Result
Result will appear here
What does it do?
Turns messy JSON into a readable, indented structure — or compresses it to one line. Also validates syntax.
Why use it?
Debugging APIs, reading config files, checking data format — JSON is often a wall of text. After formatting, it becomes clear.
Is it free?
Completely free. No paywall, no usage limit, no sign-up. Everything runs locally, JSON never uploads.
Three operations
- Format: indent with 2 spaces for readability.
- Minify: remove all spaces and newlines, output the most compact one-line JSON.
- Validate: check syntax. Errors show location and reason.
FAQ
What operations are supported?
Format (beautify), minify, and validate JSON.
Is the JSON uploaded?
No. Everything happens in your browser. JSON never leaves your device.
Why do I see a syntax error?
Common causes: missing comma, extra comma, mismatched quotes, mismatched brackets, single quotes (JSON only allows double quotes).
What size JSON is supported?
No hard limit, but keep it under 5MB for best performance.
Is it free?
Completely free. No paywall, no usage limit.