Resize images for Facebook

The 1200 × 630 link card

The most consequential Facebook image is often not a post at all — it is the preview card generated when someone shares a link to your site. That card reads the Open Graph image from your page, and 1200 × 630 is the size it expects. Getting it wrong produces a cropped or stretched preview on every share of that page.

The same file works as a general feed image, which makes 1200 × 630 a sensible default for anything that will be shared.

Covers are cropped differently on phones

Page covers are displayed at different crops on desktop and mobile — the sides are trimmed on narrow screens. Keeping logos and text well inside the central area of a 1640 × 856 cover is the practical way to survive both, since there is no single safe rectangle that satisfies every layout.

Compression on upload

Facebook re-encodes uploaded images, and heavily compressed sources fare badly. Export at the target dimensions with quality around 85 rather than aggressively compressing first; the file you upload is not the file that gets served.

Text inside images

The old rule limiting text to 20 percent of an ad image has been retired, so a text-heavy image will no longer be rejected outright. Reach is still affected in practice, and the underlying reason has not changed: a feed image competes at thumbnail scale, where dense copy is unreadable.

The practical guidance is unchanged even though the rule is gone. Keep any text large enough to read on a phone, keep it away from the edges where different surfaces crop differently, and put the detail in the post copy where it can be read properly and indexed.