I've got a logo I'm attempting to use as a profile image for a Twitter account and unfortunately each time I upload my PNG file, it's clearly getting converted to JPG which is introducing compression artifacts. I've got it properly sized to 400x400 pixels and have played around with introducing transparent pixels into the image to prevent the conversion. But to no avail.
Anyone have any suggestions regarding approaches you've used to prevent JPG conversion?
As others have suggested, first: Add at least one pixel of transparency to the image (use the corners of the image, where it will be cropped to a circle anyway)
Secondly though: Use the mobile interface to upload. Otherwise the desktop interface will convert to jpg when it asks to resize, transparency or not, resized or not. You don't actually need to be on mobile to do this: https://mobile.twitter.com/home will do.
You need to force Twitter to respect your png. And for twitter png means "transparency".
So just add 1 pixel (or line) of 1% transparency and save as truecolor PNG and it should work.
