What Protobuf features are generated?

The tool generates Protobuf message definitions with proper field types (string, int32, int64, double, bool, repeated, nested messages) and automatic field numbering.

Does it support nested messages?

Yes, nested JSON objects are converted to separate Protobuf message definitions.

Is the output compatible with gRPC?

Yes, the generated Protobuf schema can be used with gRPC for service definitions and message serialization.

JSON to Protobuf - Online Protocol Buffers Generator

Convert JSON data to Protocol Buffers .proto message definitions with field numbering and type mapping.

How to Use

Paste your JSON data into the left input box.
Optionally modify the message name (default is Model).
Click the "Convert" button to generate .proto message definitions.
Click "Copy Result" to copy the output to your clipboard.

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About JSON to Protobuf

This tool helps you quickly convert JSON data to Protocol Buffers (.proto) message definitions. Protocol Buffers is a language-neutral serialization mechanism developed by Google, widely used for gRPC service communication and data storage. Writing .proto files manually is tedious and error-prone. This tool automatically generates accurate message definitions.

Simply paste JSON data and the tool will automatically analyze the JSON structure and generate corresponding .proto message definitions. Supports nested messages, arrays (repeated fields), integer/float/boolean/string type mapping, and automatic field number assignment to help you quickly build Protocol Buffers data models.