JSON Formatter & Validator

Format, validate, beautify, and minify JSON data instantly. All processing happens client-side -- your data never leaves your browser.

How to Use the JSON Formatter

  1. Paste your JSON into the input area on the left, or click "Load Sample" to try an example.
  2. Click Format to pretty-print with indentation, or Minify to compress into a single line.
  3. Check the validation status below the buttons. Valid JSON shows a green indicator; invalid JSON shows the exact error message.
  4. Click Copy to copy the output to your clipboard.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It is used extensively in web APIs, configuration files, and data storage.

Features

  • Pretty-print JSON with configurable indentation (2 or 4 spaces)
  • Minify JSON to a compact single-line format
  • Real-time validation with detailed error messages
  • One-click copy to clipboard
  • 100% client-side processing for full privacy
  • No data stored, no sign-up required