TypeScript to Protobuf (Proto3) Converter
Convert TypeScript interfaces and type definitions into Protocol Buffers version 3 message schemas in your browser.
At a glance
TypeScript to Protobuf Converter translates TypeScript interfaces and type aliases into Protocol Buffers Proto3 message definitions. It assigns sequential field tags starting at 1, maps string, number, and boolean primitives, converts arrays into repeated fields, translates literal unions to enums, and exports valid .proto files client-side.
100% Client-Side In-Browser TypeScript to Protobuf (Proto3) Converter
Compile TypeScript interfaces and types into Protocol Buffers Proto3 messages, sequential tag indices, enums, and optional/repeated fields in browser memory. Zero network requests or cloud uploads.
Sequential Field Tags
Protobuf uses integer tags for compact binary wire serialization. Field numbers start at 1 and increment sequentially across all message fields.
Enums with Zero Index
In Proto3, every enum must have a zero-indexed default entry (e.g. STATUS_UNSPECIFIED = 0). String literal unions automatically generate compliant enum structures.
Client-Side Isolation
Your source code and generated schema files never leave your browser sandbox. The generator executes in local JavaScript memory with sub-millisecond latency.
Why Use This TypeScript to Protobuf (Proto3) Converter?
How to Use TypeScript to Protobuf (Proto3) Converter
Paste TypeScript Definitions
Enter or paste your TypeScript interfaces, type aliases, or enums into the editor.
Configure Proto3 Options
Specify an optional package name, select your preferred integer type (int32 or int64), and toggle Date mapping.
Copy or Download .proto File
Copy the generated Proto3 schema directly or download it as a .proto file ready for protoc or gRPC services.
TypeScript Interface to Proto3 Message
Demonstrates converting a TypeScript interface with primitives, arrays, and optional properties into a Protocol Buffers Proto3 message definition.
interface UserAccount {
id: string;
username: string;
isActive: boolean;
tags: string[];
bio?: string;
}
syntax = "proto3";
message UserAccount {
string id = 1;
string username = 2;
bool is_active = 3;
repeated string tags = 4;
optional string bio = 5;
}
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Formats | TEXT → TEXT |
| Execution Mode | 100% Client-Side In-Browser (client) |
| Browser Requirements | Modern browser with JavaScript enabled. |
| Performance Constraints | Zero external dependencies. Runs 100% client-side in browser memory. |
100% Client-Side Privacy Guarantee
Your files and data remain strictly on your local device. Computations run locally using browser memory with zero network uploads.
Frequently Asked Questions
How are TypeScript numbers mapped to Protobuf numeric types?
How are optional fields handled in Proto3?
How does the tool handle TypeScript Date properties?
Is my TypeScript code sent to any external server?
Methodology
This tool runs entirely in your browser. The example above shows a representative input and the result it produces.
Last updated .