JSON Schema Generator from a JSON Example
Generate a JSON Schema (draft 2020-12) from a JSON example, right in your browser.
🔒 100% client-side — no data sent
Automatically generate a JSON Schema from a plain JSON data example, with type, property and array detection. The analysis runs 100% in the browser with no data sent, for a fast and private result.
What is it for?
- ▸ Document the structure of an API response
- ▸ Automatically validate data received from a form
- ▸ Create a data contract between front and back end
- ▸ Provide a starting schema you then refine by hand
FAQ
What is a JSON Schema?
A JSON Schema is a document that describes the expected structure of a JSON file: field types, required properties and value formats. It is used to automatically validate that data matches the intended format.
Is the generated schema ready to use?
It provides a solid base inferred from your example, but it cannot guess your business rules. Remember to adjust required fields, descriptions and value constraints to match your real needs.
Which JSON Schema version is used?
The tool produces a schema compatible with the widely adopted drafts of the JSON Schema standard. You can then set the exact version through the $schema field if your validator requires a specific one.