Bandcamp redeemer

This extension is for use with bandcamp.com/yum pages where artists have sent you multiple codes for redeeming their music for free. Simply click on the extension, paste the list of codes and the extension will try them until one works. Then it's up to you to enter your email (optional) and hit redeem. This extension simply removes the manual work of copying and trying each code separately. It doesn't not generate codes, it can only be used to try the codes you have already been sent.

Screenshots from Chrome Web Store