Convert Protocol Buffers (.proto) to JSON & Schema
Parse proto3 message definitions into mock JSON payloads or Draft-07 JSON Schema specifications.
About This Tool
Protobuf to JSON Schema Converter parses Protocol Buffer (proto3) message definitions, extracting field tags, scalar types, and repeated fields to generate mock JSON objects or Draft-07 JSON Schema specifications.
Key Features
Parses proto3 message { ... } syntax and field tags
Outputs either mock JSON data or Draft-07 JSON Schema
Maps int32, int64, float, double, bool, string, and repeated fields
How to Use
- 1Paste your .proto message definition into the input editor.
- 2Select conversion target: Sample Mock JSON Payload or Draft-07 JSON Schema.
- 3Copy the generated output.
Why Use ToolSnippet Protobuf (.proto) to JSON Schema Converter?
Quickly generate sample REST JSON payloads for testing gRPC-to-JSON gateways.
Generate standard JSON Schema validation files directly from protobuf contracts.
Tips for Best Results
- Use Mock JSON mode to quickly test API endpoints before your gRPC services are fully deployed
Frequently Asked Questions
How are repeated fields handled in Protobuf conversion?
Repeated proto fields are automatically mapped to JSON arrays ([ ... ]) containing sample elements of the designated scalar type.
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