How to Use JSON Schema Validator - Step by Step Guide
Input Your JSON Data
Start by providing your JSON data that you want to validate. Whether you're validating API responses, checking configuration files, or ensuring data quality, you have multiple options:
Provide Your JSON Schema
Enter your JSON Schema that defines the structure and validation rules. The validator supports all JSON Schema specifications:
Review Validation Results
The validator automatically checks your JSON against the schema and provides instant feedback. Results include detailed error messages:
Step 4: Fix Validation Errors
Use the detailed error messages to fix issues in your JSON data. Each error shows the exact path and reason for failure. You can also format your JSON for better readability or use our JSON validator to check basic syntax first.
Step 5: Export Validation Report
Save or share your validation results for documentation, testing, or team review. Perfect for RFC-compliant validation workflows:
Frequently Asked Questions
What is JSON Schema validation?
JSON Schema validation checks if your JSON data conforms to a predefined schema that specifies the structure, data types, required fields, and validation rules. It's like a contract that ensures your data meets specific requirements before being processed or stored.
Which JSON Schema versions are supported?
Our validator supports all major JSON Schema versions including Draft 7 (most widely used), Draft 2019-09, and Draft 2020-12. The validator automatically detects the schema version from the $schema property or uses Draft 7 as the default.
What types of validation errors does it detect?
The validator detects type mismatches, missing required fields, invalid formats (email, uri, date-time), string length violations, number range errors, array size issues, pattern mismatches, enum violations, and nested object/array validation failures. Each error includes the exact path and detailed explanation.
Can I validate nested objects and arrays?
Yes! The validator handles deeply nested JSON structures including nested objects, arrays of objects, arrays of arrays, and complex mixed structures. Validation errors show the complete path to the problematic field using dot notation and array indices. You can also generate schemas from existing JSON.
Is the JSON Schema validator free to use?
Yes, completely free with no limitations on JSON size, schema complexity, validation frequency, or features. No registration required. Validate unlimited JSON data against schemas with full error reporting and support for all JSON Schema features at no cost.