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JSON Formatter & Validator
Format, validate, and beautify JSON data online. Free JSON formatter with syntax highlighting, error detection, and multiple formatting options.
About JSON Formatter & Validator
This free online JSON formatter helps you validate, format, and beautify JSON data instantly. Whether you’re debugging API responses, cleaning up configuration files, or learning JSON syntax, this tool makes working with JSON easy.
Key Features
- Instant Validation: Detects JSON syntax errors with helpful error messages
- Multiple Formats: Choose between 2-space, 4-space, or tab indentation
- Compact Mode: Minify JSON by removing whitespace
- Copy to Clipboard: One-click copying of formatted output
- Syntax Highlighting: Easy-to-read color-coded JSON
- No Data Storage: All processing happens in your browser
Common Use Cases
- Format API responses for readability
- Validate JSON configuration files
- Debug malformed JSON data
- Minify JSON for production
- Learn JSON syntax and structure
FAQ
Is my data safe? Yes! All JSON processing happens entirely in your browser. Your data never leaves your device.
What’s the maximum size? While there’s no hard limit, very large JSON files (>10MB) may impact performance.
Can I format multiple JSON objects? The tool expects a single valid JSON value (object, array, string, number, boolean, or null).