By default, all software supports multiple file extensions. Garmin Connect supports at least 2 different file extensions. The basic files that Garmin Connect supports are .TCX. However, not all of the extensions listed on the list are always used to save the effects of work in Garmin Connect. Very often, files with such extensions are used as source data files used by Garmin Connect.
Garmin Connect can be used to convert file formats between the file extensions listed below. You can open a file with one of the file extensions below via Garmin Connect and try to save it in another file format, also supported by Garmin Connect.