The Social Preview Tester simulates how your page renders when shared across Facebook, LinkedIn, Twitter, WhatsApp, iMessage, Slack and Discord. Each platform interprets your OG tags slightly differently. A preview that looks great on Facebook can break on LinkedIn. This index covers fixes per platform.
Each platform has its quirks. Pick yours:
summary_large_image vs summary decision. The image-aspect-ratio differences from LinkedIn and Facebook.theme-color, oembed). The colour-bar pattern, the larger-image vs small-thumbnail decision.Most preview issues trace back to OG tag implementation:
The tester renders your URL the way Facebook, LinkedIn, Twitter, WhatsApp, iMessage, Slack and Discord each render it. Side-by-side previews show where the page works and where it breaks. For the full reference, see the Social Preview Guide.
Run the tester before promoting any URL. Catching preview problems before launch beats fixing after.
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