How to Fix Facebook Preview Image Size in 2026

If your Facebook preview image looks weird, start with the ratio. Make the image 1200 x 630 pixels or another clean 1.91:1 size. Do not start redesigning the whole brand card until the basic shape is right.

A square image, vertical image, tiny thumbnail, or giant hero graphic can all technically load, but Facebook may crop it in a way that makes it look accidental.

Your page should include one clear `og:image` tag pointing to the image you actually want Facebook to use. Make it an absolute URL, not a relative path. Use HTTPS. Make sure the URL opens directly to the image.

If your site has multiple conflicting image tags, Facebook may pick the one you did not expect. Keep the head clean and make the preferred image obvious.

This is where a lot of people get stuck. The image works in their browser because they are logged in, using a warm cache, or bypassing some restriction. But Facebook's crawler hits the URL like a stranger.

If a stranger cannot access the image without cookies, auth, or special headers, your preview can fail. The fix is usually making the OG image public and boring.

After updating the image, retest the URL. If the new `og:image` shows up in the tester, you know your page is now sending the right metadata.

Then give Facebook time to update its cached version. Do not keep changing five things at once. Change the image, confirm the live tags, then wait or refresh the cache.