What JSON Schema Generator does
Infer JSON Schema 2020-12 types, required properties, array shapes, formats, unions, and optional enum candidates.
Also searched as schema, generate schema, infer schema, json schema, draft 2020-12, model, structure, json to schema.
01
Profile one document or a sample array
02
Merge observed field types
03
Emit editable JSON Schema
Samples change requiredness
When a root array is treated as samples, only fields present in every record are marked required; conflicting types become unions.
JSON Schema Generator FAQ
Does jsontools.me upload my JSON?
No. The document is parsed and processed by json-buf inside a dedicated WebAssembly worker on your device.
Does it work offline?
Yes. After the application shell and engine have loaded once, the installable PWA keeps the tools available without a network connection.