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HTML Validator

Check HTML for structural errors such as unclosed or mismatched tags.

How it works Report a problem

HTML Validator

Check for unclosed tags, syntax errors, and structural issues in your HTML

READY
HTML Code
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About the HTML Validator

Check HTML for structural errors such as unclosed or mismatched tags.

How to use the HTML Validator

  1. Paste your HTML, or click Valid Sample or Error Sample to see how it reports problems.
  2. Press Validate HTML Structure.
  3. Read the status and fix the issues listed.

Tips

  • Fix the first error first. Later errors are often caused by it.
  • For full standards validation, also test with the W3C validator.

Frequently asked questions

Why validate HTML?
Valid HTML displays more consistently in different browsers and is easier for search engines to read.