Javalin Description

Classes are seldom extended and interfaces are infrequently implemented in Javalin. This framework is built upon Jetty and consists of only a few thousand lines of code, allowing it to match the performance of Jetty's native implementation. Its compact size makes understanding the source code straightforward. Unlike many other Java and Kotlin web frameworks, which typically provide separate versions for each programming language, Javalin has been designed with interoperability in mind, ensuring that applications can be developed similarly in both Java and Kotlin. Running on Jetty, one of the most widely used and reliable web servers available for the JVM, Javalin allows comprehensive configuration of the Jetty server, including support for SSL, HTTP/3, and all the features Jetty provides. While many lightweight web frameworks in Java and Kotlin lack OpenAPI support, Javalin includes this functionality, making it a more versatile option for developers. Consequently, Javalin stands out as a robust choice for building modern web applications efficiently.

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Integrations

API:
Yes, Javalin has an API
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Reviews - 1 Verified Review

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features
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support
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Company Details

Company:
Javalin
Website:
javalin.io

Media

Javalin Screenshot 1
Javalin Screenshot 1 Javalin Screenshot 2
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Product Details

Platforms
Web-Based
Types of Training
Training Docs
Customer Support
Online Support

Javalin Features and Options

Javalin User Reviews

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  • Name: Anonymous (Verified)
    Job Title: Developer
    Length of product use: 2+ Years
    Used How Often?: Weekly
    Role: User
    Organization Size: 1 - 25
    Features
    Design
    Ease
    Support
    Likelihood to Recommend to Others
    1 2 3 4 5 6 7 8 9 10

    Java friendly

    Date: Nov 04 2025

    Summary: 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.

    Positive: 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.

    Negative: 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'.

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