Type a title and description, preview the card live and download a 1200×630 PNG for WeChat, X and Slack
Long titles wrap onto a second and third line; anything past that is cut rather than shrunk.
The card is drawn on a canvas in your browser and downloaded straight from there, so the image never reaches a server. Output is a 1200×630 PNG you can point og:image and twitter:image at. Most clients also read og:title and og:description, so keep them in sync with the card.