The .tcx file extension is used for a proprietary database data file format that was developed by Garmin Ltd. Also known as Garmin XML database files, these TCX files are generated by the Garmin Training Center software, which was also created by Garmin Ltd. This is a Windows and Mac OS X program that allows users to log their fitness and exercise activities for more convenient tracking purposes.These TCX files are XML formatted data files that are used to export and import fitness and exercise logs between Garmin Training Center programs in different computers and Garmin devices. There are two versions of the TCX file format, namely TCX1 and TCX2. Recent versions of the Garmin Training Center software have support for both TCX file format versions.These .tcx files can only be used through the Garmin Training Center program. It's best to leave these TCX files alone, in order for Garmin Training Center and other associated Garmin devices to continue working properly.
Try a universal file viewer
File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.
If you have additional information about the TCX file format or software that uses files with the TCX suffix, please do get in touch - we would love hearing from you.