JSON Formatter
Beautify, minify, validate, and convert JSON to TypeScript. Secure client-side processing — your data never leaves your browser.
Input JSON
Result will appear here...
How JSON Formatting Works
Prettify & Beautify
Transform compact JSON into readable, indented format with proper line breaks. Essential for debugging API responses and understanding complex data structures at a glance.
Minify & Compress
Remove all whitespace and formatting to create the smallest possible JSON string. Perfect for reducing payload sizes in production APIs and saving bandwidth.
TypeScript Generation
Automatically generate TypeScript interfaces from any JSON structure. Handles nested objects, arrays, and edge cases to create type-safe code instantly.
Use Cases
API Development
Format API responses to understand structure and debug issues quickly.
Config Validation
Validate package.json, tsconfig.json, and other config files for syntax errors.
Type Safety
Generate TypeScript interfaces from API contracts for type-safe development.
Data Migration
Inspect and validate JSON data structures before database imports.
Common JSON Errors
| Error Type | Example | Solution |
|---|---|---|
| Trailing Comma | {"a": 1,} | Remove comma after last item |
| Single Quotes | {'key': 'value'} | Use double quotes only |
| Unquoted Keys | {key: "value"} | Wrap keys in double quotes |
| Missing Comma | {"a": 1 "b": 2} | Add comma between key-value pairs |
| Unescaped Characters | {"text": "line1
line2"} | Escape special characters with backslash |