When you search for payday loans online, make sure you also compare the APR that different companies charge. A low APR means that you could easily end up paying a lot more when you get your loan repaid.
You can find different lenders online that offer you very competitive interest rates. The way you choose the one that you want to work with is to do a comparison between the different companies that are offering the loans.
You may find that the lower interest rates on the payday loans online from a specific company might be because it has a reputation for offering the lowest possible rates. You should check with your friends and family to see if they have used this particular company before.