JSON Formatter, Editor & Validator

A powerful online JSON editor with syntax highlighting, validation, and formatting capabilities. Perfect for developers working with JSON data.

Supports JSON5 syntax with comments and trailing commas

Features

RFC 8259 Compliance

100% compliant with official JSON specifications

JSON Schema Validation

Real-time validation against JSON Schema

JSON5 Support

Support for comments, trailing commas, and more

Real-time Error Checking

Instant feedback on syntax errors

Interactive Tree Viewer

Visualize and navigate JSON structure

Cross-platform Compatibility

Works seamlessly across all modern browsers

JSON Search & Navigation

Find and jump to specific JSON paths

Frequently Asked Questions

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format. Here's a basic example:

{
  "name": "John Doe",
  "age": 30,
  "isStudent": false,
  "hobbies": ["reading", "swimming"],
  "address": {
    "city": "New York",
    "country": "USA"
  }
}

JSON is language-independent and widely used for transmitting data in web applications.

How do I format JSON?

Our formatter beautifies your JSON for better readability:

Unformatted JSON:

{"name":"John","age":30,"city":"New York"}

Formatted JSON:

{
  "name": "John",
  "age": 30,
  "city": "New York"
}

Click the 'Format' button to automatically beautify and properly indent your JSON data.

Can I validate my JSON?

Our editor validates JSON in real-time and highlights errors:

Valid JSON:

{
  "valid": true,
  "numbers": [1, 2, 3],
  "nested": {
    "property": "value"
  }
}

Common Errors:

{
  'invalid': 'single quotes',  // Error: Use double quotes
  "trailing": "comma",     // Error in standard JSON
  "missing": quote"        // Error: Invalid syntax
}

The validation report shows exactly where errors occur in your JSON.

Does this editor support JSON5?

Yes, our editor supports JSON5 with additional features:

{
  // Comments are allowed in JSON5
  name: 'Quotes are optional for strings',
  numbers: [1, 2, 3,], // Trailing commas allowed
  hex: 0xF1A7,        // Hexadecimal numbers
  infinity: Infinity,  // Special numbers
  multiline: 'This is a\
            multiline string'
}

These features make JSON5 more convenient for configuration files.

How can I use the JSON editor?

Here's a quick guide to using our editor:

  1. Input JSON:
{
  "example": "Your JSON here"
}
  1. Use Features:
  • Format: Click 'Format' for proper indentation
  • Validate: Real-time error checking
  • Tree View: Navigate complex structures
  • Search: Find specific values
  1. Keyboard Shortcuts:
  • Ctrl + S: Save
  • Ctrl + Shift + F: Format
  • Ctrl + Space: Auto-complete
How to create a JSON file?

Create and export JSON files in these simple steps:

  1. Enter your data:
{
  "project": "My App",
  "version": "1.0.0",
  "settings": {
    "theme": "dark",
    "notifications": true
  }
}
  1. Validate your JSON using our real-time checker
  2. Format for readability
  3. Click Export to download as a .json file

Your file will be saved with proper formatting and UTF-8 encoding.