Protobuf to GraphQL Schema Converter
Convert Protocol Buffers messages, enums, and gRPC services into standardized GraphQL SDL in your browser.
At a glance
Protobuf to GraphQL Schema Converter transforms Protocol Buffers (.proto) messages, enums, and gRPC services into valid GraphQL SDL schemas. It maps messages to object types, repeated fields to arrays, enums to GraphQL enums, and RPC methods to Query and Mutation operations in browser memory.
100% Client-Side In-Browser Protobuf to GraphQL Transpiler
Compile Protocol Buffers (Proto2 and Proto3) messages, enums, maps, and gRPC services directly into GraphQL SDL Queries, Mutations, Types, and Inputs with zero server uploads.
Why Use This Protobuf to GraphQL Schema Converter?
How to Use Protobuf to GraphQL Schema Converter
Paste Protobuf Definition
Paste your .proto schema or choose one of our pre-built service presets.
Configure Schema Generation
Toggle gRPC service transpilation and select your preferred code indentation.
Copy or Export GraphQL SDL
Instantly copy the generated GraphQL SDL or download it as a .graphql schema file.
Protobuf to GraphQL Schema Conversion example
Demonstrates converting a Proto3 message with scalar and repeated fields, plus a gRPC query service into GraphQL SDL.
syntax = "proto3";
message User {
string id = 1;
string name = 2;
repeated string roles = 3;
}
service UserService {
rpc GetUser(User) returns (User);
}
type Query {
getUser(input: User): User
}
schema {
query: Query
}
type User {
id: String
name: String
roles: [String]
}
Technical Specifications & Engine Details
| Specification | Details |
|---|---|
| Supported Formats | Text / Input → Rendered Result |
| Execution Mode | 100% Client-Side In-Browser (client) |
| Browser Requirements | Requires modern web browser with ECMAScript 6+ and standard DOM Web APIs. |
| Performance Constraints | Client browser memory limit (typically 1–2 GB RAM); processing speed depends on client hardware. |
100% Client-Side Privacy Guarantee
Your schema files remain strictly on your local device. Zero data is transmitted to external servers.
Frequently Asked Questions
How are Protobuf RPC methods mapped to GraphQL?
How are Proto repeated fields and maps represented in GraphQL?
Does this tool support both Proto2 and Proto3?
Are my protobuf schemas uploaded to any server?
Methodology
This tool runs entirely in your browser. The example above shows a representative input and the result it produces.
Last updated .