betterimage.io

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: 1200x630 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. For developers there is a REST API and an MCP server.