Free Online Tool
XML Formatter & Validator
Format and pretty-print XML instantly. Paste minified or messy XML and get clean, indented, readable output. Free online XML formatter and validator.
Try sample:
Input
Output
Output will appear here
Press ⌘ Enter to convert
How It Works
- 1Paste minified or messy XML
- 2DevConvert parses and re-serialises with 2-space indentation
- 3Copy the formatted output or download as a .xml file
Examples
Minified XML
Input
<root><user><id>1</id><name>Alice</name></user></root>
Output
<root>
<user>
<id>1</id>
<name>Alice</name>
</user>
</root>Frequently Asked Questions
Does this also validate XML?
Yes. DevConvert checks that the XML is well-formed (properly nested tags, closed elements, valid attributes) and shows an error if not.
Does it validate against an XSD schema?
No — schema validation requires an XSD file. DevConvert validates well-formedness only.
Can I format large XML files?
Yes, up to a few MB. Very large files may slow the preview rendering but the conversion itself completes quickly.