Open Graph and Twitter Card Checker

Why a link preview comes up blank

Almost always one of three things. The og:image is a relative path rather than a full URL, so the platform cannot resolve it. The image is behind a login or a robots rule, so the crawler gets a 403. Or the tags are added by JavaScript after the page loads — social crawlers do not run scripts, so they see the empty original HTML.

This checker reads the page the same way a crawler does: it takes the served HTML and does not execute anything. If a tag shows here, a crawler can see it.

Caching, and why your fix has not appeared

Platforms cache what they scraped, often for days. Correcting a tag does not update a preview that has already been fetched. Facebook and LinkedIn both publish a debugger that re-scrapes on demand; use that after fixing, rather than assuming it did not work.

What we do with the address you enter

We fetch the page from our server, because a browser cannot read another site's HTML. We take only the meta tags, never the page contents, and keep no log of what was checked. Requests are limited to public web addresses over http and https, redirects are checked at every hop, and the download is capped — so this tool cannot be pointed at anything private.