# Why We Wrote a New JWT Library for Kotlin Multiplatform

DevFeed: [Why We Wrote a New JWT Library for Kotlin Multiplatform](<https://devfeed.tech/articles/why-have-we-written-a-new-jwt-library-gustavo-fao-valvassori-38237.md>)

Original publisher: [Read original article](<https://touchlab.co/kjwt-intro>)

Published: 2026-08-07T00:00:00Z

Content type: article

Language: en

Sources: [Touchlab | Enterprise Mobile Innovation & Development](<https://devfeed.tech/sources/touchlab-enterprise-mobile-innovation-development.md>)

Topics: [JSON Web Tokens](<https://devfeed.tech/topics/jwt.md>), [Kotlin Multiplatform](<https://devfeed.tech/topics/kotlin-multiplatform.md>), [Cryptography](<https://devfeed.tech/topics/cryptography.md>), [Authentication](<https://devfeed.tech/topics/authentication.md>), [Authorization](<https://devfeed.tech/topics/authorization.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>), [Library](<https://devfeed.tech/topics/library.md>)

Tags: [authentication](<https://devfeed.tech/tags/authentication.md>), [authorization](<https://devfeed.tech/tags/authorization.md>), [community](<https://devfeed.tech/tags/community.md>), [cryptography](<https://devfeed.tech/tags/cryptography.md>), [jwt](<https://devfeed.tech/tags/jwt.md>), [kmp](<https://devfeed.tech/tags/kmp.md>), [kotlin](<https://devfeed.tech/tags/kotlin.md>), [kotlin-multiplatform](<https://devfeed.tech/tags/kotlin-multiplatform.md>), [libraries](<https://devfeed.tech/tags/libraries.md>), [library](<https://devfeed.tech/tags/library.md>), [open-source](<https://devfeed.tech/tags/open-source.md>)

## AI overview

The author explains how a security-focused Kotlin Multiplatform banking project led to research into cryptography and JWTs. After finding that JJWT was limited for cross-platform projects, they began developing a new JWT library as a personal open-source learning project.

## Source excerpt

Earlier this year, we silently started working on and published a new KMP library. The reason it exists serves as a good lesson on how to start contributing to the open-source community.