This tool is an ongoing experiment in better HTML checking, and its behavior remains subject to change
Error: Start tag seen without seeing a doctype first. Expected <!DOCTYPE html>.
From line 1, column 1; to line 1, column 82
<a href='/htval/?showsource=yes&doc=https://ipv4.kwynn.com/t/23/02/htva/htva.php'>↩ <img
Error: Element head is missing a required instance of child element title.
From line 1, column 1; to line 1, column 82
<a href='/htval/?showsource=yes&doc=https://ipv4.kwynn.com/t/23/02/htva/htva.php'>↩ <img
head:iframe srcdoc document or if title information is available from a higher-level protocol: Zero or more elements of metadata content, of which no more than one is a title element and no more than one is a base element.title element and no more than one is a base element.Warning: Consider adding a lang attribute to the html start tag to declare the language of this document.
From line 1, column 1; to line 1, column 82
<a href='/htval/?showsource=yes&doc=https://ipv4.kwynn.com/t/23/02/htva/htva.php'>↩ <img
There were errors.
<a href='/htval/?showsource=yes&doc=https://ipv4.kwynn.com/t/23/02/htva/htva.php'>↩ <img src='/t/5/02/html5_valid.jpg' alt='HTML5 validation check' width='103' height='36' />↩</a>Used the schema for HTML + SVG 1.1 + MathML 3.0 + RDFa 1.1.
Used the HTML parser. Externally specified character encoding was UTF-8.
Total execution time 157 milliseconds.
About this checker • Report an issue • Version: 25.11.1