Protobuf to JSON Schema
// Convert Protobuf definitions to JSON Schema
#About Protobuf to JSON Schema
Free online Protobuf to JSON converter. Parse Protocol Buffer message definitions and generate JSON Schema or example JSON with proper type mappings. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
#FAQ
What protobuf types are mapped? ▾
The converter maps string→string, int32/int64→integer, float/double→number, bool→boolean, bytes→base64 string, repeated fields→arrays, nested messages→nested objects, and enums→string enums.
Does it support proto3 syntax? ▾
Yes, the tool parses proto3 message definitions including nested messages, enums, repeated fields, map types, and oneof constructs.
</> Embed this tool ▾
Copy this code to embed the tool on your website. Adjust the height to fit your layout.
<iframe src="https://www.browserutils.dev/embed/protobuf-to-json" width="100%" height="500" frameborder="0" title="Protobuf to JSON Schema"></iframe>