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JSON Formatter

JSON Formatter

Format and validate JSON online. Paste your JSON, click format, then copy or download the prettified output.

Formats JSON with indentation Validates JSON and shows clear errors Copy and download formatted JSON Import JSON from URL or file Theme switcher Fullscreen editor mode

Input JSON

Paste your JSON here

Formatted Output

Copy or download the formatted JSON

Key Features

  • Formats JSON with indentation
  • Validates JSON and shows clear errors
  • Copy and download formatted JSON
  • Import JSON from URL or file
  • Theme switcher
  • Fullscreen editor mode

How to Use

  1. Paste your JSON into the input editor.
  2. Choose indent, optional sort keys, and theme.
  3. Click Format to prettify or minify.
  4. Click Validate to check for errors.
  5. Copy or download the formatted output.

Free Online JSON Formatter and Beautifier

Transform messy JSON into clean, readable code with our powerful online JSON formatter. Paste minified or malformed JSON, and our tool instantly beautifies it with proper indentation, color syntax highlighting, and error detection. Perfect for API developers, data engineers, and anyone working with JSON data. No installation required—format JSON in seconds directly in your browser.

Professional JSON formatting features

  • Instant beautification: Convert minified JSON to readable format with one click
  • Multiple indentation levels: Choose 2, 3, or 4-space indentation
  • Syntax highlighting: Color-coded keys, values, and structures for clarity
  • Error detection: Identify and highlight JSON syntax errors
  • Key sorting: Optionally sort keys for consistent output
  • Copy and download: Export formatted JSON instantly
  • Tree view: Navigate complex nested structures visually

Common use cases for JSON formatting

Use our JSON beautifier to debug API responses, clean configuration files, validate data structures, and prepare JSON for storage or transmission. Developers use this tool daily to format JSON from APIs, logs, and databases before analysis or integration. Combine with our JSON validator for syntax checking and JSON repair tool for fixing broken data.

Why developers choose our JSON formatter

  • Free, no signup or installation needed
  • Works on all devices and modern browsers
  • Handles large JSON files efficiently
  • Real-time formatting with instant preview
  • Browser-based—your data never leaves your device

Start formatting JSON now with our free online JSON formatter. Trusted by developers worldwide for API debugging, data validation, and configuration management.

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