Lucee Documentation
Welcome to the Official Lucee Server Documentation
Lucee is a high performance, open source, ColdFusion / CFML server engine, written in Java.
The documentation here aims to provide a thorough reference and guide to all things to do with the Lucee Server. This includes reference material on both Functions and Tags as well as more in-depth articles in the Guides and tutorials section.
Our documentation is an open source and community driven effort. It is also a constant work in progress and we always welcome feedback, improvements and suggestions.
If you're interested in contributing to Lucee as a Developer, checkout our Git Repo
Lucee 7.0
Lucee 7 is our latest release, switching to only Single mode and Jakarta.
Breaking Changes between Lucee 6.2 and 7.0
Recipes - Lucee Guides and Tutorials
We are always adding and updating our detailed Lucee Recipes showing you how to take advantage of the wide range of features in Lucee.
Feel free to request new topics or ask questions via the dev forum.
Latest Content
- Lucee Versions and Extensions 09-Mar-26
- javax vs jakarta Servlet Compatibility 23-Feb-26
- External Agent 20-Feb-26
- Warmup 20-Feb-26
- Setting the Lucee Admin Password 22-Jan-26
- Servlet Configuration 16-Jan-26
- Structures and variables, preserving the original case 16-Jan-26
- Lucee Extension Utilities 09-Jan-26
- Java Classes Using Lucee's Logging 25-Dec-25
- Selective Cache Invalidation 18-Dec-25
- Lucee MSSQL Modern Mode 10-Dec-25
- Database Connection Management in Lucee 02-Dec-25
- DynamoDB Cache Extension 19-Nov-25
- Lucee Release Cycle 31-Oct-25
- Creating Heap Dumps in Lucee 27-Oct-25
- Dynamic Proxy Enhancements 10-Oct-25
- SQL Types 10-Oct-25
- Custom Tag Mappings 10-Oct-25
- Scheduled Tasks - efficiently updating in a single operation 27-Aug-25
- Hooks and Monitors 26-Aug-25
- REST Services with Lucee 23-Aug-25
To see what's new in Tags and Functions refer to Lucee Changelog, new Tags & Functions, Arguments and Attributes
Deploying Lucee
Deploying Lucee - How to configure and deploy Lucee
Locking Down Lucee - Security best practices for Lucee
Configuration - CFConfig.json - All about Lucee's configuration file
Recommended Settings - Recommended Settings
Lucee 6.2
Lucee 6.2 is our latest stable release, with enhanced Java and Maven integration, Jakarta Servlet support and better runtime performance.
Lucee 6.2 up to 50% faster than Lucee 5.4, while using less memory.
Our Official Docker images and Installers for 6.2 all bundle Tomcat 10.1 and Java 21. This may cause issues with the switch to the Jakarta namespace, Lucee 6.2 supports both, but anything which integrates with Tomcat (i.e. urlrewrite) will need updating, see the Jakarta issues in our bug tracker.
Breaking Changes between Lucee 6.1 and 6.2
Lucee 6.1
Targeting better performance and reduced memory usage, Lucee 6.1 introduces full support for Java 17 and 21, as well as Java 11. Java 8 is no longer officially supported.
Breaking Changes Between Lucee 6.0 and 6.1
Lucee 6.0
Highlights include, reduced size, faster startup, single context mode, JSON based configuration and much more.
As a Major Release, Lucee 6 does include some potential BREAKING CHANGES, for a range of security reasons and better compatibility with Adobe ColdFusion.
Breaking Changes between Lucee 5.4 and 6.0
Lucee 5.4 (LTS)
Lucee 5.4 is our LTS stable release and is recommended for production systems. More details are available in the Lucee 5 section of these docs.
Only Java 8 and 11 are supported, there are various changes in Java 21 including date time handling which are not addressed in 5.4, time to upgrade!
As a LTS release, Lucee 5.4 will receive security updates and critical regression fixes until December 31st 2025, but is no longer actively maintained.
Getting help
- Our mailing list / forum is over at https://dev.lucee.org/
- Lucee Support - How to report bugs/problems and get help
- Troubleshooting Lucee Server problems
Lucee 5.3
Lucee 5.3 (and older) now is no longer actively developed. It's time to upgrade to 5.4 LTS or 6 (recommended)
Lucee 4.5
Lucee 4.5 is the legacy stable release of the Lucee platform. It is End of Life (EOL) and no longer supported.
Java API Docs
The Java API documentation of Lucee Server's loader interfaces, are published at https://www.javadoc.io/doc/org.lucee/lucee/latest/index.html.
Lucee on YouTube
We also have a channel on YouTube where you can find further tutorials and tips: Lucee YouTube Channel