JSON to Protobuf

About JSON to Protobuf

This tool converts JSON structures into .proto definitions with version selection, naming controls, type mapping, and export utilities.

Key Features

• Version Modes: proto2 and proto3 style settings.
• Naming Controls: Package name and message prefix.
• Type Mapping: Configurable string/integer/float/boolean mappings.
• Generation Toggles: Optional fields and optimization-related options.
• Stats Panel: Message/field/enum/nested counts.
• Export: Copy and download .proto output.

Steps

1. Choose protobuf version and package.
2. Paste JSON sample.
3. Configure mapping and generation options.
4. Review .proto output and stats.
5. Copy/download result.

Use Cases

• gRPC schema prototyping.
• Migrating JSON contracts to protobuf.
• Sharing consistent message models across services/clients.

FAQ

Why are arrays/nested objects generated unexpectedly?

Deep structures trigger nested message inference; use more consistent sample shapes.

How to choose proto2 vs proto3?

proto3 is common for new projects; use proto2 when you need finer field semantics.