JSON Formatter & Validator – Pretty Print and Validate JSON
JSON (JavaScript Object Notation) is the standard data format for APIs, configuration files, and data exchange. However, JSON is often minified (compressed without whitespace) or contains syntax errors that make it difficult to read and debug. The JSON Formatter & Validator by ToolfolioHub validates JSON syntax, identifies errors, and pretty-prints formatted output for easy reading.
Whether you're debugging API responses, validating configuration files, or formatting JSON for documentation, this tool makes JSON readable and error-free.
Why Format JSON?
Formatted JSON offers several benefits:
- Readability: Indentation and line breaks make structure clear
- Debugging: Easier to spot syntax errors and data issues
- Documentation: Pretty-printed JSON is easier to explain
- Code Review: Formatted JSON is easier to review
Key Features
1. Syntax Validation
Validates JSON syntax and reports specific errors:
- Missing commas or brackets
- Invalid characters
- Unclosed strings or objects
- Trailing commas (if not supported)
2. Pretty Printing
Formats JSON with:
- 2-space indentation
- Proper line breaks
- Consistent formatting
3. Copy Functionality
One-click copy to clipboard for easy use in other applications.
How to Use the JSON Formatter
- Paste JSON: Enter raw or minified JSON into the textarea
- Format: Click "Format JSON" to validate and format
- Review: Check formatted output or error messages
- Copy: Copy formatted JSON if needed
Common JSON Errors
- Trailing Commas: Commas after last array/object items (invalid in strict JSON)
- Unclosed Quotes: String values not properly closed
- Missing Commas: Missing commas between object properties or array items
- Invalid Characters: Special characters not properly escaped
Conclusion
The JSON Formatter & Validator is an essential tool for developers working with JSON. By validating syntax and pretty-printing output, it makes JSON readable and debuggable.