Free Online JSON Formatter & Validator

Paste raw JSON on the left, then Format to get clean, readable JSON on the right. You can also Minify, copy, or download.

JSON Formatter Tool

Tip: Press Run to format or minify in your browser. No data leaves your device.

About This JSON Formatter

This free JSON formatter is built for speed and privacy. It validates your JSON, then pretty‑prints with customizable indentation or minifies for production. Use it for APIs, config files, logs, or anywhere structured data needs to be human‑readable.

Key features

  • Client‑side validation & formatting (data stays in your browser)
  • Pretty print with 2–8 space indentation
  • Minify to reduce file size for deployments
  • Copy to clipboard & one‑click download
  • Sample JSON to get started fast

How to use

  1. Paste your raw JSON in the left editor.
  2. Choose Pretty Print or Minify and set the indent.
  3. Click Run to validate and transform.
  4. Copy or download the result for use in your project.

New to JSON? Read the FAQs below for quick fixes on common errors like missing quotes or trailing commas.