JSON Schema Generator from a JSON Example
Create a starter JSON Schema from sample data. Review types, required fields and business rules against your real contract.
This guide and page information are in English. Some controls inside the interactive tool currently appear in Turkish.
This tool processes its main input in your browser and does not send it to an external API. Fonts and interface assets may load from external providers.
JSON Schema Generator from a JSON Example
The JSON Schema generator creates a starting validation schema from fields and value types in a sample object. It can help begin an API document or data-contract draft.
One example may not represent every valid case. Review nulls, optional fields, array items and boundary conditions before relying on a generated schema.
How to use it
- Enter a representative JSON sample.
- Review field types and the generated required list.
- Test validation with multiple valid examples and expected invalid values.
Example
Input: {"name":"Ada","active":true}
Output: A starter schema with name as string and active as boolean.
Who is it for?
- Teams documenting data contracts
- Developers validating API payloads
- Students learning JSON Schema
Privacy and limitations
The sample and schema are processed in this browser; input is not sent to an API. Prefer anonymized test data to production records.
JSON Formatter and Validator: Fix Common Syntax Errors
Frequently asked questions
Does the generated schema capture every rule?
No. A sample reveals fields and types it contains; business rules, ranges and edge cases still need review.
Should a field be required?
That depends on your contract. Check representative records and decide whether omission is valid.
Is one sample enough?
Usually not. Review nulls, empty arrays, missing fields and boundary values.
Is my JSON sent to a server?
The starter schema is created in this page and sample data is not sent to an external API for the operation.