Developer tool
Format and Validate XML
Check XML well-formedness and indent element markup for easier reading.
Runs locally in your browser
Your text is not uploaded.
Simple steps
How it works
- 01
Paste XML into the editor.
- 02
Choose indentation and format the document.
- 03
Copy valid formatted XML or review the parser error.
Good to know
Frequently asked questions
Does formatting validate XML?
Yes. A browser XML parser checks that the document is well-formed before formatting.
Does it validate against an XSD or DTD?
No. It checks syntax only; schema validation is not included.
Can I choose indentation?
Yes. Select two spaces, four spaces, or tabs.
Will formatting preserve every whitespace node?
Formatting normalizes indentation between markup; review mixed-content XML carefully.
Is XML uploaded?
No. Parsing and formatting happen in your browser.