jidgen is a Java-based id generator that can be used as a command line program or as a library. The idea is to make automated generation of user IDs as easy as possible by introducing a simple, straightforward template language to describe the structure of the desired IDs. jidgen uses 100% Java and is thus platform independent. Itsupports collision filters for different backends to ensure the generated ID is unique in your environment. Blacklists are available to make sure all IDs are socially acceptable. As a command line program, it can easily be accessed by scripts or directly by the user. As an embedded library, it can easily be employed in the process of automated ID generation and suggestion.