The validator checks against HTML5 standards. It catches common issues like unclosed tags, invalid nesting, missing required attributes, and deprecated elements. For simpler content authoring, consider writing in Markdown and converting to HTML.
What's the difference between HTML and XML validation?
HTML is more forgiving than XML. Self-closing tags like <br> are valid in HTML but require <br/> in XML. Check our XML Validator for stricter validation.
Does this check for accessibility issues?
The validator focuses on HTML syntax and structure. For accessibility (WCAG) validation, use specialized tools like axe or WAVE alongside this validator.
Is my data secure?
Yes, all validation happens locally in your browser. Your HTML code never leaves your device.
