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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html lang="en"><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Website Quality Alerts</title> <meta name="referrer" content="unsafe-url"> <link rel="stylesheet" type="text/css" href="https://w3techs.com/s45.css"> <body> <script type="text/javascript"> var _paq = window._paq = window._paq || []; _paq.push(['trackPageView']); _paq.push(['enableLinkTracking']); (function() { var u="https://m.q-success.com/"; _paq.push(['setTrackerUrl', u+'mtp']); _paq.push(['setSiteId', '2']); var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; g.type='text/javascript'; g.async=true; g.src=u+'mtj'; s.parentNode.insertBefore(g,s); })(); </script> <noscript><p><img src="https://m.q-success.com/mtp?idsite=2&rec=1" style="border:0" alt=""></p></noscript> <div id=doc3> <div id=hd> <div id=hdl><a href="https://w3techs.com/"><img src="https://w3techs.com/logo1.gif" alt="W3Techs" width=150 height=50></a></div> <div id=hdc style="min-height:94px;height:auto;text-align:center"> <div class=banner><script>var _ama_pid=_ama_pid||Math.floor(Math.random()*2147483647);document.write('\x3Cscript src="https://b.w3techs.com/ajs/2/2/' + _ama_pid + '/' + encodeURIComponent(window.location) + '">\x3C/script>');</script></div><a class=no_und href="https://b.w3techs.com/">advertise here</a></div> <div id=hdr><b>provided by<br><a href="https://q-success.com/web_services">Q-Success</a></b></div> </div> <div id=mn> <a href="https://w3techs.com/">Home</a> <a href="https://w3techs.com/technologies">Technologies</a> <a href="https://w3techs.com/reports">Reports</a> <a href="https://w3techs.com/apidoc">API</a> <a href="https://w3techs.com/sites">Sites</a> <a href="https://w3techs.com/quality">Quality</a> <a href="https://w3techs.com/users">Users</a> <a href="https://w3techs.com/blog">Blog</a> <a href="https://w3techs.com/forum">Forum</a> <a href="https://w3techs.com/faq">FAQ</a> <a href="https://w3techs.com/search">Search</a> </div><div class=feat1><p>Featured products and services<a style="font-size:80%;font-weight:normal;position:absolute;right:1em;" href="https://b.w3techs.com/">advertise here</a></p><script>var _ama_pid=_ama_pid||Math.floor(Math.random()*2147483647);document.write('\x3Cscript src="https://b.w3techs.com/ajs/2/5/' + _ama_pid + '/' + encodeURIComponent(window.location) + '">\x3C/script>');</script></div><div id=bd><table class=tech><tr><td class=tech_sel> <td class=tech_main> <h1>Website Quality Alerts</h1> <p>Quality alerts indicate potential problems on websites. We identify and show these problems in the hope to provide a useful tool for webmasters to improve their sites. <p>We try not to duplicate information that can easily be found by other tools, such as HTML validators, however there will always be some overlap. Furthermore, we put some effort into verifying that an alert is likely to actually have any real impact. For example, we don't alert on a missing character encoding definition, when the page uses only ASCII characters. <p>This is an overview of all alerts. Click on the titles to get a description. <ul> <li><a class=no_und href="https://w3techs.com/quality/alert/10">Incorrect or uncommon character encoding name</a><li><a class=no_und href="https://w3techs.com/quality/alert/11">Incorrect character encoding defined</a><li><a class=no_und href="https://w3techs.com/quality/alert/12">Contradictory character encoding specifications</a><li><a class=no_und href="https://w3techs.com/quality/alert/13">Missing character encoding definition</a><li><a class=no_und href="https://w3techs.com/quality/alert/14">Unknown character encoding</a><li><a class=no_und href="https://w3techs.com/quality/alert/15">No character encoding defined</a><li><a class=no_und href="https://w3techs.com/quality/alert/20">Title declaration before character encoding declaration</a><li><a class=no_und href="https://w3techs.com/quality/alert/22">No title declaration</a><li><a class=no_und href="https://w3techs.com/quality/alert/30">No web page found at non-www url</a><li><a class=no_und href="https://w3techs.com/quality/alert/31">Incorrect server time</a><li><a class=no_und href="https://w3techs.com/quality/alert/40">Server error</a><li><a class=no_und href="https://w3techs.com/quality/alert/41">Homepage not found</a><li><a class=no_und href="https://w3techs.com/quality/alert/42">Website inaccessible</a><li><a class=no_und href="https://w3techs.com/quality/alert/50">Incorrect content language code</a><li><a class=no_und href="https://w3techs.com/quality/alert/51">Unknown content language specification</a><li><a class=no_und href="https://w3techs.com/quality/alert/52">Country code used for content language specification</a><li><a class=no_und href="https://w3techs.com/quality/alert/53">More than one text-processing content language defined</a><li><a class=no_und href="https://w3techs.com/quality/alert/54">Contradictory content language specifications</a><td class=tech_add> </table> </div> <div id=ft> <a href="https://w3techs.com/about" class=no_und rel=nofollow>About Us</a> <a href="https://w3techs.com/disclaimer" class=no_und rel=nofollow>Disclaimer</a> <a href="https://w3techs.com/terms_of_use" class=no_und rel=nofollow>Terms of Use</a> <a href="https://w3techs.com/privacy_policy" class=no_und rel=nofollow>Privacy Policy</a> <a href="https://b.w3techs.com/" class=no_und>Advertising</a> <a href="https://w3techs.com/feedback" class=no_und rel=nofollow>Contact</a> </div> <div id=social_ft> W3Techs on   <a href="https://www.linkedin.com/company/w3techs"><img loading=lazy src="https://w3techs.com/pictures/LinkedIn.svg" alt="LinkedIn"> LinkedIn</a> <a rel="me" href="https://techhub.social/@w3techs"><img loading=lazy src="https://w3techs.com/pictures/Mastodon.svg" alt="Mastodon"> Mastodon</a> <a href="https://bsky.app/profile/w3techs.com"><img loading=lazy src="https://w3techs.com/pictures/Bluesky.png" alt="Bluesky"> Bluesky</a> </div> <div id=cp>Copyright © 2009-2025 Q-Success<br><br> </div></div>