Free JSON Formatter

Format, minify, or validate — what's the difference?

Format pretty-prints your JSON with consistent indentation so it's easy to read and diff. Minify strips every optional space and line break to make the smallest possible payload for APIs and storage. Validate checks that the JSON parses and, if not, tells you exactly where it breaks — including the line and column of the first error.

Turn on Sort keys alphabetically to reorder object keys recursively, which makes two JSON documents much easier to compare.

Your JSON never leaves your browser

This tool uses your browser's built-in JSON engine. Nothing is uploaded, stored, logged, or tracked. There is no account, no watermark, and no external service in the middle — you can even use it offline.