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WebSphere Liberty 21: The Next-Generation Application Runtime - Download Now


WebSphere Liberty 21 is a next-generation application server that accelerates the delivery of cloud-native applications, allowing your team to rapidly deliver differentiating innovation. Whether you're running microservices in a serverless environment or a traditional always-on application, WebSphere Liberty 21 requires less infrastructure, saving costs, and providing the flexibility your organization needs to deploy on any cloud in a trusted, secure, and open environment. WebSphere Liberty 21 empowers your development and platform engineering teams to continuously deliver code that meets and exceeds your customers' expectations.

download websphere liberty 21

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How to download WebSphere Liberty 21

There are two ways to download WebSphere Liberty 21: using archive packages or using installation manager packages. Archive packages are lightweight, easily customizable, and better suited for cloud deployments. Installation manager packages provide managed installations, allow for in-place updates, and are the same tool that is used to install many other IBM products.

To download archive packages, you can visit the website and select the archives with all features option. You can choose from different platforms such as Linux, Windows, AIX, Solaris, or z/OS. You can also download convenience ZIP files for Liberty Kernel or OSGi applications, or convenience ZIP files with Java EE 8 or Java EE 7.

To download installation manager packages, you can visit the website and select the installation manager option. You can choose from different platforms such as Linux, Windows, AIX, Solaris, or z/OS. You can also download local repository files for installation manager installation.

How to install WebSphere Liberty 21

Using installation manager

To install WebSphere Liberty 21 using installation manager, you need to have installation manager version 1.9 or later installed on your system. You also need to have an existing Liberty installation on any level from 8.5.5.x to onwards. You can use online product repositories or Passport Advantage Online for Network Deployment, Base, or Core.

The steps to install WebSphere Liberty 21 using installation manager are as follows:

  • Launch installation manager and click Install.

  • Select the package group that contains WebSphere Application Server - Base or Network Deployment.

  • Select the version of WebSphere Application Server - Base or Network Deployment that you want to install.

  • Select the additional features that you want to install, such as WebSphere Liberty 21, WebSphere Liberty 21 with Java EE 8, or WebSphere Liberty 21 with Java EE 7.

  • Review the summary and click Install.

  • Wait for the installation to complete and click Finish.

You can verify that WebSphere Liberty 21 is installed by running the version command from the bin directory of your Liberty installation. You should see something like this:

WebSphere Application Server (wlp-1.0.57.cl210120210119-1900) Java Platform Copyright IBM Corp. Java Runtime Environment Version: 1.8.0_281 Java Runtime Environment Vendor: IBM Corporation Product Edition: BASE

Using archive files

To install WebSphere Liberty 21 using archive files, you need to have a Java Development Kit (JDK) version 8 or later installed on your system. You also need to download the archive file that matches your platform and desired features from the Fix Central website.

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The steps to install WebSphere Liberty 21 using archive files are as follows:

  • Extract the archive file to a directory of your choice.

  • Set the JAVA_HOME environment variable to point to your JDK installation.

  • Run the server create command from the wlp/bin directory of your Liberty installation to create a default server.

  • Run the server start command from the same directory to start the default server.

  • Open a browser and go to to verify that WebSphere Liberty 21 is running.

You can also customize your server configuration by editing the server.xml file in the wlp/usr/servers/defaultServer directory of your Liberty installation. You can add or remove features, change ports, define applications, and more.

Benefits of WebSphere Liberty 21

Cloud-native capabilities

WebSphere Liberty 21 is designed to support cloud-native applications and microservices, which are modular, scalable, resilient, and agile. WebSphere Liberty 21 provides the following features and advantages for cloud-native development and deployment:

  • A lightweight and modular runtime that can run on any cloud platform, such as Kubernetes, OpenShift, IBM Cloud, AWS, Azure, or Google Cloud.

  • A flexible and dynamic configuration that can be updated without restarting the server or redeploying the application.

  • A zero-migration architecture that ensures compatibility across different versions of WebSphere Liberty 21 and eliminates the need for costly and risky migrations.

  • A comprehensive set of features that support modern development practices, such as DevOps, continuous delivery, test automation, observability, and security.

  • A fast startup time and low memory footprint that optimize resource utilization and performance.

Developer productivity

WebSphere Liberty 21 is designed to boost developer productivity and efficiency, allowing them to focus on creating innovative and high-quality applications. WebSphere Liberty 21 provides the following tools and support for developers:

  • A simple and intuitive command-line interface that enables easy creation, management, and testing of servers and applications.

  • A powerful and integrated development environment that supports popular tools such as Eclipse, Visual Studio Code, IntelliJ IDEA, Maven, Gradle, Ant, and more.

  • A live reload feature that automatically detects changes in source code or configuration and updates the running application without requiring a restart or redeploy.

  • A hot deployment feature that enables adding or removing features on demand without affecting the running application.

  • A rich set of APIs and frameworks that enable developers to create modern applications using technologies such as MicroProfile, Jakarta EE, Spring Boot, Node.js, Python, Ruby, PHP, and more.

Open standards and compatibility

WebSphere Liberty 21 is committed to supporting open standards and ensuring compatibility with other application servers and frameworks. WebSphere Liberty 21 provides the following benefits in terms of openness and compatibility:

  • A full compliance with Java EE 8 and Java EE 7 specifications, which guarantee interoperability with other Java EE application servers and frameworks.

  • A leading role in developing and implementing MicroProfile specifications, which define a set of APIs and features for building microservices using Java EE technologies.

  • A strong contribution to Jakarta EE specifications, which are the evolution of Java EE standards under the Eclipse Foundation.

  • A compatibility with other open source frameworks and libraries, such as Spring Boot, Quarkus, Helidon, Micronaut, and more.

  • A support for open source technologies and tools, such as Docker, Kubernetes, OpenShift, Prometheus, Grafana, Jaeger, Zipkin, and more.

Comparison of WebSphere Liberty 21 with other application servers

With traditional WebSphere Application Server

WebSphere Liberty 21 is a modern and lightweight


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