What is HTML Validator?
An HTML validator checks your markup for structural consistency and common authoring errors.
How to Fix Invalid Input?
Typical issues include missing closing tags, mismatched nesting, and duplicate IDs. Line-linked issue cards help fast repair.
Features
- Error and warning hints for invalid structure.
- Line jump support for fast debugging.
- Format and validate in one tool.
- Upload, download, copy, and clear controls.
- Works in-browser with no sign-up.
Why Use Our Tool?
Keep your markup reliable and readable with instant, privacy-safe validation.
FAQs
Can I see HTML errors by line?
Yes, issues include line references when detectable.
Will this store my HTML?
No. Validation runs in your browser.
Can beginners use this?
Yes, hints are written in simple language.
Also try: HTML Formatter | SQL Formatter | CSS Beautifier