XML Formatter & Validator
Pretty-print and syntax-check XML instantly.
Runs 100% in your browser — nothing is ever uploaded.
What is XML?
Format messy XML with proper indentation and validate its syntax. Free XML beautifier that runs 100% in your browser. Paste your content, get an instant result, and copy or download the output with a single click. Free and unlimited, with no watermarks and no registration — all processing happens right in your browser, so nothing is ever sent to a server.
How to use XML
- Open XML — it loads instantly and needs no sign-up.
- Paste or type your input into the editor (or press Sample to try an example).
- Adjust the available options if needed and press the action button.
- Copy the result with one click or download it as a file.
Frequently asked questions
Is XML really free?
Yes — XML is 100% free with no limits, no watermarks and no registration. You can use it as often as you like, on as many files or inputs as you need.
Is my data safe when I use XML?
Absolutely. XML runs entirely in your browser using JavaScript — your input is processed on your own device and is never uploaded to any server.
Does XML work on mobile devices?
Yes. XML works in any modern browser on desktop, tablet and mobile (Chrome, Firefox, Safari, Edge) — there is no app to install.
Is my data uploaded anywhere?
No. Every DataForge tool runs entirely in your browser. Text and files are processed locally and never sent over the network.
Are the conversions accurate?
Yes — we use the same battle-tested libraries developers use in production (native Web Crypto for hashes, js-yaml for YAML), so output matches what your toolchain produces.
Is there a size limit?
No hard limit. Processing happens on your machine, so even large documents convert in milliseconds.