if you have a credit card gift certificate can you use it to buy things online?

Answer 1

Oh, so you got a gift certificate directly from the credit card company? In that case you should be able to use it just about anywhere online. If it's a gift certificate from a merchant, you may not be able to redeem it with that merchant online. They have no incentive to let you redeem it because they've already gotten their money. But if it's from your credit card company that will be just like cash to the merchant.

The only restrictions on your certificate would be made by the credit card issuer. I would go to their website and see if they say anything about "good at participating merchants." If it says "good at any merchant" then you should be fine.