JSON Schema Generator
About JSON Schema Generator
Paste a sample JSON object and the generator infers a JSON Schema automatically — working out the type of each field, which properties are required, and how arrays and nested objects are structured. The output follows the draft-07 format, so you can drop it straight into API validation, form generation, or documentation. Because the inference runs entirely in your browser, you can safely paste real response payloads and config samples without sending them anywhere.
How To Use
- Paste a representative sample of your JSON data into the input.
- Generate the schema. The tool infers each field's type, marks required properties, and handles nested objects and arrays.
- Copy the resulting draft-07 JSON Schema and use it for validation, documentation, or code generation.
Example
Input: A sample API response payload with nested objects and an array of items.
Output: A draft-07 JSON Schema describing each property's type, required fields, and nested structure.
Who Uses JSON Schema Generator
- API developers and backend engineers inferring schemas from sample payloads for validation.
- Teams documenting data contracts or generating forms from JSON examples privately.
- Anyone working with real API responses who needs accurate schemas without sending data to external tools.
Frequently Asked Questions
What is a JSON Schema used for?
A JSON Schema describes the expected shape of JSON data — which fields exist, their types, and which are required. It is used to validate API requests and responses, generate forms and types, and document data contracts between services.
Which JSON Schema draft does this generate?
Draft-07, the most widely supported version across validators, code generators, and documentation tools.
Does it upload my JSON?
No. The schema is inferred entirely in your browser. Nothing you paste is sent to a server, so it is safe to use with real or sensitive payloads.
Can it handle nested objects and arrays?
Yes. The generator recurses into nested objects and inspects array items to infer their element type, so deeply structured JSON is handled correctly.