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JSON Formatter & Validator

Paste raw, minified, or broken JSON and instantly get it formatted, readable, and validated. Everything runs in your browser — nothing is sent to any server.

Indent:

Input JSON

Formatted Output

Formatted output appears here...

Processed entirely in your browser — nothing is sent to any server

What is a JSON Formatter?

A JSON Formatter takes raw or minified JSON and adds proper indentation and line breaks to make it human-readable. It also validates your JSON and highlights errors so you can fix them instantly. Developers use it daily when working with APIs, config files, and data structures.

How to use this tool

Paste your JSON into the left panel
The formatted output appears instantly on the right
If there is an error, it will be highlighted in red with the exact problem
Click Copy to copy the result, or Download to save it as a .json file

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