JSON Formatter & Validator

Pretty‑print, validate, and minify JSON directly in your browser with instant error messages and clean output.

Clean and validate your JSON

Developer Tool

Paste raw JSON, fix errors based on helpful messages, and export readable or minified versions.

Input JSON

Lines: 0 · Characters: 0 Waiting for input

Output JSON

Lines: 0 · Characters: 0 No output yet

Indent:

Tip: This formatter runs fully in your browser. JSON data is not sent to any server.[file:163]

Help

Use the formatter to debug API payloads, tidy config files, or quickly check JSON validity.

Parsing errors point you to the line and column where JSON became invalid so you can fix it quickly.[file:163]

Use the formatter while developing or debugging APIs to inspect payloads and ensure they match the expected schema.[file:163]

All JSON is processed locally in your browser tab and is not stored or transmitted by this tool.[file:163]

Clean up and verify JSON payloads in a few quick steps.

Drop your JSON into the input editor or use the Sample button to start with example data.[file:163]

Use “Format & validate” to pretty‑print with your chosen indent size and check for syntax errors.

If parsing fails, read the error message and update the input JSON until it shows as valid.[file:163]

Copy the formatted or minified JSON to your clipboard or download it as a .json file for reuse.[web:148][web:154][web:160]