JSON Schema Generator & Validator
Convert JSON data to JSON Schema format with this free online tool. Automatically generate accurate JSON Schema definitions that validate your data structure. Save development time and ensure consistent data validation across your applications.
About JSON Schema Generator Tool
Simply paste your JSON data, configure your options, then click "Generate Schema". The tool will instantly create an appropriate JSON Schema definition that describes and validates your data structure.
Input Options
Currently supporting JSON input format. For best results, provide a complete sample of your data structure that includes all possible field values and nested objects.
Output Options
Generate standard-compliant JSON Schema definitions. The "Treat all strings as StringType" option prevents automatic type inference for strings, ensuring strict validation.
Key Features
- JSON Input Support: Paste or upload your JSON data for instant schema
generation
- Complete Schema Output: Generate standard-compliant JSON Schema definitions
- Automatic Type Detection: Intelligently infers data types from your sample
data
- Complex Structure Support: Handles nested objects and arrays with proper
schema representation
- Strict String Mode: Option to treat all values as strings when needed
- One-Click Generation: Transform your data structure into schema format
instantly
Frequently Asked Questions
What is JSON Schema?
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, provides complete structural validation, and can be used for testing and data validation.
Why use a JSON Schema Generator instead of writing schemas manually?
Manual schema definition is time-consuming and error-prone, especially with complex data structures. This tool automatically generates accurate JSON Schema documents in seconds, saving development time and reducing the risk of errors.
How does the automatic type detection work?
The tool analyzes your sample JSON data to determine appropriate data types. For example, it detects strings, numbers, booleans, objects, and arrays based on the values in your JSON document.
Can it handle nested structures?
Yes, the generator automatically detects nested objects and arrays and creates the appropriate schema definitions, including proper nesting and references as needed in the resulting JSON Schema.
What version of JSON Schema does this tool generate?
The tool generates JSON Schema compatible with the latest stable Draft-07 specification by default, ensuring broad compatibility with most JSON Schema validators and tools.