JSON to Proto
Generate a proto3 message draft from a JSON sample, inferring fields, arrays, and nested objects for gRPC and Protobuf schema planning.
Paste a JSON sample and generate a proto3 message draft that maps fields, nested objects, and repeated arrays.
Useful for gRPC modeling, Protobuf schema drafts, REST model migration, and API field discussions. Review generated output before production use.
Paste your content on the left, run the conversion, and copy the result from the output box.
JSON Sample
Proto Output
Common use cases
- Use this page when an API response sample needs to become a first draft of a proto3 message for gRPC or Protobuf modeling.
- It helps backend, client, and QA teams discuss field structure faster by turning a JSON example into a schema-shaped starting point.
- When migrating a REST data model toward Protobuf, this page is useful for mapping fields, nested objects, and arrays before manual refinement.