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 18 available

    OpenCms 18 OpenCms 18 adds a new "Place element" mode in the page editor that allows precise element placement as an alternative to drag & drop. Reused content is now clearly marked. Automatic typographical correction of quotation marks has been added to all of the editors. “Dead links” in content that is entered in a WYSIWYG editor are now automatically disabled. Our Mercury template includes several new features, such as setting different image formats for mobile and desktop and many more. more...
  • Alkacon OCEE 18

    Alkacon OpenCms Enterprise Extensions / OCEE Alkacon OCEE 18 is the latest OCEE release for OpenCms 18. This version features a license key mechanism that allows to share the license key on several servers in a cloud installation. more...
  • Documentation website for the Mercury template

    Mercury Documentation (Photo by Jean-Philippe Delberghe on Unsplash) The Mercury template from Alkacon Software is a comprehensive, modular template based on Bootstrap 5 for OpenCms. This feature-rich template now has a complete and exhaustive documentation website. 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...

Download OpenCms 18

  • OpenCms 18 adds a new "Place element" mode in the page editor that allows precise element placement as an alternative to drag & drop. Reused content is now clearly marked. Automatic typographical correction of quotation marks has been added to all of the editors. “Dead links” in content that is entered in a WYSIWYG editor are now automatically disabled. Our Mercury template includes several new features, such as setting different image formats for mobile and desktop and many more.
    Size:249633KB

    Click here to download

Upgrade to OpenCms 18

  • Update your existing OpenCms installation to the current stable version 18 with the easy to use upgrade wizard.
    Size:206043KB

    Click here to download

Latest News

  • OpenCms 18 available

    Oct 8, 2024 - OpenCms 18 adds a new "Place element" mode in the page editor that allows precise element placement as an alternative to drag & drop. Reused content is now clearly marked. Automatic typographical correction of quotation marks has been added to all of the editors. “Dead links” in content that is entered in a WYSIWYG editor are now automatically disabled. Our Mercury template includes several new features, such as setting different image formats for mobile and desktop and many more.

  • OpenCms 18 Release Notes

    Oct 8, 2024 - The OpenCms 18 release notes contain detailed information about the new features and fixes in this version.

  • Alkacon OCEE 18

    Oct 8, 2024 - Alkacon OCEE 18 is the latest OCEE release for OpenCms 18. This version features a license key mechanism that allows to share the license key on several servers in a cloud installation.

  • Documentation website for the Mercury template

    Jul 8, 2024 - The Mercury template from Alkacon Software is a comprehensive, modular template based on Bootstrap 5 for OpenCms. This feature-rich template now has a complete and exhaustive documentation website.

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