how do these prepaid credit cards work, do you put money into it and keep refilling it or what, and can you shop online with them?

That is true you do put money on the card, and spend like a gift card, but this builds your credit if you have none. After a year or two being on time with your payments the credit card place will issue you a real credit card.

That is true you do put money on the card, and spend like a gift card, but this builds your credit if you have none. After a year or two being on time with your payments the credit card place will issue you a real credit card.