JSON Schema validator

Validate JSON against a JSON Schema (drafts 4 to 2020-12), or generate a starting schema from sample JSON.

JSON

Try:

Schema

Leave empty to generate a schema from the JSON.

Required properties

additionalProperties: false

Detect formats

date-time, date, email, uuid, uri, ipv4

Generated schema

Validation runs in your browser with @cfworker/json-schema. Only references inside the schema are resolved; nothing is downloaded.