JSON Formatter & Validator

Why format JSON?

Raw JSON from APIs, log files or configuration tools is often minified — everything crammed onto one line with no whitespace. That makes it nearly impossible to read or debug. Beautifying adds consistent indentation so the structure is immediately clear: nested objects are indented, arrays are easy to scan, and mistakes like missing commas or mismatched braces become obvious at a glance.

When to minify

Minification removes all unnecessary whitespace, reducing file size. Use it before embedding JSON in a production API response, configuration file or HTML attribute where every byte counts. The Validate button checks your JSON is syntactically correct without transforming it — useful before committing a config file or testing an API payload.

Private by design

All formatting and validation happens inside your browser. Your JSON is never sent to a server, which makes this safe for internal API payloads, database exports and config files that may contain sensitive keys.