XML Validator — Well-Formedness & Error Lines
Validate, format, and minify XML data
How to Use XML Validator & Formatter
Validate, format, and minify XML data No signup, and nothing gets uploaded for most use.
- 1
Paste your code, JSON, or data into the editor.
- 2
Pick the transformation or validation options.
- 3
Run it and inspect the results in real time.
- 4
Copy the output or download it as a file.
Why you might like it
- Nothing to upload — the work happens on your device.
- Free with no signup, no watermarks, and no daily limits.
- Works in any modern browser on any device — nothing to install.
- Usually done in a few seconds, so it doesn't get in your way.
Frequently Asked Questions
How do I validate XML files against syntax errors?▾
Paste XML content. The validator checks schema rules, detects unmatched tags, and flags exact error line positions.
Can I format and minify validated XML?▾
Yes. You can format or compress XML immediately after validating.
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