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Text & data / FREE ONLINE TOOL

JSON formatter & validator.

Paste JSON to detect syntax errors, format readable output, or remove unnecessary whitespace.

Free to useNo signup requiredProcessed in your browser
Output

Paste some JSON to get started.

Input is parsed only in your browser.

Formatting changes whitespace, not the JSON data model. This tool does not support JSON comments or trailing commas.

How to use this tool

  1. Paste a JSON string, object, or array into the input area.
  2. Choose readable formatting or minification; validation updates as you edit.
  3. Fix any displayed syntax error, then copy your validated result.

Good to know

Only valid JSON is accepted: property names require double quotes, trailing commas and comments are not allowed. JavaScript objects are not always valid JSON.

This utility processes your input locally in your browser. RezSat Tools does not upload your input to its servers. As with any online tool, avoid entering sensitive information on devices you do not trust.

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