Javalin is a very lightweight web framework for Kotlin and Java which supports WebSockets, HTTP2 and async requests. Javalin’s main goals are simplicity, a great developer experience, and first class interoperability between Kotlin and Java.

Javalin is more of a library than a framework. Some key points:

• You don't need to extend anything
• There are no @Annotations
• There is no reflection
• There is no other magic; just code.

General information:

• ❤️ Sponsor Javalin
• The project webpage is javalin.io (repo for webpage is at github.com/javalin/javalin.github.io).
• Documentation: javalin.io/documentation
• Chat on Discord: https://discord.gg/sgak4e5NKv
• Chat on Slack: https://join.slack.com/t/javalin-io/shared_invite/zt-1hwdevskx-ftMobDhGxhW0I268B7Ub~w
• Contributions are very welcome: CONTRIBUTING.md
• License summary: https://tldrlegal.com/license/apache-license-2.0-(apache-2.0)
• Interesting issues: /javalin/javalin/issues?q=label:INFO