Better than JSON

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Protocol Buffers (Protobuf) offers significant advantages over JSON for API development through strong typing, binary serialization, and automatic code generation. While JSON remains popular for its human readability and flexibility, Protobuf provides 3x smaller payload sizes, type safety across multiple languages, and eliminates manual validation errors. The article demonstrates practical implementation using Dart and the Shelf framework, showing how Protobuf can be used independently of gRPC in traditional HTTP APIs. The main trade-off is reduced human readability of binary data, requiring schema files and specialized tooling for debugging.

#webdev

#backend

#dart

Dec 02, 2025•8m read time•From aloisdeniel.com

Table of contents

Serialization Why is JSON so common?Protobuf: ever heard of it?Proto — Strong typing and modern tooling Buffer — Ultra-efficient binary serialization Example: a tiny Dart server using Shelf that returns Protobuf However… JSON still keeps one important advantage Conclusion