Developer

Ready Tool

JSON Formatter

Format, validate, and minify JSON.

Runs in your browser. Inputs are not stored by this site.

Runs locally in your browser. Paste JSON to format, minify, and validate it.

Paste JSON to begin.

Quick guide

How to use JSON Formatter

JSON Formatter makes compact JSON easier to read, validates its syntax, and can remove unnecessary whitespace again. Errors include a useful location when the parser can identify one.

Steps

  1. Paste or type JSON into the input editor.
  2. Format it for readability or minify it for compact output.
  3. Review any validation error, then copy the finished JSON.

Good to know

  • Formatting changes whitespace and indentation, not the underlying JSON values.
  • JSON does not support comments, trailing commas, or unquoted property names.
  • Input is processed locally and is not sent to heron.tools.

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