MrTools
Free toolRuns on your device

JSON Formatter

Format and validate JSON with readable two- or four-space indentation.

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JSON workspace

Enter JSON to format.

01 · Guide

How to use it

Paste JSON and choose an indentation size. The formatter uses the browser JSON parser, never evaluates code, and reports invalid syntax without exposing the input.

  1. Paste or type valid JSON.
  2. Choose two or four spaces.
  3. Format the JSON and review the result.

02 · Answers

Frequently asked questions

Does the formatter execute JavaScript?+

No. It only parses JSON with JSON.parse and never evaluates the input as code.

Does my input leave this device?+

No. The operation runs locally in this browser and MrTools does not receive the entered data.

03 · Next

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