If you have a bench vice here's a trick:
Get the crank pointing down and and grip the crank into the vise (with the bike standing up). Try to grip the crank as high as possible, close to the BB. Get a punch (a piece of pipe, solid bar, a large bolt, or something similar) and rest it on the spindle inside and hammer it. You need also someone to help because the bike will rotate freely around BB, also the bike will fall off after it gets free

Provided that you have a decent bench vice it's doable.

Or better yet: a crank puller (or a 2 jaw bearing puller)