JSON → JSON Schema

Infers a JSON Schema (draft 2020-12) from a JSON sample: types, required keys, nested objects under $defs, integer vs number. A starting point for API validation and OpenAPI.

In: JSON
Out: schema

Root type

interfacetype

omitempty for optional fields

Input · JSON

Open file

Output · schema

Waiting for input

Runs in this tab. The text is not sent anywhere.

Code formatter CSS · JS · HTML
CSS minifier CSS
JavaScript minifier JS
JSON Schema validator JSON · schema → report
API client (Postman online) HTTP request → response
URL parser URL → parts

Questions

Which keys are required?

Those present in every object of the sample. Paste several records, so that optional fields show up as optional.

Related

Questions