Input and output PNG files with support for alpha channel.
Don’t forget to vote for your proposal…
I am missing an option to export photos as png — in addition to the already existing JPEG and TIFF options …
Welcome! A feature request for this already exists. You can vote for it:
Merged to the existing one.
ImageMagick is an excellent tool for converting between image file formats. No data loss going TIFF <–>PNG. It can also resize and perform basic image processing operations like sharpening, cropping, etc.