Banks create money by lending deposits. They cannot create money out of thin air.
Fractional reserve banking means you have created money. 500 years ago.....You (banker) have one bar of gold in your vaults but have loaned out the equivalent of three bars of gold. Your business behaves as if it possesses three bars of gold not just one. Same thing goes on today but the banks are accountable for the books they keep on all this activity
But the Fed is where the real money creation and destruction takes place