DEV 🎨 Format

JSON Formatter & Validator

JSON (JavaScript Object Notation) is the universal format for data exchange on the web. This tool validates your JSON syntax, formats it for readability, and lets you choose your preferred indentation style.

How to Use

  1. Paste your JSON string into the input panel.
  2. Select your preferred indent style (2 spaces, 4 spaces, or tabs).
  3. Click Transform to format and validate the JSON.
  4. Click Copy to copy the formatted output.

How It Works

The tool parses your JSON using the browser's built-in JSON.parse(). If parsing succeeds, your JSON is valid. The formatter then uses JSON.stringify() with your chosen indent level to produce readable output.
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