Facebook is the platform where the same image is cropped most differently by device: the page cover is stored at 851×315 but shown at 820×312 on desktop and 640×360 on phones, so anything near the left and right edges disappears on mobile. Feed posts look best at 4:5 (1080×1350) or square; link posts use the 1200×630 frame; event covers are 1920×1005 and group covers 1640×856.
Every Facebook size on this page, verified for 2026: Story 1080×1920 px (9:16 · up to 30 MB), Square post 1080×1080 px (1:1), Portrait post 1080×1350 px (4:5 · recommended), Link / landscape post 1200×630 px (1.91:1), Page cover photo 851×315 px (desktop shows 820×312, mobile 640×360), Event cover 1920×1005 px (1.91:1), Group cover 1640×856 px (1.91:1), Profile photo 320×320 px (1:1 · circle). Each card is a live preview of your image in that frame — drag to reposition, slide between Fit (whole image, background added) and Fill (frame covered, edges cropped), then download the one you need or every size as a ZIP. Nothing is uploaded; the rendering runs in your browser.
For covers, use Fill and drag the preview so faces and text sit in the middle 640 px. Facebook keeps JPGs under 100 KB reasonably intact and recompresses anything larger — export at quality 80–85, or as PNG for logos and text-heavy graphics.
This is a pre-set view of the Social Media Image Resizer. Every other platform is one tab away.