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Free JSON Formatter & Beautifier Online 2026

Format, beautify, and validate JSON online. Fix minified JSON, validate syntax, and make your JSON readable.

JSON Input

Formatted Output

How to Format JSON Online

  1. Paste your minified or messy JSON into the input box
  2. Select your preferred indent size (2, 4, or 8 spaces)
  3. Click "Format JSON" to beautify or "Minify" to compress
  4. Copy the result or download as a file

Why Use a JSON Formatter in 2026?

  • Improve Readability: Transform minified JSON into human-readable format
  • Validate Syntax: Instantly detect JSON syntax errors
  • Debug APIs: Format API responses for easier debugging
  • Code Reviews: Make JSON configuration files easier to review
  • Privacy First: All formatting happens in your browser, no data sent to servers
  • No Installation: Works instantly in any modern browser

Format vs Minify: When to Use Each

Format (Beautify)

Use when you need to:

  • Read and understand JSON structure
  • Debug configuration files
  • Review code changes
  • Learn JSON syntax

Minify

Use when you need to:

  • Reduce file size for production
  • Optimize API responses
  • Save bandwidth
  • Improve load times

Common JSON Formatting Issues Fixed

Missing Commas

Our validator will detect missing commas between properties

Trailing Commas

Identifies invalid trailing commas that break JSON spec

Quote Issues

Detects single quotes or missing quotes around property names

Unclosed Brackets

Finds mismatched brackets and braces

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