Facebook Cover Photo Size Resizer

Facebook shows cover photos differently on computers and phones, which is why a cover that looks right on a laptop can lose its edges on a phone. Meta recommends an sRGB JPG of 851 × 315 pixels for the fastest loading and says phones show the cover at a 2.4:1 ratio, aligned to the left. This tool resizes your image to that size (or double it for sharp screens), and draws a guide marking the strip phones cut off and the area behind the profile picture. Group and event cover sizes are included too.

How to use this tool

1. Choose your image or several images.
2. Pick the profile/Page cover, its 2× version, a group cover or an event cover.
3. Crop to fill and move the position, or keep the whole image on a colour or blurred background.
4. Check the guide preview: keep text out of the red areas.
5. Download the JPG, or PNG if the cover has a logo or text.

Formula

phone view width = height × 2.4 (from the left edge) · scale = max(851 ÷ width, 315 ÷ height) × zoom

For 851 × 315 the phone view is 315 × 2.4 = 756 px wide, so the right 95 px are shaded. "Maximum file size" lowers JPG quality in 6-point steps until the file fits; Facebook's help says covers load fastest under 100 KB.

Example

A 2400 × 1600 photo gives scale = max(851/2400, 315/1600) = 0.355. The kept window is 2400 × 888 px: the full width and the middle 56% of the height. On a phone only the left 756 of the 851 px are shown, so a logo placed at the far right would be cut off.

What Meta says about cover photos

Meta's help page says the cover must be at least 400 × 150 px, loads fastest as an sRGB JPG of 851 × 315 px under 100 KB, and that PNG gives better results for covers with a logo or text. The left side is partly covered by the profile picture, which overlaps the cover by about 40 px on phones. The group (1640 × 856) and event (1920 × 1005) sizes are the ones commonly recommended for those layouts.