Protobuf to JSON Converter
Generate sample JSON from Protocol Buffer schema definitions with support for nested messages and enums.
Protobuf Input
JSON Output
2 messages
How to Use
- Paste your .proto schema or upload a .proto file.
- Configure output options (pretty print, camelCase, defaults).
- Copy or download the generated JSON.
Frequently Asked Questions
How does Protobuf to JSON conversion work?
The tool parses your .proto schema, identifies message definitions and their field types, then generates a sample JSON object with default values for each field.
Does it support enums?
Yes. Enum fields are populated with the first defined enum value as a string.
What about nested messages?
Nested message types are resolved and expanded into nested JSON objects. Repeated fields become JSON arrays.
Is this binary Protobuf decoding?
No. This tool converts .proto schema definitions to sample JSON. It generates example JSON that matches the schema structure, which is useful for API documentation, testing, and understanding data shapes.