JSON Formatter & Validator
Format, validate, and beautify JSON data instantly with syntax highlighting, error detection, and real-time validation. Perfect for developers, API testing, and data processing workflows.
JSON Formatter & Validator
JSON Input
Processed JSON
JSON Syntax Reference
Basic Types
{
"string": "text",
"number": 42,
"boolean": true,
"null": null
}Arrays
{
"fruits": ["apple", "banana"],
"numbers": [1, 2, 3],
"mixed": [1, "text", true]
}Nested Objects
{
"user": {
"name": "John",
"address": {
"city": "NYC"
}
}
}JSON Processing Features
🎨 Format & Beautify
Convert minified JSON to readable format with proper indentation
Pretty-printed JSON✅ Validate & Check
Real-time syntax validation with detailed error messages
Error line detection📦 Minify & Compress
Remove whitespace and reduce file size for production
Compressed output🌈 Syntax Highlighting
Color-coded JSON elements for better readability
Colored syntax📊 JSON Analysis
Statistics about objects, arrays, and data structure
Data insights💾 Export Options
Copy to clipboard or download as .json file
Multiple formatsCommon Use Cases
🔧 API Development
- Format API responses for debugging
- Validate JSON payloads before sending
- Test and verify API data structures
- Debug malformed JSON errors
📱 Frontend Development
- Format configuration files
- Validate component props and state
- Process form data and submissions
- Handle dynamic content structures
🗄️ Data Processing
- Clean and format data exports
- Validate data import formats
- Transform data between systems
- Analyze nested data structures
🧪 Testing & QA
- Verify test data formats
- Format mock API responses
- Validate integration test payloads
- Debug automated test failures
Why Choose Our JSON Tool?
Real-time Validation
Instant error detection as you type with line-by-line feedback
Advanced Formatting
Beautiful syntax highlighting with customizable indentation
Detailed Analytics
Comprehensive statistics about your JSON structure
Privacy Focused
All processing happens locally in your browser
Multiple Export Options
Copy, download, or share formatted JSON easily
100% Free
No registration, limits, or hidden fees
JSON Best Practices
✅ Do's
- Use double quotes for strings
- Follow consistent naming conventions
- Validate before using in production
- Use meaningful property names
- Keep nesting levels reasonable
❌ Don'ts
- Don't use single quotes for strings
- Avoid trailing commas
- Don't include undefined values
- Avoid circular references
- Don't mix data types unnecessarily
Frequently Asked Questions
What makes JSON invalid?
Common JSON errors include missing quotes around strings, trailing commas, unescaped special characters, missing brackets or braces, and incorrect nesting.
Can I format large JSON files?
Yes! Our tool can handle large JSON files efficiently. All processing happens in your browser, so there are no server-side size limitations.
How does JSON minification help?
Minification removes unnecessary whitespace and reduces file size by 20-40%, improving load times and reducing bandwidth usage in production applications.
Is this tool good for learning JSON?
Absolutely! The syntax highlighting, real-time validation, and detailed error messages make it an excellent tool for learning JSON syntax and best practices.