∞ do more, more easily

Jooby is a modular, high-performance web framework for Java and Kotlin. Designed for simplicity and speed, it gives you the freedom to build on your favorite server with a clean, modern API.

🚀 Built for Speed

• High Performance: Consistently ranks among the fastest Java frameworks in TechEmpower benchmarks.
• Lightweight Footprint: Low memory usage and fast startup times make it ideal for microservices environments.
• Choose Your Engine: Built to run on your favorite high-performance servers: Netty, Jetty, or Undertow.

🛠️ Developer Productivity

• Instant Hot-Reload: Save your code and see changes immediately without restarting the entire JVM.
• Modular by Design: Only use what you need. Jooby offers over 50 "thin" modules for database access (Hibernate, JDBI, Flyway), security (Pac4j), and more.
• OpenAPI & Swagger: Automatically generate interactive documentation for your APIs with built-in OpenAPI 3 support.

🧩 Unrivaled Flexibility

• The Power of Choice: Use the Script API (fluent, lambda-based routes) for simple apps, or the MVC API (annotation-based) for complex enterprise projects.
• Reactive & Non-Blocking: Full support for modern async patterns, including Kotlin Coroutines, RxJava, Reactor, and CompletableFutures.
• First-Class Kotlin Support: Native DSLs and features designed specifically to make Kotlin development feel intuitive and type-safe.

Quick Start

Java:

import static io.jooby.Jooby.runApp;

public class App {

  public static void main(final String[] args) {
    runApp(args, app -> {
      app.get("/", ctx -> "Welcome to Jooby!");
    });
  }
}

Kotlin:

import io.jooby.runApp

fun main(args: Array<String>) {
  runApp(args) {
    get ("/") {
      "Welcome to Jooby!"
    }
  }
}

documentation

Documentation is available at https://jooby.io

help

Discord

sponsors

Previous version

• v3: Documentation and source code
• v2: Documentation and source code
• v1: Documentation and source code

license

Apache License 2

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