JSON Formatter & Validator
Format, validate, and minify JSON instantly. 100% client-side processing - your data never leaves your browser.
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Input JSON
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Format & Beautify
Make JSON readable with proper indentation
Validate
Check if your JSON is valid with detailed errors
Minify
Remove whitespace to reduce file size
💡 JSON Tips
- • Use double quotes for strings, not single quotes
- • Property names must be in double quotes
- • No trailing commas allowed in JSON
- • Valid types: string, number, boolean, null, object, array
- • Use online validators for large files
- • Minify JSON before deploying to production
100% Client-Side Processing
All JSON processing happens in your browser. Your data is never sent to our servers, ensuring complete privacy and security for sensitive information.
Common Use Cases
🐛 Debugging API Responses
Quickly format minified API responses to understand their structure and debug issues.
{"status":"success","data":{...}}📝 Config File Formatting
Format configuration files for better readability and maintenance.
package.json, tsconfig.json, settings.json🗜️ Production Minification
Minify JSON files before deploying to production to reduce file size and improve performance.
Reduces file size by 30-50%✅ Validation & Testing
Validate JSON syntax before using it in your application to catch errors early.
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JSON Quick Reference
What is JSON?▼
JSON (JavaScript Object Notation) is a lightweight data interchange format that's easy for humans to read and write, and easy for machines to parse and generate.
It's based on a subset of JavaScript but is language-independent, making it ideal for data exchange between different systems and programming languages.
JSON Syntax Rules▼
- • Data is in name/value pairs
- • Data is separated by commas
- • Curly braces hold objects
- • Square brackets hold arrays
- • Property names must be in double quotes
- • String values must be in double quotes
- • No trailing commas allowed
- • Numbers can be integer or floating point
Common JSON Errors▼
- • Trailing comma: Remove commas after the last item in objects/arrays
- • Single quotes: Use double quotes for strings
- • Unquoted keys: Property names must be in double quotes
- • Missing commas: Separate items with commas
- • Unclosed brackets: Ensure all brackets are properly closed
- • Invalid values: Only use string, number, boolean, null, object, array
JSON Data Types▼
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