HTML Formatter and Validator
Turn compressed HTML into a readable structure and catch common tag nesting problems before reviewing or publishing markup. The formatter preserves raw-text content such as scripts and styles while it works.
How to use this tool
- Paste HTML into the input editor.
- Choose formatting or minification and review the structural validation messages.
- Inspect the output and copy or download the cleaned markup.
Tips
- Formatting is not a substitute for a full accessibility or standards audit; check semantics, labels, and document structure separately.
- Review embedded script, style, and preformatted content after formatting because those regions can be intentionally whitespace-sensitive.
Frequently asked questions
Can the HTML formatter find mismatched tags?
Yes. It performs structural checks and reports common unclosed or mismatched element tags.
Does it sanitize HTML?
No. It formats and checks markup; it does not make untrusted HTML safe to render.