That’s right. You can now upload .PNG files to Facebook for cover photos and profile photos on your Facebook page.
The Facebook Marketing page just outlined the update in a post, saying:
You can now upload PNGs for profile and cover photos on your Pages. Although PNGs have higher file sizes, they are higher quality, which means better images on your Pages.
Why is this important or post-worthy? Well, if you hadn’t noticed, many times an uploaded cover photo would appear grainy, blurry, or slightly distorted on a Facebook page. Even if you created a photo to the specific dimensions recommended by Facebook, there was still a chance it would appear “off” when viewed on the page.
This odd visual “artifacting” always bothered me, and hopefully this PNG update solves the issue! Facebook’s help docs make mention of the new PNG file upload, saying that it will provide a higher quality upload.
To get the best fastest load times for your Page, upload an sRGB JPG file that’s 851 pixels wide, 315 pixels tall and less than 100 kilobytes. For a higher-quality image, use a PNG file.
I wonder if files that were previously uploaded as PNGs to Facebook will now demonstrate their truly higher image quality, or if we’ll have to re-upload cover photos, profile photos, etc. to get the benefit.
Edit 08-07-13: Facebook’s help docs now state: “For images with your logo or text content, you may get a higher quality result by using a PNG file.” Interesting.
Take-away Point: No matter what, just upload images as PNG files from now on when using Facebook.