Unfortunately there are currently no webcams displaying images from downtown Jasper. The best option out there is the live feed from Jasper Skytram (which only operates in summer, but the webcam updates year-round)
Pursuit operates a Maligne Lake webcam that shows the scene from the day lodge overlooking the lake. Although the day lodge and boat tours only operate in summer, the webcam is active year-round.
The four webcams at Marmot Basin Ski Resort operate year-round, giving you a good idea of current weather conditions.
The Alberta Motor Association has the province’s highway covered, including a webcam that is mounted along Highway 16 near the Jasper National Park East Gate.
There are no webcams showing the actual Icefields Parkway, but the tour company Pursuit has webcams set up at their two attractions along the highway. Both are taken out of service during the winter.