Validate your JSON data against JSON Schema (Draft-07 and newer) with detailed error reporting and instant feedback. Ensure your JSON meets specific structure and type requirements.
What is JSON Schema?
JSON Schema is a vocabulary for validating, annotating, and documenting JSON data. It defines the structure, data types, required fields, and constraints that your JSON must follow.
Common use cases include API request/response validation, configuration file verification, data quality assurance, form data validation, and database schema enforcement. By validating against a schema, you can catch data errors early, ensure data consistency, and reduce debugging time.
What You Can Validate
JSON Schema supports a range of validation rules:
- Data Types: Ensure fields are strings, numbers, booleans, arrays, or objects
- Required Fields: Verify all mandatory properties are present
- String Patterns: Validate emails, URLs, dates with regex patterns
- Number Ranges: Set minimum, maximum, and exclusive bounds
- Array Constraints: Control array length, item types, and uniqueness
- Enum Values: Restrict values to specific options
How to Use Schema Validation
- 1Paste your JSON data into the main editor
- 2Click the Schema button in the toolbar to open the schema panel
- 3Enter your JSON Schema or choose from example schemas
- 4Click Validate Schema to check your JSON against the schema
- 5Review detailed error messages showing exactly what failed validation
Example Schemas Included
JSON Copilot includes ready-to-use example schemas to help you get started:
- • User Profile: Validate user data with name, email, age
- • Product Catalog: Ensure products have required pricing and details
- • API Response: Validate standard REST API response structures
- • Configuration File: Check app config format and required settings
Privacy & Technical Details
Schema validation happens entirely in your browser using the industry-standard Ajv (Another JSON Schema Validator) library. No server processing is needed for schema validation.
We support JSON Schema Draft-07 and newer specifications with fast validation powered by the Ajv library. Error reporting provides detailed messages with JSON paths pointing directly to validation failures.