JSON Schema Generator
Generate JSON Schema automatically from your data. Create validation schemas for APIs, forms, and documentation.
About JSON Schema
JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. This tool automatically generates a JSON Schema from your data, which you can use for validation, documentation, and code generation.
About JSON Schema Generation
What You Can Do With JSON Schema
- Validate Data: Ensure your JSON conforms to a specific structure
- Document APIs: Create clear specifications for request/response formats
- Generate Forms: Automatically create forms based on your schema
- Enable IDE Features: Get autocompletion and validation in code editors
Popular Use Cases
- API Development: Define and validate request/response formats
- Configuration Files: Validate application configurations
- Data Modeling: Document database schemas and data structures
- Testing: Create test cases and validate responses
What is JSON Schema?
JSON Schema is a powerful tool for validating the structure of JSON data. It's a JSON-based format for defining the structure, content, and semantics of JSON documents.
Key Benefits of JSON Schema
- Validation: Ensure your JSON data conforms to a specific structure
- Documentation: Self-documenting format for APIs and data models
- Code Generation: Generate code, forms, and documentation from schemas
- IDE Support: Many editors provide autocompletion based on JSON Schema
- Testing: Create test cases and validate responses against schemas
Common Use Cases
- API Development: Define request and response formats
- Configuration Files: Validate configuration files against a schema
- Data Modeling: Document data structures in a standardized way
- Form Generation: Automatically generate forms from schemas
- Data Validation: Validate user input or imported data
Key JSON Schema Keywords
Core Keywords:
type: Specifies the data typeproperties: Defines object propertiesrequired: Lists required propertiesitems: Defines array item schemaenum: Lists allowed values
Validation Keywords:
minimum/maximum: Number rangeminLength/maxLength: String lengthpattern: Regex pattern for stringsformat: Predefined formats (email, date, etc.)uniqueItems: Ensures array items are unique
Schema Versions
JSON Schema has evolved through several drafts. The most commonly used versions are:
- Draft-07 (2017): Widely supported and stable
- Draft 2019-09: Added new features and improvements
- Draft 2020-12: Latest version with enhanced functionality
Our generator uses Draft-07 for maximum compatibility.
How Our Generator Works
Our JSON Schema generator analyzes your JSON data and infers a schema that matches its structure. It:
- Detects data types for all values
- Identifies required properties
- Handles nested objects and arrays
- Adds examples from your actual data
- Generates descriptions for better documentation
The generated schema can be customized using the options provided and can be used for validation, documentation, or as a starting point for more detailed schemas.
Frequently Asked Questions
JSON Schema is a vocabulary that allows you to annotate and validate JSON documents. It describes your existing data format with clear, human- and machine-readable documentation for validation, documentation, and interaction control.