XML formatter
Free · no sign-upBeautify or minify XML and see parse errors clearly — right in your browser.
Runs entirely in your browser — your data never leaves your device and nothing is stored. No sign-up.
Format messy XML or compress it to a single line — validate with the browser's DOMParser and see human-readable parse errors when something is wrong. Choose 2-space, 4-space or tab indentation for beautify. No upload: parsing and serialisation stay on your device. Free, no sign-up.
- ✓Beautify with 2 / 4 spaces or tabs
- ✓Minify by stripping inter-tag whitespace
- ✓DOMParser validation with clear errors
- ✓No dependencies — pure browser XML
- ✓One-click copy of the result
- ✓Runs locally — nothing uploaded
Who it's for
- Cleaning API or config XML
- Debugging malformed payloads
- Preparing readable samples for docs
- Shrinking XML before embedding
How it works
- 1Paste your XML into the input.
- 2Pick an indent size if you plan to beautify.
- 3Click Beautify or Minify.
- 4Copy the result or fix any reported parse error.
Frequently asked questions
Does this validate against an XSD?+
No — it checks well-formedness via DOMParser (application/xml). Schema validation is out of scope.
What does minify do?+
It removes insignificant whitespace between tags while keeping element structure and text content.
Why did I get a parser error?+
The markup is not well-formed — common causes are unclosed tags, mismatched names, or illegal characters in text. The message points at what the browser rejected.
Are namespaces preserved?+
Yes — attributes and tag names are serialised as the parser saw them, including prefixed names.
Is my XML uploaded?+
No. Everything runs in your browser.
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