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Free tool
Enter a page to see the card people get when the link is shared, and which Open Graph and Twitter tags are set or missing. No account needed.
<meta property="og:title" content="Custom Printed Mugs for Teams" /> <meta property="og:description" content="Free proofs and low minimums." /> <meta property="og:image" content="https://acme.com/og/mugs.png" /> <meta property="og:url" content="https://acme.com/mugs" /> <meta property="og:type" content="website" /> <meta name="twitter:card" content="summary_large_image" />
If og:title or og:description is missing, most apps fall back to the page title and meta description. If og:image is missing, the card shows no image or one the app guesses, which is the usual cause of a preview that looks wrong.
The same check also reports the title, meta description, canonical, structured data and indexability. For that view, use the free SEO checker, or preview the Google result in the SERP simulator. The Seology AI SEO agent finds pages with missing tags across a site and delivers the fixes.
Meta tags in a page head that tell apps how to present a shared link: og:title, og:description, og:image and og:url. Facebook, LinkedIn, Slack, WhatsApp, iMessage and Discord all read them.
A 1200 by 630 pixel image, a 1.91 to 1 ratio, displays well across the major platforms. Use an absolute https URL and keep the file small enough to load quickly.
Platforms cache previews. After you change the tags, refresh the cache with the platform tool, such as the Facebook Sharing Debugger or the LinkedIn Post Inspector, or wait for the cache to expire.
X falls back to Open Graph tags for the title, description and image, so the one tag worth adding is twitter:card set to summary_large_image, which asks for the large image layout.
No. They control how a link looks when shared. A clear preview can earn more clicks from social posts and messages, which is the reason to get them right.
No. The page is fetched, read and the result is returned to your browser. Nothing is saved.