JSON Formatter

Validate, pretty-print, and minify JSON with exact error messages and key counts, all entirely within your browser.

JSON Input

Paste your JSON here

How It Works

Your JSON is parsed with the browser's native JSON parser. Any syntax error is reported with its exact message, so you can pinpoint the problem quickly.

Format pretty-prints with two-space indentation, Minify strips all whitespace, and Validate reports the number of top-level keys or array items.

All processing happens locally. Your data is never sent to a server.

Frequently Asked Questions (FAQ)

Yes! Every string, payload, regex, or file is processed strictly inside your local browser tab using HTML5 and Web Crypto APIs.

Yes. Once loaded, all computations run entirely client-side without relying on external API requests.

Because processing happens on your machine, limits depend only on your system's available memory.

Disclaimer Notice

Technical Disclaimer: This JSON Formatter processes source code and data strictly client-side. Always back up critical code before performing minification, formatting, or encoding operations.

JSON Formatter

JSON Input

Output

Disclaimer Notice