JSON Validator
Validate JSON syntax and check for errors instantly with this free online JSON validator. This tool helps developers identify syntax errors, missing commas, unclosed brackets, and other common JSON issues before they cause problems in production.
Enter JSON and click Validate to check syntax
How to use:
- •Paste your JSON code in the input field
- •Click "Validate" to check for syntax errors
- •The tool will identify missing commas, unclosed brackets, and other common JSON issues
- •Fix any errors and validate again until your JSON is valid
About This Tool
JSON (JavaScript Object Notation) is a lightweight data-interchange format that's easy for humans to read and write, and easy for machines to parse and generate. However, JSON has strict syntax rules, and even small errors can cause parsing failures. This validator checks your JSON for syntax errors, missing commas, unclosed brackets, incorrect quotes, and other common issues, helping you debug JSON data before using it in APIs, configuration files, or data processing.
Use Cases
- •API development: Validate JSON responses from APIs before processing
- •Configuration files: Check JSON config files for syntax errors
- •Data validation: Verify JSON data before storing in databases
- •Debugging: Identify and fix JSON syntax errors quickly
- •Code review: Validate JSON in pull requests and code reviews
- •Data migration: Ensure JSON data is valid before migration
- •Frontend development: Validate JSON before parsing in JavaScript
Examples
Valid JSON object with proper syntax
Input:
Output:
Common error: missing comma between properties
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Output:
Common error: missing closing brace
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Output:
Valid JSON with nested array
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Output: