Javalin

Javalin

Javalin is a lightweight, fast web framework for Java and Kotlin focused on simplicity and Java/Kotlin interoperability. It's designed for building REST APIs and web applications with a minimal amount of boilerplate code.
Development Web Frameworks
Javalin image
java kotlin rest-api web-application
Javalin alternatives ➤

Javalin: Lightweight Fast Web Framework for Java & Kotlin

Javalin is a lightweight, fast web framework for Java and Kotlin focused on simplicity and Java/Kotlin interoperability. It's designed for building REST APIs and web applications with a minimal amount of boilerplate code.

What is Javalin?

Javalin is a lightweight, fast web framework for Java and Kotlin focused on simplicity and Java/Kotlin interoperability. Key features of Javalin include:

  • Minimal and fluent API for writing web applications and REST APIs
  • Support for Java 8 lambdas and Kotlin lambda syntax for route handlers
  • Embedded Jetty server with support for blocking and asynchronous code
  • Plugin system for adding additional functionality
  • Focus on HTTP and REST, without forcing decisions on serialization or ORM

Some of the advantages of Javalin over other Java web frameworks like Spring MVC and JAX-RS implementations include simpler APIs, lighter weight, and better Kotlin support out of the box. It avoids over-configuration and aims to let developers get started quickly. Performance is also a key goal of Javalin.

Javalin is well-suited for microservices, REST APIs, web applications, and server-side rendered apps. Due to its embedded server and focused scope, it works very well for handling HTTP logic and leaving serialization, db access, dependency injection etc to other libraries in your stack.

Javalin Features

Features

  1. Lightweight and fast
  2. Minimal boilerplate code
  3. Built for Java and Kotlin
  4. Focused on REST APIs and web apps
  5. Simple routing and request handling
  6. Plugin system for extensibility
  7. Async request handling support
  8. Supports WebSockets

Pricing

  • Open Source

Pros

Very easy to get started

High performance

Interoperability with Java and Kotlin

Active community and development

Lightweight without unnecessary bloat

Cons

Limited documentation

Less features than larger frameworks

Not as mature as Spring or Play

Basic templating support

Official Links

Official Website
https://javalin.io/

The Best Javalin Alternatives

Top Development and Web Frameworks and other similar apps like Javalin

Here are some alternatives to Javalin:

Flask icon
Flask
Sinatra icon
Sinatra
Suggest an alternative ❐

Flask icon

Flask

Flask is a lightweight Python web framework that provides useful tools and features for building web applications. Here is an overview of Flask:It is based on the Werkzeug WSGI toolkit and Jinja2 template engine.Flask has a small and easy-to-extend core but supports many extensions that add advanced functionality as needed.It...
Flask image
Sinatra icon

Sinatra

Sinatra is an open source web application library and domain-specific language written in the Ruby programming language. It is designed to enable quick and easy creation of small web applications and APIs.Some key features and characteristics of Sinatra:Light-weight and minimal - Sinatra has very few dependencies and a simple, intuitive...
Sinatra image