Sample JSON in. JSON Schema out.

Walks any JSON, infers types and string formats (email, uri, uuid, date, date-time, ipv4, hostname), detects enums from repeated literals, and merges multiple sample documents into one schema that validates all of them.

● Offline No network JSON Schema draft 2020-12 8 format detectors

Mark keys present in all samples as required Detect format (email, uri, date-time…) Enum from ≤8 distinct strings Allow additionalProperties

Sample JSON (paste one object, an array of samples, or NDJSON)

Generated JSON Schema (draft 2020-12)

paste JSON to generate