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 12 available

    OpenCms 12.0 OpenCms 12 features a headless JSON API for REST content access, together with several JavaScript demo applications that show how to use it. The default "Mercury" template has been greatly improved. Template variants allow to completely switch the generated HTML of a website simply by configuration. The updated WebDAV implementation enables mounting the OpenCms virtual file system from any WebDAV client. more...
  • Alkacon OCEE 12.0

    Alkacon OpenCms Enterprise Extensions / OCEE Alkacon OCEE 12.0 is the latest OCEE release for OpenCms 12. It adds new functions for managing log files in an OpenCms cluster, as well as improvements for the accelerator and the user synchronization. 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 12. The OpenCms Documentation Central connects all relevant sources of information about OpenCms. more...

Download OpenCms 12.0

  • OpenCms 12 features a headless JSON API for REST content access, together with several JavaScript demo applications that show how to use it. The default "Mercury" template has been greatly improved. Template variants allow to completely switch the generated HTML of a website simply by configuration. The updated WebDAV implementation enables mounting the OpenCms virtual file system from any WebDAV client.
    Size:233847KB

    Click here to download

Upgrade to OpenCms 12.0

  • Update your existing OpenCms installation to the current stable version 12.0 with the easy to use upgrade wizard.
    Size:233123KB

    Click here to download

Latest News

  • OpenCms 12 available

    Oct 12, 2021 - OpenCms 12 features a headless JSON API for REST content access, together with several JavaScript demo applications that show how to use it. The default "Mercury" template has been greatly improved. Template variants allow to completely switch the generated HTML of a website simply by configuration. The updated WebDAV implementation enables mounting the OpenCms virtual file system from any WebDAV client.

  • OpenCms 12 Release Notes

    Oct 12, 2021 - The OpenCms 12 release notes contain detailed information about the new features and fixes in this version.

  • Alkacon OCEE 12.0

    Oct 12, 2021 - Alkacon OCEE 12.0 is the latest OCEE release for OpenCms 12. It adds new functions for managing log files in an OpenCms cluster, as well as improvements for the accelerator and the user synchronization.

  • OpenCms Docker image

    Oct 12, 2021 - 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.

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