JSON to JSON Schema
Generate JSON Schema from any JSON object with AI.
Documenting an API or adding validation to your app? Paste any JSON object and instantly get a JSON Schema (draft-07) with correct types, required fields, and nested object definitions — ready to use with Ajv, OpenAPI, or any validation library.
Paste your code here. Then click Convert.
JSON Schema
How to use this tool?
This online converter harnesses AI to generate JSON Schema definitions from JSON data. Follow these steps:
- Type or paste your JSON object into the input box provided.
- Click the "Convert" button to infer a JSON Schema from the structure.
- View the JSON Schema output in the output box, ready to use for validation.
Example: Simple Function
JSON
{
"name": "Alice",
"age": 30,
"active": true
}
JSON Schema
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"name": { "type": "string" },
"age": { "type": "number" },
"active": { "type": "boolean" }
},
"required": ["name", "age", "active"]
}
Frequently Asked Questions
What is JSON Schema?
JSON Schema is a standard for describing the structure and validation rules of JSON data. It defines expected types, required fields, and constraints. Used in API validation (OpenAPI), config file verification, and form validation libraries.
Which JSON Schema draft is generated?
The tool generates JSON Schema draft-07, which is widely supported by Ajv, joi, Yup, and most modern validation libraries.
Does it handle nested JSON objects?
Yes. Nested objects produce nested 'properties' with their own 'type': 'object' definitions. Arrays produce 'items' schemas based on the element types.
What can I use JSON Schema for?
JSON Schema is used to validate API request/response bodies, generate TypeScript types (with tools like json-schema-to-typescript), document data formats, and validate config files in CI/CD pipelines.
Is the tool free?
Yes, completely free with no account required.