Why Slack Link Previews Matter
When you share a link in Slack, the unfurled preview card is what makes your link clickable and engaging. A well-crafted preview with a clear title, description, and image drives clicks and conversation. A plain URL gets ignored.
Slack has an extra layer of complexity: workspace-level settings that control whether links unfurl at all. Even with perfect OG tags, previews won't show if unfurling is disabled.
Slack Link Preview Requirements
- Required tags: og:title, og:description, og:image
- Image size: No minimum (flexible)
- Workspace setting: "Unfurl links in messages" must be enabled
How to Check Your Slack Preview
Use Proovd to paste any URL and see exactly how it renders on Slack — along with X, LinkedIn, Discord, WhatsApp, and Reddit. One tool, six platforms.
Quick Fix Checklist
- Confirm og:title, og:description, and og:image tags are present
- Enable link unfurling in workspace settings
- Check robots.txt allows Slackbot-LinkExpanding
- Test with Proovd before posting
Frequently Asked Questions
How do I check my Slack link preview?
Use Proovd to paste your URL and see exactly how it renders on Slack. Slack needs og:title, og:description, and og:image tags to unfurl links in messages.
Why does Slack not show link previews?
Slack link previews can fail if link unfurling is disabled in workspace settings, if OG tags are missing, or if the page returns an error to Slack's crawler.