You can put it in the fridge, but that would cause the fat to start to oxidize, and turn rancid.
assitant
You can put it in the fridge.  But when you take it out, it’s going to melt into a cold greasy puddle, so I think it’s best to freeze it.
assistant
How can I save leftover bacon grease?
user
I’d recommend pouring it into a bottle and freezing it. The fat won’t go rancid in the freezer, and you’ll be able to re-melt it later and cook with it.
assistant
Do I have to freeze it or can I put it in the fridge?
user