Facebook Sharing Debugger

The Facebook Sharing Debugger shows exactly how Facebook reads a URL: which title, description and image it extracts, and when it last fetched the page.

It is the tool for fixing wrong share previews — the common case where a page's Open Graph tags were updated but Facebook still shows the old cached version.

Re-scraping through the debugger forces a refresh, which is the standard fix and takes seconds compared with waiting for the cache to expire on its own.