If you do not plan to reuse the belt, simply cut the belt in order to remove it. Cutting the belt is a much simpler and safer procedure.

A tensioned belt can cause severe injuries. Wear thick gloves if possible, and position your hands carefully to avoid pinching.

Place a rag behind the engine pulley to prevent the engine surface from being scuffed.

Wedge a long bolt or screwdriver shaft between the belt and the engine pulley.

Carefully feed the belt forward while using the shaft to derail the belt off the pulley.

Depending on how old the belt is, this may take significant force.