Free JSON Formatter & Validator
Format, validate, and beautify JSON instantly. Fix syntax errors, minify for production, or make it readable.
Valid JSON
Try these examples:
Input JSON
0 charactersFormatted Output
JSON Formatter Features
Our JSON formatter helps developers work with JSON data more efficiently by providing formatting, validation, and optimization tools.
What It Does:
- Validates JSON syntax
- Pretty prints with proper indentation
- Minifies for production use
- Shows detailed error messages
- Calculates size differences
Perfect For:
- Developers: Debug API responses and config files
- QA Testing: Validate JSON data structures
- Data Analysis: Format JSON for readability
- API Development: Test request/response formats
- Configuration: Clean up config files
Common Use Cases:
- Format API responses for debugging
- Validate JSON before deployment
- Minify JSON to reduce file size
- Fix syntax errors in JSON files
- Convert between different indent styles
- Clean up copied JSON data
JSON Formatting Tips
Best Practices
- • Use 2-space indentation for web development
- • Use 4-space indentation for backend configs
- • Minify JSON for production APIs
- • Keep formatted JSON for development
- • Always validate before deployment
- • Use consistent property naming
Common Errors
- • Trailing commas in arrays/objects
- • Single quotes instead of double quotes
- • Missing quotes around property names
- • Undefined values (use null instead)
- • Comments (not allowed in JSON)
- • Missing closing brackets or braces
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