JSON Formatter Tool

Language / 语言 / 言語: English | 简体中文 | 繁體中文 | 日本語

A professional online JSON formatter with beautify, compress, validate and multi-format conversion capabilities. Smart handling of JavaScript objects, single quotes, trailing commas and other non-standard formats.

Features

Core Functions

• JSON Formatting - Format compressed JSON data into readable format with custom indentation
• JSON Compression - Compress JSON data by removing unnecessary spaces and line breaks
• JSON Validation - Validate JSON data syntax correctness with detailed error messages
• Format Conversion - Support conversion between JSON and other formats (YAML, XML, CSV)

Smart Processing

• Allow Unquoted Keys - Supports JavaScript object literal format without requiring quotes for keys
• Allow Single Quotes - Automatically converts single-quoted strings to standard double-quote format with smart escape handling
• Allow Trailing Commas - Supports trailing commas and automatically cleans up unnecessary commas

Use Cases

Development & Debug

Direct copy-paste of JavaScript object code for quick formatting and validation.

Config File Conversion

Convert JS config-like format to standard JSON format.

Code Cleanup

Remove unnecessary trailing commas and standardize quote formats.

Format Standardization

Unify mixed quote formats to standard JSON specification.

Example

Input (Supported Format):

{
  name: 'John Doe',
  age: 30,
  'email': "john@example.com",
  hobbies: ['reading', "coding", 'gaming',],
  address: {
    street: '123 Main St',
    city: 'New York',
  },
}

Output (Standard JSON):

{
  "name": "John Doe",
  "age": 30,
  "email": "john@example.com",
  "hobbies": ["reading", "coding", "gaming"],
  "address": {
    "street": "123 Main St",
    "city": "New York"
  }
}

Technical Features

• Smart Processing Order - Trailing commas → Single quotes → Unquoted keys
• Safe Parsing - Avoids processing special characters within string content
• Full Integration - Supports all function modules (format, compress, validate, convert)
• Real-time Response - Automatically reprocesses when any option changes
• Comprehensive Error Messages - Includes usage instructions for all features
• Backward Compatible - Does not affect existing standard JSON processing

Multi-language Support

The tool supports multiple languages:

• English (en)
• 简体中文 (zh-cn)
• 繁體中文 (zh-tw)
• 日本語 (ja)

Getting Started

1. Paste or enter your JSON data in the input area
2. Select processing options as needed:
   • Allow unquoted keys
   • Allow single quotes
   • Allow trailing commas
3. Choose your desired action:
   • Format - Beautify JSON with proper indentation
   • Compress - Minify JSON by removing whitespace
   • Validate - Check JSON syntax validity
   • Convert - Transform to other formats (YAML, XML, CSV)
4. Copy the result or download as file

User Interface

• Theme Toggle - Switch between light and dark themes
• Language Selection - Choose your preferred language
• Import/Export - Load from file or save results
• One-click Copy - Copy formatted results to clipboard
• Real-time Validation - Instant feedback on JSON validity

Built With

• Modern web technologies for optimal performance
• Responsive design for all devices
• Accessibility-compliant interface
• Progressive web app capabilities

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Boost your development efficiency with our comprehensive JSON processing tool!