betterimage.io
Paste a link, get a social card in every size you post
Nobody clicks a naked link. betterimage.io turns a post into a social card in under a minute: paste the URL and the editor fills in the title, description, author and images, on a design picked to fit the page. Or start from one of 100+ designs. One card exports at every size you post: link preview, YouTube thumbnail, Instagram square and portrait, story and Pinterest pin. Free with a small watermark and no signup; $4.99 once for clean files.