See exactly how your URL will render on every major platform — Facebook, X, LinkedIn, Slack, Discord, iMessage. Pixel-accurate mocks based on each platform's current card design. No more shipping with a broken unfurl.
Preview any URL
We fetch the URL (following redirects), extract all og:*/twitter:* tags, and render exact-spec mocks of each platform's unfurl.
Target image specs (2026)
• Facebook / LinkedIn / Slack: 1200×630 (1.91:1), >200×200 minimum, under 8 MB, JPG or PNG.
• X (Twitter) summary_large_image: 1200×628, 2:1 works, under 5 MB.
• X summary (small card): 144×144 minimum, 1:1 square.
• Discord: follows og:image; embeds up to 400 px wide.
• Always provide og:image, og:title, og:description, and og:url. Twitter falls back to OG when twitter:* is missing.