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HTML Conformance Checkers — WHATWG
<!DOCTYPE HTML> <html lang="en"> <meta charset="utf-8"> <title>HTML Conformance Checkers — WHATWG</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta name="theme-color" content="#3A7908"> <link rel="icon" crossorigin href="https://resources.whatwg.org/logo.svg"> <link rel="stylesheet" href="/style/shared.css"> <link rel="stylesheet" href="/style/subpages.css"> <header> <hgroup> <h1> <a href="/"> <img id="main-logo" crossorigin src="https://resources.whatwg.org/logo.svg" alt> WHATWG </a> </h1> <p>HTML Conformance Checkers</p> </hgroup> </header> <nav class="buttonish-links"> <a href="https://spec.whatwg.org/">Standards</a> <a href="/faq">FAQ</a> <a href="/policies">Policies</a> <a href="https://participate.whatwg.org/">Participate</a> </nav> <p>Here are the currently known online conformance checkers that track the <a href="https://html.spec.whatwg.org/multipage/">HTML Standard</a>:</p> <ul> <li> <p><a href="https://validator.w3.org/nu/">Nu Html Checker</a></p> <form method="get" action="https://validator.w3.org/nu/"><p><label>Address of page to check: <input type="url" name="doc" pattern="(?:(?:https?://.+)|(?:data:.+))?" title="Absolute URL (http, https or data only) of the document to be checked."></label> <input name="submit" value="Check" type="submit"></p></form> </li> </ul> <p>Please <a href="https://github.com/whatwg/whatwg.org/issues/new">let us know</a> if you are working on a conformance checker. <footer> <p><small>Copyright © WHATWG (Apple, Google, Mozilla, Microsoft). This work is licensed under a <a rel="license" href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.</small></p> </footer> <script> "use strict"; navigator.serviceWorker.register("/service-worker.js"); </script>