JSON Formatter & Beautifier
Paste your JSON, format it with proper indentation, validate errors and minify — instantly, no server required.
// Formatted JSON will appear here
What is a JSON Formatter?
A JSON formatter takes compact or poorly formatted JSON and reformats it with proper indentation, line breaks and spacing — making it human-readable and easy to inspect. Whether you're debugging an API response, reviewing a config file or preparing test data, a formatter saves time and eliminates manual reading errors.
What Can This Tool Do?
Format & Beautify
Instantly add proper indentation and line breaks — choose 2 spaces, 4 spaces or tabs.
Validate JSON
Detect syntax errors — missing quotes, trailing commas, mismatched brackets — with exact error location.
Minify JSON
Remove all whitespace and compress JSON to a single line — ideal for API payloads and production configs.
Instant — No Server
Everything runs in your browser — no data sent to any server. Fast, private and works offline.
Common Use Cases
- Formatting API responses for debugging
- Beautifying config files and app settings
- Validating test data before sending to APIs
- Minifying JSON payloads for production
- Reviewing Postman responses
- Inspecting database JSON fields
Frequently Asked Questions
Is this JSON formatter free?
Yes. This JSON formatter, validator and beautifier is completely free to use with no registration required.
Does my JSON leave my browser?
No. All formatting, validation and minification happen locally in your browser. No data is sent to any server.
Can I validate JSON online?
Yes. The validator instantly checks your JSON and highlights syntax errors when detected.
Can I minify JSON?
Yes. Use the Minify button to compress JSON into a single-line payload suitable for APIs and production environments.
What indentation options are available?
You can format JSON using 2 spaces, 4 spaces or tab indentation.