Facebook automatically resizes and formats your photos when you upload them. To help ensure that your photos appear in the best possible quality, try these tips:
Resize your photos to one of the following supported sizes:
Normal photos: 720px, 960px or 2048px wide
Cover photos: 851 px by 315 px
To avoid compression when uploading your cover photo, make sure the file size is less than 100KB.
Save your image in format JPEG and with a color profile sRGB
