Social preview checker
See the card your link will show when it is shared on X, LinkedIn or Slack, and what to fix before launch day.
What makes a good share card
Sites build the card from your page's Open Graph tags: og:title, og:description and og:image, plus twitter:card on X. Use a full https:// image URL, a 1200 by 630 image, a title under about 70 characters, and summary_large_image for a big picture on X.
This checker reads the page the way those sites do, from the HTML. Tags added later by JavaScript are not seen. Sites also cache cards, so a fix can take a while to show where the link was already shared.
Getting ready to launch? See where to launch or submit your startup.