Format nested JSON
Input: {"user":{"name":"Ada"},"ok":true}
Output: {
"user": {
"name": "Ada"
},
"ok": true
}
Developer
JSON Formatter/Validator
Format, minify, and validate JSON with clear parser errors.
Runs locallyNo uploadNo external API
Input
Output
Paste JSON or load a sample to format and validate it.
Paste JSON or load a sample to format and validate it.
Runs in your browser. Input is not uploaded or sent to an external API.
Related tools
How to use JSON
Make JSON readable, compact it for transport, or confirm that a pasted payload parses before sharing it with a teammate.
- Paste or type your input.
- Load the sample if you want a quick check.
- Run the action, review the result, then copy only what you need.
Examples
Minify JSON
Input: { "ok": true, "count": 2 }
Output: {"ok":true,"count":2}
Common use cases
Debug API responses
Format a response, then use JSON Diff to compare it with an expected payload.
Prepare data conversion
Validate JSON before converting arrays into CSV.
Limitations
Strict JSON only
Comments, trailing commas, and unquoted keys are rejected by the browser JSON parser.
FAQ
Why does valid JavaScript object text fail here?
JSON is stricter than JavaScript object literals. Keys must be quoted and comments are not allowed.
Can I format sensitive JSON locally?
The formatter runs in your browser and does not send the input to a server.