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Open Graph image checker (og:image)

Check a page's og:image, the picture shown when the link is shared. See whether it's set, loads over https, its real size and ratio against the 1200 × 630 px (1.91:1) that large cards use, and whether it has alt text, with previews for Facebook, LinkedIn, X and WhatsApp.

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How to use the Open Graph & Social Preview Checker

  1. 1Enter the address of the page you want to share, such as yoursite.com/blog/new-post.
  2. 2Switch between Facebook, LinkedIn, X and WhatsApp to see each link card and its warnings.
  3. 3Edit the title, description or image URL to try fixes; the previews update as you type.
  4. 4Copy the corrected tags into your page's head, then schedule the post with Join Postly.

Frequently asked questions

What are the og:image size requirements?

1200 × 630 pixels (a 1.91:1 ratio) works across Facebook, LinkedIn, X and WhatsApp. Images under 600 px wide show as a small thumbnail, and Facebook ignores images under 200 × 200 px.

Why does my link preview show the wrong image?

Networks cache previews. After fixing og:image, ask them to re-read the page: Facebook's Sharing Debugger and LinkedIn's Post Inspector have a button for it. Changing the image's file name also forces a fresh copy.

Can an og:image be a WebP or SVG?

Use JPG or PNG to be safe. SVG isn't supported by Facebook, LinkedIn or X, and some apps still don't show WebP in link previews.

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