📖 JSON Validator & Formatter
JSON (JavaScript Object Notation) is a lightweight data interchange format. This tool helps you validate, format, and minify JSON data instantly. Perfect for developers working with APIs, configuration files, and data exchange.
📐 JSON Syntax Rules
| Rule | ✅ Correct | ❌ Incorrect |
|---|
| Keys in double quotes | {"name":"John"} | {name:"John"} |
| Strings in double quotes | {"city":"Delhi"} | {city:'Delhi'} |
| No trailing commas | [1,2,3] | [1,2,3,] |
| Valid data types | String, Number, Boolean, Null, Object, Array | Undefined, Function |
🔒 Privacy & Security
100% local processing - your data never leaves your device! No upload to any server. Perfect for sensitive data.
💡 How to Use
- Paste JSON in the input box
- Click Validate & Format to check syntax and beautify
- Click Minify to compress for production
- Click Sample to load example JSON
- Keyboard: Ctrl+Shift+F (Format), Ctrl+Shift+M (Minify)
- Error shows exact line and column number
❓ FAQ
❓ What is a JSON Validator? ▼
A JSON Validator checks if your JSON code follows proper syntax rules. Identifies errors like missing quotes, trailing commas, or incorrect data types.
❓ How to fix common JSON errors? ▼
Use double quotes for keys/strings, remove trailing commas, ensure brackets are properly closed, use null instead of undefined. This validator shows exact line numbers.
❓ Is my data secure? ▼
Yes! 100% local processing. Your JSON never leaves your device. No server upload.
❓ Can JSON have comments? ▼
No, standard JSON does not support comments. Remove comments before validation.