OpenCms - Professional Content Management

Easy to Use, Open Source, Reliable

OpenCms from Alkacon Software is an enterprise-ready open source web content management system (CMS) based on Java and XML. OpenCms is platform independent - Runs on: Windows, Linux, Unix, Solaris, Mac OS. OpenCms supports all top databases: MySQL, Oracle, PostgreSQL, MS SQL. OpenCms works with the most popular Application Servers: Tomcat, JBoss, BEA, Websphere, Glassfish and Resin Professional. OpenCms has a browser based GUI, compatible with all top browsers: Internet Explorer, Mozilla Firefox, Chrome, Safari, Opera. Download OpenCms, the open source enterprise level website content management system, for free.

OpenCms from is a professional, easy to use website content management system. OpenCms helps content managers worldwide to create and maintain beautiful websites fast and efficiently.

The fully browser based user interface features configurable editors for structured content with well defined fields. Alternatively, content can be created using an integrated WYSIWYG editor similar to well known office applications. A sophisticated template engine enforces a site-wide corporate layout and W3C standard compliance for all content.

OpenCms is based on Java and XML technology. It can be deployed in an open source environment (e.g. Linux, Apache, Tomcat, MySQL) as well as on commercial components (e.g.  Windows NT, IIS, BEA Weblogic, Oracle).

As true open source software, OpenCms is free of licensing costs.

OpenCms Headlines

  • OpenCms 9.5.3 ready for download

    Alkacon OpenCms 9.5.3 OpenCms 9.5.3 is a maintenance update for 9.5 installations. It fixes several issues that persisted in previous releases. This version focuses on security and stability, also adding a limited number of new features. more...
  • OpenCms 10 Alpha 2 available

    OpenCms 10 Alpha 2 Development on OpenCms 10 makes good progress. Download OpenCms 10 Alpha 2 to get an advance look of the the next OpenCms generations great new user interface. more...
  • OpenCms Days 2016 - Save the date!

    OpenCms Days 2016 - Save the date! OpenCms Days 2016 will take place from September 26 to 27 in Cologne, Germany. Save the date now and get your early bird tickets February next year! more...
  • New OpenCms documentation and demo sites

    The updated OpenCms live demo website We have launched a new OpenCms documentation site and updated the demo site for OpenCms 9.5. The new OpenCms Documentation Central connects all relevant sources of information about OpenCms. more...

Download OpenCms 10 Alpha 2

  • Try OpenCms 10 Alpha 2! This alpha release provides you with an impression of the features of the next OpenCms generation.
    Size:143200KB

    Click here to download

Download OpenCms 9.5.3

  • OpenCms 9.5.3 fixes several issues that persisted in previous releases. This version focuses on security and stability, also adding a limited number of new features.
    Size:137187KB

    Click here to download

Upgrade OpenCms

  • Update your existing OpenCms installation to the current stable version 9.5.3 with the easy to use upgrade wizard.
    Size:115939KB

    Click here to download

Latest News

  • OpenCms 9.5.3 ready for download

    Jan 13, 2016 - OpenCms 9.5.3 is a maintenance update for 9.5 installations. It fixes several issues that persisted in previous releases. This version focuses on security and stability, also adding a limited number of new features.

  • OpenCms 9.5.3 Release Notes

    Jan 13, 2016 - The OpenCms 9.5.3 release notes contain detailed information about the updates, fixes and security improvements in this maintenance update.

  • OpenCms 10 Alpha 2 available

    Dec 9, 2015 - Development on OpenCms 10 makes good progress. Download OpenCms 10 Alpha 2 to get an advance look of the the next OpenCms generations great new user interface.

  • OpenCms 10 Alpha 2 Release Notes

    Dec 9, 2015 - The OpenCms 10 Alpha 2 release notes contain detailed information about the new features and fixes in this alpha version.

Try the OpenCms Live Demo

Alkacon OCEE

  • Alkacon Software - The OpenCms Experts

    The Alkacon OpenCms Enterprise Extensions (also called OCEE) are a commercial extension for OpenCms. Alkacon OCEE adds features to OpenCms that are often required for running OpenCms in a medium or large Enterprise, where data consistency, security and failover are highly important.

    Learn more...