JSON Formatter & Beautifier
Pretty-print, validate, minify and repair JSON — right in your browser.
Format JSON in one click
Paste raw or minified JSON and hit Format to get clean, consistently indented output. Choose 2-space, 4-space or tab indentation, sort object keys alphabetically, or Minify to strip every unnecessary byte before shipping a payload.
If your input is broken — trailing commas, single quotes, unquoted keys, comments — Repair fixes the common mistakes automatically. Everything runs in your browser — your JSON never leaves your device, so it is safe for API keys, customer records, and production payloads.
Why a dedicated JSON beautifier?
Minified API responses and log lines are unreadable. A formatter restores structure so you can diff configs, review payloads in code reviews, and spot a wrong field in seconds. MUNEX.IN also shows live stats — size, key count, nesting depth — and pin-points syntax errors with the exact line and column.
Frequently asked questions
- Is this JSON formatter free?
- Yes — completely free, with no sign-up, no rate limits and no file-size paywall.
- Is my JSON uploaded to a server?
- No. Formatting, validation and conversion all run locally in your browser via JavaScript. Your data never leaves your device.
- Can it fix invalid JSON?
- Yes. The Repair action fixes trailing commas, single quotes, unquoted keys, comments and other common mistakes, then formats the result.
- What indentation options are supported?
- 2 spaces, 4 spaces, or tabs — plus full minification and alphabetical key sorting.