see how your link looks when shared
paste any page and see the card people get on X, LinkedIn, Slack and iMessage, and the snippet Google shows. every Open Graph and Twitter tag is checked, with what to fix.
free · no sign-up · nothing stored
what it checks
- og:image: the picture on the card. without it, your link shares as plain text. 1200×630 pixels works everywhere.
- og:title and og:description: the words on the card. titles under 60 characters and descriptions of 110 to 160 read best.
- twitter:card: "summary_large_image" gets the big card on X instead of a small square.
- canonical: tells Google which address is the real one, so shares and search point to the same page.
why your preview matters
most people decide whether to click from the card alone. a big image and a clear title can get several times the clicks of a bare link, and the same title and description are what Google shows in its results.
every update founders post on commiToday gets its own page with a share card made for it automatically, with the headline, the label and the founder's streak.
questions
+why does my old image still show on X or LinkedIn?
they keep a copy of the card for a while. after fixing your tags, ask LinkedIn's Post Inspector to refresh it; X refreshes on its own within a day or so.
+what size should og:image be?
1200×630 pixels, under 5 MB, as PNG or JPG. keep text away from the edges, since some apps crop the sides.
+does this work for pages behind a login?
no. like X and LinkedIn, it reads the page as a visitor who isn't signed in, which is what everyone sees when you share it.
+is it free?
yes, with no sign-up. there's a limit of 30 checks every 10 minutes so it can't be used to flood other sites.