XML Formatter & Validator

Format, indent, and validate XML documents with DOMParser syntax checking.

About this tool

Clean up unformatted XML documents and identify syntax errors with client-side validation.

How to use this tool

  1. Paste XML text
  2. Click Run
  3. Copy indented XML output

How it works

Parses input through native browser DOMParser to detect unclosed tags and formats indentation.

When to use this tool

  • Formatting SOAP API responses
  • Validating XML sitemaps and RSS feeds

Frequently asked questions

Does it detect unclosed tags?

Yes, DOMParser reports exact tag mismatch errors.

Limitations

Extremely large XML files (>25MB) may cause browser memory limits.

Privacy

Private documents remain strictly in your browser.