JSON Formatter / Validator

Paste raw or minified JSON and get it beautified with consistent indentation, or collapse it down to a single line. The validator flags syntax errors — trailing commas, unquoted keys, mismatched brackets — and points you to the exact line so you can fix malformed API responses, config files, and log payloads fast.

Everything runs in your browser, so nothing you paste is ever uploaded. Common uses: cleaning up an API response before reading it, checking that a config file is valid JSON, and reformatting minified data for a code review.