I did not create this, just sharing it here. as in don't come to me for support.
Activate multiple Steam keys in bulk with no hassle.
The Steam limit is around 40ish keys per hour(?). I haven't tested it much.
Feel free to let me know if you've tested more. 10 incorrect keys will trigger an early cooldown.
If you don't have bulk keys, you can use ChampBill's Steam Key Generator alongside this program.
It is in the hidden tag aswell.
Leechers will be reported.