Open-source library

PWT (Protobuf Web Token)

PWT (Protobuf Web Token) stores JWT-style claims in Protocol Buffers while keeping the familiar jwt.Claims API. It uses the signing algorithms from github.com/golang-jwt/jwt/v5, yields smaller tokens, and parses faster thanks to protobuf serialization. Custom data lives in a protobuf Struct on TokenBody.Payload.

GitHub repos

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Go package docs

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Last updated Jan 20, 2026

Highlights

Drop-in compatible with jwt.Claims for validation.
Smaller tokens and faster parsing vs standard JWT.
Custom claims live in TokenBody.Payload as a protobuf Struct.
Benchmarked at ~2.13x faster parsing with fewer allocations.

Tech stack

Go Protocol Buffers JWT

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