Kafka Schema Explorer

Browse, register, and evolve Avro, Protobuf, and JSON schemas. Preview draft changes as you type. Generate mock payloads or validate JSON against any registered version.

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Kafma Schema Explorer listing Avro, Protobuf, and JSON schemas with their latest and active versions

Register Avro, Protobuf, or JSON schemas

Register the first version through a clear form for schema definition, subject naming, and references.

Kafma registering an Avro schema with a Topic Name strategy and an automatically generated subject name

Draft schema versions with a live diff

Edit beside the base version and see every addition or removal as you type.

Kafma comparing a base Avro schema with an editable draft and highlighting changes before publishing a new version

Generate mock data from your schema

Generate JSON samples from any Avro, Protobuf, or JSON Schema version, with references resolved automatically.

Kafma generating sample JSON from version 1 of an Avro schema in the Mock tab

Test payloads against any schema version

Paste a JSON payload beside the schema and see which field fails and why.

Schema Registry docs
Kafma Schema Lab identifying an invalid currency enum value in a JSON payload tested against version 1 of an Avro schema

Ready to try the Kafka Schema Explorer?

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Available for macOS, Windows, Linux