Parse, validate and format JSON strings with detailed error reporting.
json
parser
validator
formatter
Formatting Options
Actions
About JSON Parse Validator & Formatter
This free online JSON parse validator and formatter tool helps you validate, parse, and format JSON data using JavaScript's native JSON.parse() method. Perfect for API development, debugging, and ensuring JSON data integrity.
Key Features
Real-time JSON validation using JavaScript's JSON.parse() method
Auto-validation to check JSON syntax as you type
Formatting options with customizable indentation or minification
Detailed error detection with specific syntax error messages
Visual feedback with color-coded validation status badges
Copy to clipboard or download formatted JSON as files
Auto-save functionality for session persistence
Manual validation mode for on-demand checking
Use Cases
API development for validating JSON payloads and responses
Configuration file validation to check JSON config syntax
Data processing to ensure JSON data integrity before use
Debugging to identify and fix JSON syntax issues
Code review preparation with proper JSON formatting
Learning JSON structure and understanding syntax rules
Supported Formats
JSON (JavaScript Object Notation)
Formatted JSON with Custom Indentation
Minified JSON Output
RFC 7159 Compliant JSON
Nested Objects and Arrays
All JSON Data Types
Related Keywords
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Validation Note
This tool uses JavaScript's native JSON.parse() method, which follows the strict JSON specification. Some JSON-like formats (like JavaScript object literals) may not be valid JSON and will show errors.
Privacy & Security
All processing happens locally in your browser. Your data never leaves your computer, ensuring complete privacy and security.
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