XML Formatter Online — Validate and Beautify XML
Format XML online into readable indentation while retaining elements and attributes locally in your browser.
About this tool
This XML formatter parses the document with attributes enabled and rebuilds formatted XML. It improves readability but may normalize declaration, whitespace and representation details.
How to use
- Paste the XML document.
- Format it to parse and rebuild the structure.
- Review elements and attributes before copying.
Features
- Formats nested XML elements.
- Retains parsed attributes.
- Runs locally without upload.
Common use cases
- Read API XML responses.
- Clean configuration XML.
- Inspect nested document structure.
Common issues and tips
- Malformed tags prevent parsing.
- Mixed content and formatting may change during rebuilding.
Privacy
XML formatting runs locally. Input is not uploaded to Tools12345.
Frequently asked questions
Does it validate XML?
It must parse the input before formatting, so malformed XML fails.
Are attributes kept?
Yes, parsed attributes are included.
Will output be byte-identical?
No. Formatting and some representation details can change.