Remove alpha channel in an image

Question

I have an app icon for iOS but Apple doesn\'t allow alpha to be in the image. How to remove this alpha channel? I only have the png image with me I don\'t have the source fi

Answer 1

To remove alpha channel from png:

on Mac: Preview version 9.0 (macOS Sierra) can remove the alpha channel if you export or save the image.

Preview version 10.0 (944.2) (macOS High Sierra) does not remove the alpha channel. Both Export and/or Save does not remove the alpha channel from the image.