JSON Prettify

Format, validate, and beautify your JSON data instantly — no signup required.

⚡

Instant Formatting

Format JSON in real-time. No server needed — everything runs in your browser.

🔍

Error Detection

Find and fix JSON syntax errors with clear, helpful error messages.

🔒

100% Private

Your data never leaves your browser. No data is sent to any server.

What is JSON Prettify?

JSON Prettify is a free online tool that formats, validates, and beautifies your JSON data. Whether you're a developer debugging API responses, a data analyst working with JSON files, or anyone who needs to read JSON more easily — this tool makes it simple.

How to Use

  1. Paste your JSON into the input field
  2. Click Prettify to format it with proper indentation
  3. Use Minify to compress JSON into a single line
  4. Click Validate to check for syntax errors
  5. Copy or download the result

Features

  • Format JSON with 2 spaces, 4 spaces, or tabs
  • Minify JSON to reduce file size
  • Validate JSON syntax with helpful error messages
  • Copy formatted output to clipboard
  • Download formatted JSON as a file
  • 100% client-side — your data stays private
  • Works on mobile, tablet, and desktop
  • No registration or signup required