Mkgmapgui is a GUI front end to mkgmap, a command-line utility for converting OpenStreetMap map files to files that can be uploaded to a Garmin GPS device.

While not all the advanced features of mkgmap are implemented in mkgmapgui, the most used are. mkgmapgui implements the following features:

* Converting an .osm file into a Garmin .img file * Combining multiple .img files into one .img file.