The Apache Tomcat® software is an open source implementation of the Jakarta Servlet, Jakarta Pages, Jakarta Expression Language and Jakarta WebSocket technologies. The Jakarta Servlet, Jakarta Pages, Jakarta Expression Language and Jakarta WebSocket specifications are developed as part of the Jakarta EE Platform.

The Apache Tomcat software is developed in an open and participatory environment and released under the Apache License version 2. The Apache Tomcat project is intended to be a collaboration of the best-of-breed developers from around the world. We invite you to participate in this open development project. To learn more about getting involved, click here or keep reading.

Apache Tomcat software powers numerous large-scale, mission-critical web applications across a diverse range of industries and organizations. Some of these users and their stories are listed on the PoweredBy wiki page.

Apache Tomcat, Tomcat, Apache, the Apache feather, and the Apache Tomcat project logo are trademarks of the Apache Software Foundation.

For every major Tomcat version there is one download page containing links to the latest binary and source code downloads, but also links for browsing the download directories and archives:

• Tomcat 11
• Tomcat 10
• Tomcat 9

To facilitate choosing the right major Tomcat version one, we have provided a version overview page.

The documentation available as of the date of this release is included in the docs webapp which ships with tomcat. You can access that webapp by starting tomcat and visiting http://localhost:8080/docs/ in your browser. The most up-to-date documentation for each version can be found at:

• Tomcat 11
• Tomcat 10
• Tomcat 9

Please see RUNNING.txt for more info.

Please see LICENSE for more info.

• Free community support is available through the tomcat-users email list and a dedicated IRC channel (#tomcat on Freenode).

• If you want freely available support for running Apache Tomcat, please see the resources page here.

• If you want to be informed about new code releases, bug fixes, security fixes, general news and information about Apache Tomcat, please subscribe to the tomcat-announce email list.

• If you have a concrete bug report for Apache Tomcat, please see the instructions for reporting a bug here.

Please see CONTRIBUTING for more info.