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Twitter card: summary_large_image

The big-image card layout — Slack renders a hero image above the text.

Meta tags emitted

<title>Big image card | Slack Unfurl Playground</title>
<meta name="description" content="twitter:card=summary_large_image. Image fills the top of the unfurl." />
<meta property="og:title" content="Big image card" />
<meta property="og:description" content="twitter:card=summary_large_image. Image fills the top of the unfurl." />
<meta property="og:image" content="/api/og?title=summary_large_image&subtitle=1200%C3%97630&style=blue" />
<meta property="og:image:width" content="1200" />
<meta property="og:image:height" content="630" />
<meta name="twitter:card" content="summary_large_image" />

Test in Slack

1. Copy this page's URL from your browser.
2. Paste it into a Slack channel.
3. If Slack already cached this URL, append ?v=2 (or any fresh query) to bust the cache.