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

  • Alkacon OCEE 4.5.2 for OpenCms 9.5.2 available

    Alkacon OpenCms Enterprise Extensions / OCEE OCEE 4.5.2 is required for OpenCms 9.5.2. Version 3.5.7 for OpenCms 8.x is also available. OCEE is a commercial OpenCms extension that offers support for LDAP, clustering, replication and accelerated page load times. more...
  • OpenCms Days 2015 - Conference and Expo

    OpenCms Days 2015 - September 28 to September 29, 2012 OpenCms Days 2015 will take place from Monday, September 28 to Tuesday, September 29, 2015 in Cologne, Germany. This year's OpenCms Days motto is "OpenCms 10 - X marks the spot". Be there to meet with leading OpenCms experts. Highlight will be the introduction of OpenCms 10. more...
  • OpenCms 9.5.2 available

    Alkacon and OpenCms logo Download OpenCms 9.5.2 now! It fixes a number of issues that persisted in the 9.5.1 release. This version also contains several security improvements against XSS attacks. 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

  • Update to OpenCms 9.5.2! This version brings template creation without the need to code, plus other features like user generated content, on-the-fly PDF generation, greatly improved documentation and much more - all presented in a responsive demo website based on Bootstrap.
    Size:136522KB

    Click here to download

Upgrade OpenCms

  • Update your existing OpenCms installation to version 9.5.2 with the easy to use upgrade wizard.
    Size:115271KB

    Click here to download

Try the OpenCms Live Demo

Latest News

  • Alkacon OCEE 4.5.2 for OpenCms 9.5.2 available

    Jul 7, 2015 - OCEE 4.5.2 is required for OpenCms 9.5.2. Version 3.5.7 for OpenCms 8.x is also available. OCEE is a commercial OpenCms extension that offers support for LDAP, clustering, replication and accelerated page load times.

  • OpenCms Days 2015 - Conference and Expo

    Jun 25, 2015 - OpenCms Days 2015 will take place from Monday, September 28 to Tuesday, September 29, 2015 in Cologne, Germany. This year's OpenCms Days motto is "OpenCms 10 - X marks the spot". Be there to meet with leading OpenCms experts. Highlight will be the introduction of OpenCms 10.

  • OpenCms 9.5.2 available

    Jun 24, 2015 - Download OpenCms 9.5.2 now! It fixes a number of issues that persisted in the 9.5.1 release. This version also contains several security improvements against XSS attacks.

  • OpenCms 9.5.2 Release Notes

    Jun 24, 2015 - The OpenCms 9.5.2 release notes contain detailed information about the fixes and security improvements in this maintenance update.

OpenCms Days 2015

  • OpenCms Days 2015 Conference and Expo

    OpenCms Days 2015 will take place Monday, September 28 to Tuesday, September 29 in Cologne, Germany.

    Highlight of the international user conference and expo will be the introduction of OpenCms 10. OpenCms Days will be the perfect opportunity to exchange experiences around OpenCms with high profile participants and speakers from all over the world.

    Visit this 2 day conference and expo to meet and mingle with leading OpenCms experts and other OpenCms users.

    OpenCms Days 2015 is targeted towards an international audience. The language spoken at the event and used for all presentations is English.

    More information...

OpenCms Days 2015

  • Gold Sponsors

    Alkacon Software - The OpenCms Experts

    OpenCms(オープンソースCMS)・クロールなどの企画・開発・運用・サポートならユビキャスト