X (Twitter) Cards Checker
Checks for X Card tags that control how the page looks when shared on X.
What this tool checks
Twitter/X card tags
Checks for twitter:card and, when relevant, twitter:title / twitter:description / twitter:image.
Why it matters: Twitter/X card tags control the preview when the page is shared on X. Without twitter:card, X falls back to Open Graph or a plain link.
If it fails: Add <meta name="twitter:card" content="summary_large_image"> plus twitter:title, twitter:description and twitter:image, or rely on complete Open Graph tags.
Source: developer.x.com/en/docs/x-for-websites/cards/overview/abouts-cards
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