About JSON Formatter
A fast, private set of JSON tools — built by a developer who was tired of slow, cluttered ones.
What this site is
json-formatter.org is a collection of free tools for working with JSON: a formatter and validator, a tree viewer, a minifier, and more. No accounts, no upload forms, no artificial limits — paste, click, done.
The privacy principle
Every tool runs entirely in your browser. The JSON you paste is parsed, formatted and validated by JavaScript on your machine; it is never transmitted to, processed by, or stored on our servers. That's not a policy promise that requires trust — it is how the software is built, and you can verify it in your browser's network tab. Even shared links encode the document into the link itself rather than storing it anywhere.
How it's funded
The site is free to use and funded by advertising. Ads are kept out of the tools' way — they never overlap the editors, never move the layout, and never affect performance. See the privacy policy for the details on advertising cookies and your choices.
Who builds it
Built and maintained by an independent software developer in Austria, on a stack of Angular, CodeMirror and a deterministic JSON parsing engine that reports the same exact error positions on every browser. Found a bug, or missing a tool you need? Get in touch — the roadmap is genuinely driven by requests.