Create a 32 bit logo with alpha


Hello everyone, I have to create a 32 bit image with alpha for the logo to put in the store. In the past I solved this problem, but today I’m going crazy I can not generate this kind of image. Can you tell me with which free software I can do it? I do not have photoshop.

#2 (App graphics)
or (a bit like Photoshop)


Thank you for the links. Unfortunately I could not solve. I have a 512x512 image that I need to update on the store, but it asks me 32 bit alpha, but I can not process it that way.


Thanks, I solved. I was wrong to do something. Good first link