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When someone pastes your short link into Slack, LinkedIn, WhatsApp, or similar apps, the platform fetches link preview tags to render a preview card. linkutm lets you override the preview title, description, and image per link without touching the destination page.

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When to use it

  • Destination doesn’t have preview tags (or has bad ones).
  • You want a campaign-specific preview without changing the page.
  • A/B testing share previews across channels.

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How to use it

1

Open Advanced → Social preview

In the link creation, expand Advanced and find the Social preview section.
2

Set preview fields

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Card headline. Keep ≤60 chars.
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Subline. Keep ≤155 chars.
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Public image URL. Recommended 1200×630px PNG/JPG.
Link Preview modal - editable preview title and description fields with social card preview

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Real-world example

Same destination URL, different previews per channel:
Same destination https://acme.com/launch. Per-link preview settings drive different share cards.

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Common mistakes

If the destination already has correct preview tags, you don’t need this. Override only when you want different cards per link.
LinkedIn and Meta cache preview data. Use their debug tools to flush after changes.
Files over ~5 MB or URLs behind auth won’t render. 1200×630 PNG/JPG, public.
If your preview image address starts with http instead of https, some platforms block it from showing. Always use an https image address.

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Edge cases

Imported links auto-fetch preview data from the destination during import (5s timeout). If the fetch fails, the favicon falls back to Google’s favicon service for the destination domain.