Protobuf Formatter Online
Beautify or minify Protocol Buffer (.proto) files instantly in your browser.
What Is Protobuf Formatter?
Protobuf Formatter is a free online tool that cleans up and restructures Protocol Buffer (.proto) files. In Beautify mode it applies consistent indentation and line breaks so your .proto definitions are easy to read and maintain. In Minify mode it strips comments and collapses whitespace to produce a compact file.
How to Use Protobuf Formatter
- Choose Beautify to format with indentation, or Minify to compress.
- Paste your .proto file content into the input panel, or click Load Sample to try an example.
- The formatted output appears instantly in the right panel.
- Click Copy to copy the result to clipboard.
Features
- Beautify mode with 2-space or 4-space indentation
- Minify mode strips comments and collapses whitespace
- Supports proto2 and proto3 syntax
- Handles messages, services, enums, options, and imports
- Preserves nested message definitions
- Copy result to clipboard
- Runs entirely in your browser — zero data uploaded
FAQ
What is Protobuf Formatter?
Protobuf Formatter is a free online tool that formats Protocol Buffer (.proto) files. It can beautify .proto files with consistent indentation for readability, or minify them by removing comments and whitespace.
Does this support both proto2 and proto3?
Yes. This formatter supports both proto2 and proto3 syntax, including messages, services, enums, options, imports, and all standard Protobuf features.
Is my .proto file uploaded to a server?
No. All formatting happens entirely in your browser. Your Protocol Buffer definitions never leave your device.