Our JSON Schema Generator is a free online tool that automatically generates JSON Schema from sample JSON. Perfect for API documentation, data validation, and ensuring consistent data structures.
Use our JSON Schema Generator to create schemas instantly. Supports JSON Schema Draft 7 and OpenAPI formats. Validate JSON against schemas. No signup required, 100% free.
Features
Automatic Generation
Analyzes your JSON and generates a complete schema automatically
Multiple Formats
Supports JSON Schema Draft 7 and OpenAPI Schema formats
Built-in Validator
Validate any JSON against your generated schema
Smart Detection
Automatically detects types, formats (email, URI, date), and required fields
How It Works
Paste Your JSON
Paste your sample JSON object or array into the generator
Choose Format
Select JSON Schema Draft 7 or OpenAPI Schema format
Generate Schema
Click Generate and get your complete JSON Schema instantly
Validate & Download
Validate JSON against your schema, copy, or download the schema file
Example: JSON Schema Generation
Sample JSON:
{
"name": "John Doe",
"email": "john@example.com",
"age": 30,
"active": true
}Generated JSON Schema (Draft 7):
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"name": { "type": "string" },
"email": { "type": "string", "format": "email" },
"age": { "type": "integer" },
"active": { "type": "boolean" }
},
"required": ["name", "email", "age", "active"]
}Generate JSON Schema Instantly
Use our free JSON Schema Generator to create schemas from your JSON in seconds. No coding required.