Protobuf JSON Converter
Convert JSON to protobuf binary and decode protobuf bytes to JSON using a .proto schema in the browser.
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JSON and protobuf binary with your .proto schema
When you already have a Protocol Buffer definition, converting between JSON and binary is a common debugging step for gRPC gateways and event pipelines. Paste a proto3 message, choose encode or decode, and work with hex output you can copy into packet captures or unit tests.
Inspect schemas with the Grpc Proto Viewer or decode unknown bytes with the Protobuf Binary Decoder.
Frequently Asked Questions
Are proto imports supported?
Not in this browser tool. Paste a self-contained schema or inline imported messages.
Which protobuf version is used?
Encoding follows proto3 semantics via the protobufjs library in the browser.
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