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Facebook cover photo size: 851 × 315 px

The profile and page cover, at the desktop upload size — and what mobile does to it.

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or click to browse, or paste with Ctrl/Cmd+V — drop several at once to process a whole batch

Facebook cover photo size at a glance

One upload, two different shapes

The cover photo is the classic example of a platform showing different crops of the same file. On a desktop browser it is displayed as a wide, shallow band around 851 × 315; on a phone the visible area is closer to 640 × 360 — noticeably taller and narrower, cut out of the middle of what you uploaded.

That means the sides of your cover disappear on mobile and the extra height at top and bottom only appears there. The part visible on every device is the centre. Anything critical — a strap line, a phone number, a logo — belongs in the middle of the frame, well inside both crops.

Facebook compresses covers noticeably. For a photograph, a JPEG at this size is fine. For a cover that is mostly text or a logo, upload a PNG: Facebook's own guidance is that a PNG survives its compression better for flat graphics, and the difference on hard edges is easy to see.

How to resize an image to 851 × 315

  1. Drop your image on the panel above — or paste it, or drop several at once to do a batch.
  2. The width and height are already set to 851 × 315, and the aspect lock is off so both numbers are honoured exactly.
  3. If your source is a different shape, crop it to 2.7:1 first — resizing a different ratio straight to these numbers stretches it.
  4. Pick an output format. JPEG for photographs, PNG for flat colour, text and anything needing transparency.
  5. Download. Nothing was uploaded at any point — the resize ran on your own machine, in this tab.

Questions

Why does my cover look different on my phone?

Because the mobile view crops a taller, narrower rectangle from the centre of the same file. The left and right ends of a desktop cover simply are not shown there.

Why does my text look blurry?

Facebook re-compresses covers. Text and logos hold up better uploaded as a PNG than as a JPEG at the same dimensions.

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