Décodeur Protobuf en ligne gratuit

Décodez les données binaires Protocol Buffers sans fichier .proto. Gratuit, sans inscription.

Encoded Protobuf

Decoded Fields

About Protobuf Decoder

Protocol Buffers (protobuf) is a binary serialization format developed by Google. This tool decodes raw protobuf binary data without requiring a .proto schema file. It identifies field numbers, wire types, and attempts to interpret values as strings, numbers, or nested messages. Supports hex and Base64 input formats.

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How to Use Protobuf Decoder

Obtain protobuf binary data from network traffic, gRPC calls, or file output
Paste the data as hex bytes (e.g., 08 96 01) or Base64-encoded string
Click decode to parse the binary wire format without needing a .proto schema
Inspect decoded field numbers, wire types, and interpreted values
Use the 'Sample' button to see an example of protobuf decoding

Common Use Cases

Debugging gRPC service communication by inspecting protobuf payloads
Reverse-engineering unknown protobuf messages without schema definitions
Validating protobuf serialization output during development
Inspecting protobuf data captured from network traffic analysis
Understanding protobuf wire format encoding for educational purposes

Frequently Asked Questions

What are Protocol Buffers (protobuf)?

Protocol Buffers is a language-neutral, platform-neutral binary serialization format developed by Google. It's used to serialize structured data for communication between services, data storage, and more. Protobuf is more compact and faster than JSON or XML.

Can I decode protobuf without a .proto schema file?

Yes. This tool performs schema-less decoding by parsing the raw wire format. It identifies field numbers and wire types, and attempts to interpret values as integers, strings, or nested messages. However, without a schema, field names and exact types are unknown.

What is the difference between protobuf and JSON?

Protobuf is a binary format that is smaller (3-10x) and faster to parse than JSON. JSON is human-readable and self-describing. Protobuf requires a schema (.proto file) for proper encoding/decoding, while JSON is schema-optional. Protobuf is preferred for high-performance inter-service communication.

How is protobuf used in gRPC?

gRPC uses protobuf as its default serialization format. Service interfaces and message types are defined in .proto files, which generate client and server code. When gRPC sends data over the network, messages are serialized to protobuf binary format.

What are protobuf wire types?

Protobuf uses wire types to indicate how values are encoded: Varint (0) for integers, 64-bit (1) for fixed64/double, Length-delimited (2) for strings/bytes/nested messages, and 32-bit (5) for fixed32/float. The wire type is encoded alongside the field number in the binary data.

How do I get protobuf data from network traffic?

Use tools like Wireshark, Charles Proxy, or browser DevTools to capture gRPC or HTTP/2 traffic. Extract the protobuf payload bytes and paste them as hex into this decoder. For gRPC-Web traffic, the payload is often Base64-encoded.

Is protobuf binary data safe to paste into this tool?

Yes. All decoding is performed locally in your browser. No data is sent to any server. Your protobuf payloads remain private and are never stored or logged.