INFER · VALIDATE · GENERATE

Turn JSON into a usable schema.

Infer JSON Schema from real payloads, validate JSON against a schema, and generate example JSON from the schema — all locally in your browser.

Local processing only

JSON Input

Source payload for inference or validation

JSON

JSON Schema

Generated or pasted schema

Draft 2020-12

Local validator supports common keywords including type, properties, required, items, enum, const, minimum, maximum, pattern, format, anyOf, oneOf, allOf, and additionalProperties: false.

0Properties

0Required

0Schema depth

0Validation issues

Generate or paste a schema, then run Validate.