Excel to Protocol Buffers Converter

About the Excel to Protocol Buffers Converter

This free online Excel to Protocol Buffers converter generates clean proto3 schemas and sample data directly from your spreadsheets. Upload an Excel (.xlsx or .xls) file and get ready-to-use .proto definitions plus JSON sample records for your APIs, microservices, and data pipelines.

Key Features & Benefits

• Automatic schema generation: Infer field names and Protocol Buffers types (string, int, double, bool) from your Excel data.
• Clean proto3 output: Generates a message for your table and a wrapper message for sample data, ready to paste into your project.
• Header row support: Use the first row as column headers or auto-generate field names when no header is available.
• Sample data block: See example JSON data for the first few rows to validate that the Excel to Protobuf conversion is correct.
• One-click copy & download: Copy the .proto content to your clipboard or download it as a file for version control.
• Browser-based and free: No signup, no installation, and no file uploads to a server.

How to Convert Excel to Protocol Buffers

1. Upload your Excel file: Click the upload area or drag and drop an .xlsx or .xls file.
2. Confirm header settings: If your first row contains column names (ID, name, price, etc.), leave First row is header checked.
3. Review the generated schema: The tool creates a message based on your sheet name and columns, with appropriate Protobuf field types.
4. Check sample data: Scroll to the JSON sample section to verify that values from your Excel sheet are mapped correctly.
5. Copy or download: Use the Copy button to paste the schema into your project, or download a .proto file.

Example: Simple Excel to Protobuf Schema

Suppose your Excel sheet contains:

• ID
• Name
• Price
• InStock

The generated Protocol Buffers schema might look like:

syntax = "proto3";

message Products {
  string id = 1;
  string name = 2;
  double price = 3;
  bool in_stock = 4;
}

message ProductsData {
  repeated Products items = 1;
}

You can now use this .proto file with gRPC, microservices, or any Protocol Buffers compatible system.

When Should You Use Excel to Protocol Buffers?

• API design and prototyping: Start from a familiar Excel table, then generate a Protobuf schema to implement an API or data contract.
• Data migration: Move business data from Excel into systems that rely on binary Protobuf messages for performance and compact storage.
• Analytics and data modeling: Standardize your spreadsheet structure as a schema that can be reused across teams and services.
• Documentation: Keep your Excel definitions and .proto files in sync for better developer and stakeholder communication.

FAQ: Excel to Protocol Buffers

Is this Excel to Protobuf tool free?

Yes. The Excel to Protocol Buffers converter is completely free to use with no registration or usage limits.

What file types are supported?

You can upload .xlsx and .xls Excel files. Other formats like CSV should be converted to Excel first.

How are field types chosen?

The converter inspects sample values in each column and automatically chooses a suitable Protobuf type such as string, double, or bool. If a column mixes different data types, it defaults to string for safety.

Does my data leave the browser?

No. All Excel to Protobuf conversions happen locally in your browser using JavaScript. Your spreadsheet is not uploaded to any remote server.

Can I edit the generated .proto file?

Absolutely. The tool gives you a solid starting point, and you can adjust message names, field types, and comments to match your project conventions.