div><!--]--><!--[-1--><a href="/tutorial" class="svelte-wf8082">Tutorial</a><!--]--><!--[-1--><a href="/packages" class="svelte-wf8082">Packages</a><!--]--><!--[-1--><a href="/blog" class="svelte-wf8082">Blog</a><!--]--><!--]-->
</div>
<div class="menu svelte-wf8082">
<form class="search-container svelte-curb4c" action="/search"><input value="" type="search" name="q" placeholder="Search" aria-label="Search" spellcheck="false" class="svelte-curb4c"/> <!--[-1--><!--]-->
</form><!---->
<div class="external-links svelte-wf8082"><a href="/chat" aria-label="Discord Chat" class="svelte-wf8082"><span data-icon="discord" class="svelte-wf8082"></span></a> <a href="https://bsky.app/profile/svelte.dev" aria-label="Svelte on Bluesky" class="svelte-wf8082"><span data-icon="bluesky" class="svelte-wf8082"></span></a> <a href="https://github.com/sveltejs" aria-label="GitHub Organization" class="svelte-wf8082"><span data-icon="github" class="svelte-wf8082"></span></a>
</div> <button class="raised svelte-ocz8b7" type="button" aria-pressed="false" aria-label="Toggle font"><span class="icon svelte-ocz8b7"></span></button><!----> <button class="raised" type="button" aria-pressed="false" aria-label="Toggle dark mode"><span class="icon svelte-16r4un1"></span></button><!---->
</div>
</div>
<div class="mobile mobile-menu svelte-wf8082"><button aria-label="Search" class="raised icon search">
<svg width="18" height="18" class="svelte-hfc14b"><use href="#search"></use>
</svg><!----></button> <button class="raised svelte-ocz8b7" type="button" aria-pressed="false" aria-label="Toggle font"><span class="icon svelte-ocz8b7"></span></button><!----> <button class="raised" type="button" aria-pressed="false" aria-label="Toggle dark mode"><span class="icon svelte-16r4un1"></span></button><!----> <button aria-label="Toggle menu" aria-expanded="false" class="menu-toggle raised icon">
<svg width="16" height="16" class="svelte-hfc14b"><use href="#menu"></use>
</svg><!----></button>
</div>
</nav> <!--[-1--><!--]--><!----><!--]--> <!--[-1--><!--]-->
<main id="main" class="svelte-1ftfg6q"><!--[--><!--[-1--><!--[-->
<div class="home svelte-1uha8ag">
<h1 class="visually-hidden">Svelte
</h1>
<div class="hero svelte-2ha69v">
<div class="hero-content svelte-2ha69v">
<h1 class="svelte-2ha69v">web development for the rest of us
</h1> <a href="/docs" class="cta svelte-2ha69v">get started
<svg width="20" height="20" class="svelte-hfc14b"><use href="#arrow-right"></use>
</svg><!----></a>
</div> <picture class="machine svelte-2ha69v"><source srcset="/_app/immutable/assets/svelte-machine-desktop.DBnHaUEt.avif 1200w, /_app/immutable/assets/svelte-machine-desktop.C2uKxdp4.avif 2000w, /_app/immutable/assets/svelte-machine-desktop.BNPzKCec.avif 2800w, /_a [... 136 characters folded ...]> <source srcset="/_app/immutable/assets/svelte-machine-desktop.DCAg8wBB.webp 1200w, /_app/immutable/assets/svelte-machine-desktop.BEI9SCAt.webp 2000w, /_app/immutable/assets/svelte-machine-desktop.CC0w6xf9.webp 2800w, /_a [... 136 characters folded ...]> <source srcset="/_app/immutable/assets/svelte-machine-desktop.CA2E5u2c.png 1200w, /_app/immutable/assets/svelte-machine-desktop.DNTYHfHY.png 2000w, /_app/immutable/assets/svelte-machine-desktop.CK1bubNM.png 2800w, /_app/ [... 131 characters folded ...]> <source srcset="/_app/immutable/assets/svelte-machine-mobile.B4WhlvSn.avif 960w" width="2208" height="936" type="image/avif"/> <source srcset="/_app/immutable/assets/svelte-machine-mobile.BI8uF_12.webp 960w" width="2208" height="936" type="image/webp"/> <source width="2208" height="936" type="image/png"/> <img alt="The Svelte compiler packaging up your component code" src="/_app/immutable/assets/svelte-machine-mobile.DtvNEgov.png" fetchpriority="high" class="svelte-2ha69v"/></picture>
</div><!---->
<div class="outer svelte-gb0gm7">
<p class="definition svelte-gb0gm7"><img class="pronunciation svelte-gb0gm7" alt="Svelte pronunciation guide" src="/_app/immutable/assets/svelte-pronunciation.DFRMnECz.svg" width="457" height="139"/> <span class="description svelte-gb0gm7"><span class="adjective svelte-gb0gm7"></span> attractively thin, graceful and stylish</span>
</p>
<div class="blurb svelte-gb0gm7">
<p>Svelte is a UI framework that uses a compiler to let you write breathtakingly concise
components that do minimal work in the browser, using languages you already know — HTML, CSS
and JavaScript. <strong>It’s a love letter to web development.</strong>
</p>
<p>But don’t take our word for it. Developers consistently rank Svelte as the framework they’re
most excited about using.
</p>
</div>
<div class="screenshots svelte-gb0gm7"><a href="https://survey.stackoverflow.co/2024/technology#2-web-frameworks-and-technologies" class="svelte-gb0gm7"><picture><source srcset="/_app/immutable/assets/stack-overflow.BVR0Cdju.avif 1200w" type="image/avif"/><source srcset="/_app/immutable/assets/stack-overflow.CcH-eC1I.webp 1200w" type="image/webp"/><img class="screenshot svelte-gb0gm7" alt="Stack Overflow 2024 Developer Survey" src="/_app/immutable/assets/stack-overflow.D6fScimS.png" width="1200" height="647"/></picture></a> <a href="https://2025.stateofjs.com/en-US/libraries/front-end-frameworks/" class="svelte-gb0gm7"><picture><source srcset="/_app/immutable/assets/state-of-js-chart.Dr89S1l7.avif 1000w" type="image/avif"/><source srcset="/_app/immutable/assets/state-of-js-chart.DlBeGvL8.webp 1000w" type="image/webp"/><img class="screenshot svelte-gb0gm7" alt="State of JavaScript 2025" src="/_app/immutable/assets/state-of-js-chart.VWzbG9sl.png" width="1000" height="515"/></picture></a>
</div>
</div><!---->
<div class="companies svelte-10v9vhs">
<div class="wing svelte-10v9vhs">
<div class="logos svelte-10v9vhs"><img class="logo svelte-10v9vhs" src="/_app/immutable/assets/mullvad.BoCDoRBI.svg" alt="Mullvad logo" width="1057" height="250"/> <img class="logo svelte-10v9vhs" src="data:image/svg+xml,%3c?xml%20version='1.0'%20encoding='UTF-8'?%3e%3csvg%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20956.43%20250.08'%3e%3cdefs%3e%3cstyle%3 [... 3962 characters folded ...]> <img class="logo svelte-10v9vhs" src="/_app/immutable/assets/yelp.BCIQykSN.svg" alt="Yelp logo" width="408" height="250"/> <img class="logo svelte-10v9vhs" src="data:image/svg+xml,%3c?xml%20version='1.0'%20encoding='UTF-8'?%3e%3csvg%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20660.71%20250.08'%3e%3cdefs%3e%3cstyle%3 [... 2416 characters folded ...]> <img class="logo svelte-10v9vhs" src="data:image/svg+xml,%3c?xml%20version='1.0'%20encoding='UTF-8'?%3e%3csvg%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20518.42%20250.08'%3e%3cdefs%3e%3cstyle%3 [... 2122 characters folded ...]>
</div>
</div>
<h2 class="svelte-10v9vhs">used by companies you’ve heard of
</h2>
<div class="wing svelte-10v9vhs">
<div class="logos svelte-10v9vhs"><img class="logo svelte-10v9vhs" src="data:image/svg+xml,%3c?xml%20version='1.0'%20encoding='UTF-8'?%3e%3csvg%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20659.01%20250.44'%3e%3cdefs%3e%3cstyle%3 [... 3926 characters folded ...]> <img class="logo svelte-10v9vhs" src="/_app/immutable/assets/nyt.WSBgWcyP.svg" alt="New York Times logo" width="1239" height="250"/> <img class="logo svelte-10v9vhs" src="data:image/svg+xml,%3c?xml%20version='1.0'%20encoding='UTF-8'?%3e%3csvg%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20547.28%20250.08'%3e%3cdefs%3e%3cstyle%3 [... 2080 characters folded ...]> <img class="logo svelte-10v9vhs" src="/_app/immutable/assets/decathlon.CsAZfh9C.svg" alt="Decathlon logo" width="789" height="250"/> <img class="logo svelte-10v9vhs" src="/_app/immutable/assets/1password.EAEOcf-b.svg" alt="1password logo" width="837" height="250"/>
</div>
</div>
</div><!---->
<section class="svelte-1rricuz">
<div class="inner svelte-1rricuz">
<figure>
<div class="video-player svelte-6bum2k"><video src="https://sveltejs.github.io/assets/svelte-origins-preview.mp4" loop="" playsinline="" class="svelte-6bum2k"><track kind="captions" srclang="en" src="data:text/vtt;base64,V0VCVlRUCgowMDowMDowMC4wMDAgLS0+IDAwOjAwOjAxLjkyMAogW1Njb3R0IFRvbGluc2tpXSBJIHdhbnRlZCB0byBzaGFyZSBpdCBpbW1lZGlhdGVseS4KCjAwOjAwOjAxLjkyMCAtLT4gMDA6MDA6MDQuMj [... 3269 characters folded ...]></video> <!--[-1--><!--]-->
<div class="top-controls svelte-6bum2k"><label class="captions svelte-6bum2k unused"><input class="visually-hidden svelte-6bum2k" type="checkbox" checked=""/> <img src="data:image/svg+xml,%3csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%2024%2024'%3e%3cpath%20d='M5%204c-.6%200-1%20.2-1.4.6C3.2%205%203%205.4%203%206v12c0%20.6.2%201%20.6%201.4.4.4.8.6%201.4.6h14c.5%2 [... 546 characters folded ...]> <img src="data:image/svg+xml,%3csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%2024%2024'%20fill='%23fff'%3e%3cpath%20d='m16.5%2013.5%201.2%201.2c.2-.2.3-.4.3-.7v-1h-1.5v.5zM10%2013h-.5v.5h-2v-3L6.3%209.3c-.2. [... 544 characters folded ...]></label> <label class="mute svelte-6bum2k unused"><input class="visually-hidden svelte-6bum2k" type="checkbox" checked=""/> <img src="data:image/svg+xml,%3csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%2024%2024'%3e%3cpath%20fill='white'%20d='M12,4L9.91,6.09L12,8.18M4.27,3L3,4.27L7.73,9H3V15H7L12,20V13.27L16.25,17.53C15.58,18.04%2 [... 415 characters folded ...]> <img src="data:image/svg+xml,%3csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%2024%2024'%3e%3cpath%20fill='white'%20d='M14,3.23V5.29C16.89,6.15%2019,8.83%2019,12C19,15.17%2016.89,17.84%2014,18.7V20.77C18,19.8 [... 227 characters folded ...]></label>
</div> <label class="play-pause svelte-6bum2k"><input class="visually-hidden svelte-6bum2k" type="checkbox"/> <img src="data:image/svg+xml,%3csvg%20width='24'%20height='24'%20viewBox='0%200%2024%2024'%20fill='none'%20xmlns='http://www.w3.org/2000/svg'%3e%3cpath%20d='M7.5%2011.9999V5.93774L12.75%208.96884L18%2011.9999L12.75%2015. [... 179 characters folded ...]> <img src="data:image/svg+xml,%3csvg%20width='24'%20height='24'%20viewBox='0%200%2024%2024'%20fill='none'%20xmlns='http://www.w3.org/2000/svg'%3e%3crect%20x='7'%20y='6'%20width='2'%20height='12'%20fill='white'%20stroke='w [... 260 characters folded ...]></label>
</div><!----> <figcaption class="svelte-1uha8ag"><a href="https://www.offerzen.com/community/svelte-origins-documentary">Watch the full Svelte Origins documentary</a></figcaption>
</figure><!---->
</div>
</section><!----> <svelte-css-wrapper style="display: contents; --max-width: 200rem;">
<section class="svelte-1rricuz">
<div class="inner svelte-1rricuz">
<h2 class="svelte-wu4rj6">join our friendly community
</h2>
<p class="svelte-wu4rj6">Our sister organisation, <a href="https://www.sveltesociety.dev/">Svelte Society</a>, organises
events around the globe. Find your chapter and join us in <a href="/chat">our Discord server</a>.
</p>
<figure class="svelte-wu4rj6"><picture><source srcset="/_app/immutable/assets/summit._WS1sncZ.avif 800w, /_app/immutable/assets/summit.mLm2suRx.avif 1200w, /_app/immutable/assets/summit.Bd2uC0Nw.avif 2000w, /_app/immutable/assets/summit.D2GK_EEa.avif 2800w, /_app/immutable/assets/summit.CbJIUEYB.avif 3886w" type="image/avif"/><source srcset="/_app/immutable/assets/summit.BCEEwIZz.webp 800w, /_app/immutable/assets/summit.Ibur6UHM.webp 1200w, /_app/immutable/assets/summit.fXpBx7y2.webp 2000w, /_app/immutable/assets/summit.BAgl9iRM.webp 2800w, /_app/immutable/assets/summit.DXZwuYfw.webp 3886w" type="image/webp"/><source srcset="/_app/immutable/assets/summit.CjVzCeiJ.png 800w, /_app/immutable/assets/summit.DI29YjIo.png 1200w, /_app/immutable/assets/summit.eaxDbsbJ.png 2000w, /_app/immutable/assets/summit.DjIfz5cW.png 2800w, /_app/immutable/assets/summit.CCzKB27v.png 3886w" type="image/png"/><img class="collage svelte-wu4rj6" src="/_app/immutable/assets/summit.CCzKB27v.png" alt="Photos by Marcel Cutts from the 2022 Svelte Summit in Stockholm" width="3886" height="1490"/></picture> <figcaption class="svelte-wu4rj6">Photos by <a href="https://marcel.gg/" class="svelte-wu4rj6">Marcel Cutts</a></figcaption>
</figure><!---->
</div>
</section><!----></svelte-css-wrapper><!---->
<p class="intro svelte-1sfg2rp">Backed by <a href="https://vercel.com" target="_blank" rel="noreferrer">Vercel</a> and countless donors,
developed by full-time and part-time maintainers, Svelte is here to stay.
</p>
<div class="wrapper svelte-1sfg2rp">
<div class="layout svelte-1sfg2rp">
<div class="supporters svelte-1sfg2rp"><!--[--><a class="supporter svelte-1sfg2rp" style="background-position: 0% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/Rich-Harris">Rich-Harris</a><a class="supporter svelte-1sfg2rp" style="background-position: 2.127659574468085% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/benmccann">benmccann</a><a class="supporter svelte-1sfg2rp" style="background-position: 4.25531914893617% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/jycouet">jycouet</a><a class="supporter svelte-1sfg2rp" style="background-position: 6.382978723404255% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/bluwy">bluwy</a><a class="supporter svelte-1sfg2rp" style="background-position: 8.51063829787234% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/dummdidumm">dummdidumm</a><a class="supporter svelte-1sfg2rp" style="background-position: 10.638297872340425% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/paoloricciuti">paoloricciuti</a><a class="supporter svelte-1sfg2rp" style="background-position: 12.76595744680851% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/Conduitry">Conduitry</a><a class="supporter svelte-1sfg2rp" style="background-position: 14.893617021276595% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/teemingc">teemingc</a><a class="supporter svelte-1sfg2rp" style="background-position: 17.02127659574468% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/manuel3108">manuel3108</a><a class="supporter svelte-1sfg2rp" style="background-position: 19.148936170212767% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/Nic-Polumeyv">Nic-Polumeyv</a><a class="supporter svelte-1sfg2rp" style="background-position: 21.27659574468085% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/jasonlyu123">jasonlyu123</a><a class="supporter svelte-1sfg2rp" style="background-position: 23.404255319148938% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/khromov">khromov</a><a class="supporter svelte-1sfg2rp" style="background-position: 25.53191489361702% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/trueadm">trueadm</a><a class="supporter svelte-1sfg2rp" style="background-position: 27.659574468085108% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/elliott-with-the-longest-name-on-github">elliott-with-the-longest-name-on-github</a><a class="supporter svelte-1sfg2rp" style="background-position: 29.78723404255319% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/AdrianGonz97">AdrianGonz97</a><a class="supporter svelte-1sfg2rp" style="background-position: 31.914893617021278% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/fehnomenal">fehnomenal</a><a class="supporter svelte-1sfg2rp" style="background-position: 34.04255319148936% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/jamesbirtles">jamesbirtles</a><a class="supporter svelte-1sfg2rp" style="background-position: 36.170212765957444% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/baseballyama">baseballyama</a><a class="supporter svelte-1sfg2rp" style="background-position: 38.297872340425535% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/tanhauhau">tanhauhau</a><a class="supporter svelte-1sfg2rp" style="background-position: 40.42553191489362% 0; background-image: url(/_app/immutable/assets/contributors.C6X8aCXx.webp);" href="https://github.com/ignatiusmb">ignatiusmb</a><a class="supporter svelte-1sfg2rp" style="background-position: 42.5531914893617% 0; 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Shown with 26 long blocks (scripts, styles, long tags) folded into a marker that says how many characters they hide; line breaks added before block tags because the source is minified; the pane stops after the first 200 words; the page is 89 KB.
Reading view the text a plain-fetch client can extract
title: Svelte • Web development for the rest of us
Svelte
Skip to main content Docs Svelte SvelteKit CLI AI Playground Create new app Your saved apps Tutorial Packages Blog Svelte web development for the rest of us get started attractively thin, graceful and stylish Svelte is a UI framework that uses a compiler to let you write breathtakingly concise components that do minimal work in the browser, using languages you already know — HTML, CSS and JavaScript. It’s a love letter to web development. But don’t take our word for it. Developers consistently rank Svelte as the framework they’re most excited about using. used by companies you’ve heard of Watch the full Svelte Origins documentary join our friendly community Our sister organisation, Svelte Society , organises events around the globe. Find your chapter and join us in our Discord server . Photos by Marcel Cutts Backed by Vercel and countless donors, developed by full-time and part-time maintainers, Svelte is here to stay. Rich-Harris benmccann jycouet bluwy dummdidumm paoloricciuti Conduitry teemingc manuel3108 Nic-Polumeyv jasonlyu123 khromov trueadm elliott-with-the-longest-name-on-github AdrianGonz97 fehnomenal jamesbirtles baseballyama tanhauhau ignatiusmb sacrosanctic maxlath orta 43081j PuruVJ gtm-nayan hyunbinseo rixo halfnelson ghostdevv Ocean-OS ehrencrona GrygrFlzr akiomik pushkine Kiwow 7nik antony jonasgeiler antfu Monkatraz theetherGit Swatinem pngwn erenbati asheerrizvi MathiasWP RaphaelFakhri
105 more words follow in the initial HTML.
| Check | Result | Detail |
|---|---|---|
| H1 in the initial HTML | Found 2 H1 elements | First H1: Svelte |
| First 200 words in the initial HTML | Found 200 of 200 words | The initial HTML carries 305 words of visible text; the first 200 are marked in the left pane. |
| llms.txt present and linked | Note present, not linked | 1676 bytes, 7 links. Structure grade A (6 of 6). Nothing on the home page points to it. Ora's lab found 86 percent of llms.txt fetches arrived through a link. |
| Markdown on request | Missing 200 text/html | Accept: text/markdown returned 200 with text/html; charset=utf-8. The server ignores the header. |
| Status of a made-up path | Found 404 | /agent-ready-html-missing-path-check returned 404: a real status code for a missing page. |
| JSON-LD types | Missing none | No JSON-LD block on the home page. Ora's lab found it made no difference when the answer was already in the HTML; Google says it is not needed for AI features. |
| OpenAPI link | Note none on the home page | No OpenAPI link on the home page. It matters only for a site that ships an API. |
Run the full check
The viewer read one page with four requests. The full check we recommend next is Ora's scan. Its Access layer runs 42 checks worth 30 of its 100 points, among them content without JavaScript, bot detection, llms.txt, markdown on request, JSON-LD and the sitemap (Ora's check catalogue, contract 1.38.0, read 5 November 2026). Open Ora's report for svelte.dev.
Limits: Ora reads public URLs only, says two runs of one scan land within a couple of points without publishing repeat-scan data, and keeps the product that fixes what it finds behind a waitlist. Cloudflare's scanner at isitagentready.com is a quick free alternative, and Mintlify's score covers documentation.
What the viewer does
It sends four plain GET requests with the user agent Mozilla/5.0 (compatible; agent-readiness-crawl/1.0): the URL itself, the same URL with Accept: text/markdown, /llms.txt on the same host, and a made-up path at the root. It runs no JavaScript. The left pane is the first bytes of the HTML as text, with long scripts and styles folded into a marker that says how many characters they hide. The H1 and the first 200 words of visible text are marked in both panes. The flags under the panes say what the four responses added up to.
Limits
- Ten seconds for all four requests together, 1.5 MB read from the home page, at most five redirects, each one checked again.
- http and https only, default ports only. Private, local and internal addresses and names are refused.
- Ten runs per address per minute. The counter lives in memory on the edge function, so it is per instance rather than global. Past ten you get a 429 with a Retry-After header.
- Results are cached for 24 hours by the response headers. Nothing is written to a database: the viewer keeps the first 200 words and the extracted fields for the length of the request and keeps no page body beyond that.
What it does not tell you
A plain fetch from this server is not a real agent. Bot protection weighs the source address more than the user agent, so a page that answers 200 here can still refuse an agent, and the reverse. Ora's lab found (2026-10-19) that returning 403 to agent user agents and hiding the answer in JavaScript were the only two of 19 configurations that stopped retrieval; the viewer can see the second, and can only hint at the first. The initial HTML reference covers both. The server logs and the published crawler address ranges settle the first.
The seven flags
- H1 in the initial HTML
- Whether the HTML the server sends already contains an H1. It is the cheapest sign that the page does not depend on scripts to say what it is.
- First 200 words in the initial HTML
- Whether at least 200 words of visible text arrive in the initial HTML. Under 40 words with an app root element is flagged as a JavaScript shell.
- llms.txt present and linked
- Whether /llms.txt answers with a plain-text file, whether the home page links it (an anchor, a link element or a Link header), and the structure grade the index uses.
- Markdown on request
- Whether a request with Accept: text/markdown comes back as text/markdown. Cloudflare Radar found 3.9 percent of scanned top sites passing this at its April 2026 launch.
- Status of a made-up path
- Whether a path that should not exist returns 404 or 410. A 200 is a soft 404 and reads as a live page.
- JSON-LD types
- The schema.org types found in JSON-LD blocks on the page. Ora's lab found JSON-LD made no difference when the answer was already in the HTML.
- OpenAPI link
- Whether the page links an OpenAPI file, by an anchor or a service-desc link relation. It matters only for a site that ships an API.
Sources
- Ora: AgentReady launch post (Ora's lab findings) https://ora.ai/blog/agentready-launch, read 4 November 2026
- Ora check catalogue, contract 1.38.0 (132 checks, 42 in the Access layer) https://ora.ai/api/checks, read 5 November 2026
- Ora home page (the fixing product is behind a waitlist) https://ora.ai/, read 5 November 2026
- Ora: Introducing Deep Scan (repeat scans) https://ora.ai/blog/introducing-deep-scan, read 5 November 2026
- Ora llms.txt (public URLs only) https://ora.ai/llms.txt, read 5 November 2026
- Vercel: Make your site readable by AI agents https://vercel.com/kb/guide/make-your-site-readable-by-ai-agents, read 4 November 2026
- llms.txt proposal (llmstxt.org) https://llmstxt.org/, read 4 November 2026
Last reviewed 5 November 2026