VeloViewer has always been able to show you comprehensive views of your past rides and runs but plenty of people had asked to see similar views of routes they are planning to do. Fortunately Strava have just opened up their Routing API so now Veloviewer can display all the routes you have created and allow you to see their full details including the interactive 3D profiles.
Head there NOW …
Here is one example ….
really helps visualize routes and see potential problems (gradients)