Facebook Preview Not Showing? Do This

Open the live page and confirm the rendered HTML includes `og:title`, `og:description`, `og:image`, and `og:url`. If those tags only appear after JavaScript runs in the browser, a crawler may miss them.

The safest version is server-rendered metadata in the initial document head. Simple, visible, boring, effective.

Use a public HTTPS image URL. Avoid redirects when possible, avoid auth, and make sure the image is not blocked by firewall rules, bot filters, or hotlink protection.

If the image URL returns an error, requires cookies, or loads only for your browser session, Facebook may show a blank card or skip the image entirely.

After you publish metadata changes, test the URL again. If the updated values appear here, the page itself is fixed even if Facebook still shows an older cached card for a little while.

This is the point of using a preview tester before you start guessing. First confirm what your page is actually sending. Then worry about the platform cache.