JSON to Protobuf Schema Generator

Summary

Paste JSON and get a proto3 message definition with field types inferred from your data.

How it works

1. Paste sample JSON
2. Click Generate Proto
3. Review inferred field types
4. Copy the .proto output

Use cases

• Bootstrapping gRPC message types from REST payloads
• Migrating JSON APIs to Protobuf serialization
• Creating proto schemas for Kafka topics

Frequently Asked Questions