Generate an OG image
Type a title, pick a ratio, download the PNG. That's the whole tool.
What's rendering it
This is not a canvas mockup. Every preview is a live render from turbo-start-sanity's OG route, the same ImageResponse code the template ships, running on this site's edge runtime with a year-long immutable cache in front of it. The card you download is pixel-identical to what a site built on the template serves to crawlers.
The three sizes cover the jobs that matter: 1200x630 for link unfurls everywhere (X, LinkedIn, Slack, iMessage), 1080x1080 for square feed posts, and 1080x1350 for Instagram portrait.
Want it automated instead
Downloading PNGs one at a time is fine for a landing page. For a site, wire the route in so every page gets its card generated on demand. The code is MIT-licensed in the turbo-start-sanity repo, and Never "design" an OG again walks through extending this exact template to render every aspect ratio from one design, with real benchmarks and the production failure modes.
If you'd rather someone else wire it up, that's what we do.