HTML/XML Formatter Online
The best free HTML formatter and beautifier. Perfectly indent XML and HTML markup instantly for better readability and debugging.
Minified / Messy Code
Beautified Output
Built With Care
“Formatted and minified HTML render identically in browsers. Indentation is for developer readability, not browser performance.”
HTML/XML Formatter
Paste minified or messy HTML/XML and get back properly indented, readable code. Works with nested tags, self-closing elements, and mixed content.
No signup neededRuns offlineClient-side processing
How to Use HTML/XML Formatter
- 1Copy your unformatted, minified, or messy HTML/XML from your source file.
- 2Paste the code into the left-hand editor panel labeled 'Messy Source'.
- 3Click the 'Beautify Markup Now' button to run the structural analysis.
- 4Review the cleaned, indented output in the right-hand panel.
- 5Copy the formatted result back into your development environment.
Key Features
- Smart Nesting Detection: Automatically calculates indentation levels for parent and child tags.
- Standard Indentation: Applies a consistent 4-space tab rule for professional readability.
- Multi-Format Support: Works perfectly for both modern HTML5 and strictly structured XML documents.
- Instant Preview: Real-time beautification with a scrollable code terminal for large documents.
- Instant Formatting: HTML and XML are prettified as you paste.
Real Ways People Use This
Code Reviews
Run generated or minified HTML through the formatter before pushing so teammates can actually read the diff.
Email Templates
Beautify HTML email source so you can edit content and structure without losing your place.
XML Configs
Indent sitemaps, RSS feeds, Android manifests, and other XML files that ship minified by default.
Important Notes
- Formatting improves readability but does not guarantee semantic correctness of markup.
- Malformed tags can still produce misleading output shape; validate syntax separately when needed.
- Large minified files may cause brief UI lag during parsing in browser.
Quick Checklist
- 1Paste raw markup and run formatter once.
- 2Review indentation and tag structure around complex nested sections.
- 3Validate rendered output or run linter/validator before committing.