JSON Validator & Formatter
Validate and format your JSON data with syntax highlighting and error detection.
Size: 0 bytes | Objects: 0 | Arrays: 0
Features
JSON Validation
Instantly validate JSON data and detect syntax errors.
Smart Formatting
Format JSON with customizable indentation and sorting.
Tree View
Visualize JSON structure in an interactive tree view.
JSON Minification
Reduce file size by removing unnecessary whitespace.
JSON Data Validation & Formatting Tool
Essential tool for developers working with JSON data. Features include:
Key Features
- Real-time syntax validation with error pinpointing
- Advanced JSON formatting with customizable indentation
- Syntax highlighting for key/value pairs
- Collapsible tree view for complex structures
- Support for JSON/JSON5/JSONP formats
- Character encoding validation
- Dark/light mode display options
Why Validate JSON?
- Ensure API response integrity
- Prevent application crashes from malformed data
- Improve data debugging efficiency
- Maintain consistent data structures
- Identify hidden encoding issues
FAQs
How does the validator detect errors?
Advanced parser identifies missing commas, brackets, and syntax violations with line-number precision.
Can I format minified JSON from APIs?
Yes - paste any minified JSON to instantly beautify it with proper indentation.
Is there a file size limit?
Process JSON files up to 10MB directly in your browser.
Does it store my data?
No data is transmitted or stored - processing occurs locally.
Supports JSON with comments?
Yes, handles JSONC (JSON with JavaScript-style comments).
Common Use Cases
- API response validation
- Configuration file checking
- Data migration preparation
- Educational JSON analysis
- Debugging complex nested data
Developer Tips
- Validate before implementing new API endpoints
- Use formatted JSON for documentation
- Check for trailing commas in arrays/objects
- Verify consistent quotation usage
- Analyze data structure with tree view