How to Get Sharp(er) Facebook Cover Photos
Getting fuzzy images, text, or logos on your Facebook images? Facebook has closed some of the old loopholes, but here's a tip worth trying.
If your logos and watermarks are looking fuzzy on your Facebook cover ... but for now, if you look at the website version on a Retina display, you get a jarring contrast between the crisp photos on your timeline and the much-less crisp cover photo. ... quality setting (90) when creating the version that's uploaded to Facebook.