About Protobuf Decoder
Decodes any Protobuf encoded data to a JSON representation of the data using the field number as the field key. If a .proto schema is defined, the encoded data will be decoded with reference to the schema. Only one message instance will be decoded. Show Unknown Fields When a schema is used, this option shows fields that are present in the input data but not defined in the schema. Show Types Show the type of a field next to its name. For undefined fields, the wiretype and example types are shown instead.
Input: binary bytes (text input uses UTF-8; a file retains its original bytes). Output: structured JSON.
Format reference: Protobuf Decode background and specification
Example
Use “Try example” to load this public sample and its settings, then run it.
Settings used in this example
| Parameter | Example value | Input and choices |
|---|---|---|
| Schema (.proto text) | "" | Enter the .proto schema that defines message types and field names. |
| Show Unknown Fields | false | On or off |
| Show Types | false | On or off |
Result
{
"1": 28,
"2": "You",
"3": "Me",
"4": 43,
"5": {
"1": "abc123",
"2": {}
}
}Parameters
| Parameter | Default value | Input and choices |
|---|---|---|
| Schema (.proto text) | "" | Enter the .proto schema that defines message types and field names. |
| Show Unknown Fields | false | On or off |
| Show Types | false | On or off |
Before interpreting the result
Protocol parsers need the correct byte representation and framing. HTTP Request and DNS over HTTPS contact remote services only when you run them; browser network and CORS restrictions still apply.
How to use this page
- Paste your input or open a local file.
- Adjust tool options if needed, then choose Run tool.
- Copy the result or download the original output bytes.
Inputs and results are not added to the public catalogue or saved in the URL. Processing happens in your browser; HTTP Request and DNS over HTTPS send the requests you explicitly run. Files up to 128 MiB can be opened; decompression and image tools may have smaller processing limits. Large results have a shortened preview. Text and HTML downloads use UTF-8; binary downloads preserve output bytes. Pasted text follows browser newline handling; open a file when exact input bytes matter.