PreviewChecks · X / Twitter
Twitter/X card validator
Check the current card type, selected title, description and image tags, plus image and crawler diagnostics.
PreviewChecks illustrates summary and summary large image layouts. Missing, conflicting, app, player or unknown card values stay visible in the report with an explanation when a card preview is unavailable.
example.com
Your social preview title
The description will show how your link may appear before people click it.
Choose a card type for the image
A summary card is illustrated with a small square thumbnail beside the text. A summary large image card uses a wide image above it. Changing the card type does not resize or crop the source image.
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="Product update">
<meta name="twitter:description" content="What changed and why it matters.">
<meta name="twitter:image" content="https://example.com/social-preview.jpg">
<meta name="twitter:image:alt" content="A dashboard showing the new reporting view">The report shows the selected tag and value for each field, along with the checked image dimensions, delivery result and crawler-like checks.
What this check verifies
PreviewChecks reads the current page and builds an illustration from its metadata. It does not verify X's cache, fetch from an X IP address or refresh a published post. App, player, missing, conflicting and unknown card values are reported without a simulated card.
For Open Graph tag definitions, see the Open Graph protocol. For automated checks, see the PreviewChecks API.
For image sizing and crop checks, see the Open Graph image size guide.