If you have a route planned and push the Download button, several file format are available for download to your device.
ITN - TomTom itinerary file, which can be loaded on some TomTom GPS devices (old models).
GPX - GPX Exchange Format, which can be loaded on several other GPS models, like Garmin. This file only holds the destinations, no route.
GPS - Same as GPX but with with all route waypoints.
KML - Keyhole Markup Langauge file, that can be used for geographic applications, like Google Earth
CSV - Comma seperated file that can be used for several office applications. Recommended for use with Excel
TXT - Flat file that only holds your destinations as text
Next to downloading files, you can export routes directly using links to Google Maps and Graphhoppper.