Audience

Developers searching for a simple web framework solution for Java and Kotlin

About Javalin

You never extend classes and you rarely implement interfaces. Javalin is just a few thousand lines of code on top of Jetty, and its performance is equivalent to raw Jetty code. Due to its size, it's very easy to reason about the source code. Other Java and Kotlin web frameworks usually offer one version for each language. Javalin is being made with inter-operability in mind, apps are built the same way in both Java and Kotlin. Javalin runs on top of Jetty, one of the most used and stable web servers on the JVM. You can configure the Jetty server fully, including SSL and HTTP3 and everything else that Jetty offers. Many lightweight Java and Kotlin web frameworks don't support OpenAPI, but Javalin does.

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Integrations

API:
Yes, Javalin offers API access
See Integrations

Ratings/Reviews - 1 User Review

Overall 5.0 / 5
ease 4.0 / 5
features 5.0 / 5
design 5.0 / 5
support 5.0 / 5
More Reviews Write a Review

Company Information

Javalin
javalin.io

Videos and Screen Captures

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Product Details

Platforms Supported
Cloud
Training
Documentation
Support
Online

Javalin Frequently Asked Questions

Q: What kinds of users and organization types does Javalin work with?
Q: What languages does Javalin support in their product?
Q: What kind of support options does Javalin offer?
Q: What other applications or services does Javalin integrate with?
Q: Does Javalin have an API?
Q: What type of training does Javalin provide?

Javalin Product Features

Javalin Verified User Reviews

Write a Review
  • A Javalin User
    Developer
    Used the software for: 2+ Years
    Frequency of Use: Weekly
    User Role: User
    Company Size: 1 - 25
    Design
    Ease
    Features
    Support
    Probability You Would Recommend?
    1 2 3 4 5 6 7 8 9 10

    "Java friendly"

    Posted 2025-11-04

    Pros: Good for java developer who want to create there own project but do not want to integrate spring boot. It is fast and modern which is extremely fast.

    Cons: It may require some good knowledge of java before using it. you would doing many manual configurations most of the time but atleast not in 'XML'.

    Overall: Overall it is very fast in speed compare to 'FASTAPI' because it is in java.
    I can proudly say that people who want to create a 'APIS' in java but do not want to be a part of 'SPRING' than this is for them.

    Read More...
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