Validators
HTML Validator
Validate your HTML code against modern web standards to identify syntax errors, unclosed tags, and accessibility issues. Get immediate feedback with line numbers to ensure your website renders correctly across all browsers.
Validate your HTML code against modern web standards to identify syntax errors, unclosed tags, and accessibility issues. Get immediate feedback with line numbers to ensure your website renders correctly across all browsers.
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Tip
Use semantic elements like <main> and <nav> to help search engines understand your page layout.
Did You Know?
Valid HTML reduces the risk of 'quirks mode' rendering where browsers guess how to display broken code.
<div> or <span>, which often breaks layoutsalt tag on images or lang on the root HTML elementid attribute on multiple elements, causing issues with JS and CSS<ul> and accidentally closing it with </ol>Best Practice
Always include a <title> and <meta charset='UTF-8'> tag in your document head for better SEO and compatibility.
Q: Does this tool check for HTML5 standards? A: Yes, the validator checks against modern HTML5 specifications while identifying common legacy issues.
Q: How do I find the specific line causing a problem? A: Every error message includes a line and column reference, and the editor highlights the offending code.
Q: Does valid HTML help with search rankings? A: Yes, valid code makes it easier for search engines to crawl and understand your site's structure.
Q: Can I validate a full document or just a snippet? A: You can validate both full HTML documents including the doctype or small code snippets.