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 16 available

    OpenCms 16 OpenCms 16 brings the new app "Unused contents" that allows to find and delete content that is not actively used on any container page. It is now possible to select between several individual detail pages in the same website based on categories of the detail content. It can now be enforced that all content managers must set a new password after the next login. The default Mercury template brings several new features, e.g. the "Image tile display" formatter for the "Tabs / accordion" element. more...
  • Alkacon OCEE 16

    Alkacon OpenCms Enterprise Extensions / OCEE Alkacon OCEE 16 is the latest OCEE release for OpenCms 16. This version fixes an issue where deleting a user/group didn't flush the ACL cache. more...
  • OpenCms Docker image

    OpenCms and Docker Test OpenCms using the official image from the Docker hub registry - the fastest way to evaluate and test OpenCms. The image is well suited for evaluation and test purposes of the latest OpenCms release. We provide a docker-compose file to get OpenCms and the database running with just one command. more...
  • OpenCms documentation and demo sites

    The updated OpenCms live demo website We have updated the OpenCms documentation site as well as the demo site for OpenCms 14. The OpenCms Documentation Central connects all relevant sources of information about OpenCms. more...

Download OpenCms 16

  • OpenCms 16 brings the new app "Unused contents" that allows to find and delete content that is not actively used on any container page. It is now possible to select between several individual detail pages in the same website based on categories of the detail content. It can now be enforced that all content managers must set a new password after the next login. The default Mercury template brings several new features, e.g. the "Image tile display" formatter for the "Tabs / accordion" element.
    Size:236456KB

    Click here to download

Upgrade to OpenCms 16

  • Update your existing OpenCms installation to the current stable version 16 with the easy to use upgrade wizard.
    Size:193142KB

    Click here to download

Latest News

  • OpenCms 16 available

    Oct 2, 2023 - OpenCms 16 brings the new app "Unused contents" that allows to find and delete content that is not actively used on any container page. It is now possible to select between several individual detail pages in the same website based on categories of the detail content. It can now be enforced that all content managers must set a new password after the next login. The default Mercury template brings several new features, e.g. the "Image tile display" formatter for the "Tabs / accordion" element.

  • OpenCms 16 Release Notes

    Oct 2, 2023 - The OpenCms 16 release notes contain detailed information about the new features and fixes in this version.

  • Alkacon OCEE 16

    Oct 2, 2023 - Alkacon OCEE 16 is the latest OCEE release for OpenCms 16. This version fixes an issue where deleting a user/group didn't flush the ACL cache.

  • OpenCms 15 available

    Apr 25, 2023 - OpenCms 15 provides role-based control to restrict who is allowed to update the sitemap configuration, including an editor for modifying selected sitemap attributes by any content manager. The new launchpad app "Person data search" reveals personal user data stored in the VFS. The Mercury template adds more than 1800 optional icons from the Bootstrap collection and numerous further enhancements.

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...

Try the OpenCms Live Demo