The recommended 페이스북 Facebook page cover spec is 820×312 px (2.63:1). 820×312 on desktop, cropped to 640×360 on mobile. 90px on each side is hidden on mobile — center your content.
"Fill" center-crops when the ratio differs. "Fit" pads with the chosen color. "Fit width" keeps the height ratio, for detail pages.
Drag the preview of a "Fill" result to move the crop.
JPG, PNG or WebP, quality 50–100. Each result card shows size and weight.
Select several files to convert them to the same spec and download with "Save all".
820×312 px, ratio 2.63:1. 820×312 on desktop, cropped to 640×360 on mobile. 90px on each side is hidden on mobile — center your content.
Choose "Fit (padding)" to avoid cropping; with "Fill" you can drag the preview to move the crop.
Upscaling beyond the original blurs. Use the largest original you have; when downsizing, quality 90+ is visually lossless.