Protobuf Formatter
Free online Protobuf formatter, no installation required. Beautify .proto definition files
What is Protocol Buffers?
Protocol Buffers (protobuf) is Google's language-neutral, platform-neutral extensible mechanism for serializing structured data. It's like JSON but smaller, faster, and generates native code for data access. Protobuf is used extensively in microservices, gRPC, and high-performance data interchange.
How to Use This Protobuf Formatter
Paste your .proto file content in the editor. The tool validates syntax and applies consistent formatting including proper indentation, field alignment, and spacing. It checks for common errors and highlights any issues.
▶What does the formatter check?
The formatter validates proto3 syntax, checks field numbers are unique, ensures required imports are present, and verifies message, enum, and service definitions are correct.
▶Does this support proto2 syntax?
This tool primarily supports proto3 syntax, which is the recommended version. Some proto2 features may not be fully validated.
▶Should I use this instead of protoc?
No. Use protoc (the Protocol Buffers compiler) for production validation and code generation. This tool is for quick formatting checks during development.
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