How to test Open Graph tags: sharing previews and current tools
Test with the Facebook Sharing Debugger first, then inspect the page source and test an X share or post preview. For messaging apps (Discord, Slack, WhatsApp, iMessage), test manually in a private conversation because each service caches previews separately. Keep a short checklist of the platforms that matter to your audience.
Platform debuggers and share previews let you test the tags that each crawler sees. The Facebook Sharing Debugger at developers.facebook.com/tools/debug is useful for Facebook's extracted title, description, image, URL, and type. X no longer has the old Card Validator workflow as a dependable public check, so inspect the page tags directly and test a normal post preview. LinkedIn's inspection flow plus manual Discord, Slack, and WhatsApp shares round out the toolkit.
By TechCompare · Updated
How this is calculated
Facebook's Sharing Debugger shows what Facebook extracted from your page: title, description, image, URL, and type. It also reports warnings and lets you request a fresh scrape. For X, inspect the `twitter:` and `og:` tags, make sure the image is publicly fetchable over HTTPS, and test an ordinary share or post preview. The common failure across platforms is a missing or unreachable image, an unsupported format, or a crawler seeing stale cached HTML.
Verdict
Each platform exposes a different check: the Facebook Sharing Debugger, LinkedIn's inspection tools, an X share or post preview, and manual Discord, Slack, or WhatsApp shares. Common failures revolve around the image, usually from an unreachable HTTPS asset, unsupported dimensions or format, stale cached HTML, or a crawler being blocked before it can read the tags.