What is an ITN file?
An .ITN file is a TomTom Navigator Itinerary File. It contains route points and navigation instructions for GPS devices. TomTom International developed this format to help users plan and save travel routes. Inside, the file usually stores plain text data formatted for TomTom Navigator software.
How to open ITN files?
Users typically transfer an .ITN file directly to a compatible TomTom GPS device or load it into TomTom MyDrive. Because the file stores plain text data, you can also open it with basic text editors like Notepad on Windows or TextEdit on macOS. Other routing software, such as RouteConverter, can read and convert these files into standard GPS formats like .GPX.
Inspecting ITN files online
viewer.online/itn can analyze .ITN files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available. Because file extensions can sometimes have multiple meanings, viewer.online/itn will help you identify the actual format of your file.
Summary
viewer.online/itn is useful for identifying, inspecting, and understanding .ITN files without installing software or dealing with compatibility problems.