TToolza

JSON Formatter & Validator

Format, validate and minify JSON with clear error messages.

Processed on your device. Your files never leave your browser.

About JSON Formatter & Validator

JSON (JavaScript Object Notation) is a lightweight data format. This tool beautifies messy JSON, validates it with precise error messages, and minifies it to save space — all in your browser.

How to use

  1. 1Paste or type your JSON into the input.
  2. 2Click Format to beautify or Minify to compact it.
  3. 3If there's a syntax error, the message points to where it is.
  4. 4Copy or download the result.

Features

  • Beautify with configurable indentation.
  • Minify to a single compact line.
  • Clear, specific validation errors.
  • Copy to clipboard or download as a .json file.

Frequently asked questions

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