XML Formatter & Validator
Format, beautify and validate XML documents with clear error reporting.
Three steps, no reading required.
Paste your input
Drop text, code, or data into the input pane — from an API response, a file, anywhere.
Pick a mode
Toggle the modes above the output. The result updates instantly as you type.
Copy the result
Grab the output with Copy or Download, or fix the error shown if the input is invalid.
Try it with a sample.
<note><to>Dev</to><from>DevUtilsNow</from><body>Format me!</body></note>
Upload & hope
- Sends your input to a server to process it
- Asks for an account after a few free uses
- Limits input size on the free tier
Runs where you are
- Processes everything inside your browser tab
- No account, ever
- No artificial size limit
Questions worth answering upfront.
No. XML formatting and validation run entirely in your browser. Your document never leaves your device.
Yes. When XML is malformed the tool shows the parse error and, where the browser provides it, the location of the problem.
Yes. You can collapse an XML document to remove insignificant whitespace as well as beautify it with indentation.
Yes. Every tool on DevUtilsNow is free, with no account and no usage limits.
People who use this also reach for
Guides that pair with this tool
How to Format and Validate XML
What makes XML well-formed, the rules parsers enforce, and how to format messy XML and catch errors.
Need another tool?
36+ browser-based utilities — all free, all private, nothing to install.