Is my input uploaded?

No. This website tool runs in your browser. Only the optional public API version sends input to the authenticated API route.

Can I use this in an application?

Yes. The Developers documentation lists the authenticated endpoint, request parameters and response example.

Should I verify the result?

Yes. Deterministic tools are designed for repeatable results, but format-specific or heuristic output should still be checked for your use case.

Developer Tools

JSON Schema Generator

Infer a draft 2020-12 JSON Schema from the types and structure of an example JSON value.

Free foreverRuns in your browserNo sign-up

Example JSON

Result

Enter your values and select generate schema.

About the JSON Schema Generator

JSON Schema Generator is a focused browser-based utility. Infer a draft 2020-12 JSON Schema from the types and structure of an example JSON value.

The calculation runs locally in your browser, so the supplied value is not uploaded to ToolsOnDuty. The same capability is also available through the authenticated developer API.

Key features

Fast local processing with explicit validation
Copy-ready structured result
No account, upload or paid data provider required

How to use

1Enter representative valid JSON.
2Choose any available conversion or formatting options.
3Run the tool and review an inferred JSON Schema.

Examples

JSON Schema Generator example

Input: representative valid JSON

Output: an inferred JSON Schema

Frequently asked questions

Is my input uploaded?: No. This website tool runs in your browser. Only the optional public API version sends input to the authenticated API route.
Can I use this in an application?: Yes. The Developers documentation lists the authenticated endpoint, request parameters and response example.
Should I verify the result?: Yes. Deterministic tools are designed for repeatable results, but format-specific or heuristic output should still be checked for your use case.