About XML Formatter & Validator
A fast, clean developer tool for formatting, validating, and converting XML — built to be the alternative to ad-heavy incumbents.
What this tool does
XML Formatter & Validator gives you a full suite of XML tools in one place — no signup, no upload limits, no paywalls:
- Format / Beautify — adds proper indentation and line breaks so nested structures are readable at a glance.
- Validate — checks well-formedness in real time as you type, with plain-English error messages pointing to the exact line.
- Minify — strips all unnecessary whitespace to produce the most compact version for network transmission.
- Convert to JSON — turns XML into clean JSON, preserving attributes as
@_keypairs and repeated elements as arrays. - Convert to YAML — chains XML → JSON → YAML for teams that prefer YAML configuration.
- Tree View — an interactive hierarchy panel so you can navigate large documents without scrolling through raw text.
Your data never leaves your browser
Every operation — formatting, validation, conversion — runs entirely in JavaScript on your machine. No data is sent to any server. You can disconnect from the internet after the page loads and the tool still works. This matters for config files, internal API payloads, and any XML containing sensitive information.
Why we built it
The existing XML tools online — freeformatter.com, codebeautify.org, and similar — are useful, but they're cluttered. Multiple interstitial ads, slow page loads, and interfaces designed around driving clicks rather than helping you work.
We wanted something that loads fast, gets out of your way, and works on any device without sending your data anywhere. The result is this tool: a clean editor with syntax highlighting, real-time validation, and all the conversion options you actually need.
Related tools
XML Formatter is part of a family of developer format tools built on the same principles: fast, private, and free.