Social Preview Tester
Simulate and test social preview link cards across X (Twitter), Discord, LinkedIn, Slack, and iMessage.
Mastering Cross-Platform Social Cards
A single high-converting link preview card commands attention across group chats, social feeds, and team workspaces. Test how your artwork adapts across dark and light interfaces before launching.
Frequently Asked Questions
Why do link previews look different across platforms?
Each platform parses and presents metadata differently. Twitter prefers 'summary_large_image', Discord shows colored sidebar embeds, Slack uses lightweight inline unfurls, and LinkedIn prioritizes formal author and domain credentials.
How does Discord generate link previews?
Discord parses Open Graph tags (og:title, og:description, og:image) and website <meta name="theme-color"> tags to color the left accent border of its rich embed. If og:image is missing, it falls back to Twitter Card tags.
What causes Slack unfurls to fail?
Slack requires fast response times from websites. If your server takes longer than 3 seconds to respond, or blocks Slack's crawler user-agent ('Slackbot-LinkExpanding'), Slack will only display the raw URL text without rich artwork.
What is the universal safe zone for cross-platform sharing?
Design your artwork at 1200×630 pixels and place all critical copy, brand logos, and callouts inside the central 1080×560 pixel rectangle. This prevents awkward crops across Discord mobile, Twitter desktop, and LinkedIn feeds.