JSON Formatter & Validator
Format, minify, and validate JSON entirely in your browser. Errors include a line and column so you can find the problem without losing your input.
Runs in your browser
No account. No upload.
Workspace
LOCAL
Input
0 characters · 0 lines
Output
Formatted JSON appears here
Format, minify, or validate the input. Your JSON is never uploaded.
How to use
- 1Paste or type JSON into the input panel.
- 2Choose Format to indent it, Minify to compress it, or Validate to check the syntax.
- 3Copy the result, or load the example to see the expected shape.
Examples
API responses
Pretty-print a payload before reading nested objects and arrays.
Configuration files
Catch a trailing comma or missing quote before deploying a config.
Compact payloads
Minify JSON before placing it in a request body or environment value.
Privacy
JSON is parsed and formatted in a Web Worker in your browser. Nothing is uploaded, logged, or stored.
Do not paste secrets or production credentials into any browser tool.
Related tools
All toolsBase64 Encoder & Decoder
Encode UTF-8 text to Base64 and decode it back safely.
Open toolJWT Decoder
Inspect a JWT header and payload without verifying its signature.
Open toolRegex Tester
Test a regular expression, inspect matches, and read capture groups.
Open tool