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It's easy to share web content like articles, pages, and tweets in Slack. When you share a link, you'll see a preview of the content just below your message. If you don't want to see link previews, you can turn them off altogether.
To share a link in Slack, just copy and paste the URL into the message field and send. Most links will automatically expand to show a preview of the web page. Here's an example from the desktop app:
Note: It’s not possible to hyperlink words in a Slack message.
When previews don't display
Here are some reasons your link may not expand to show a preview:
The link contains no preview data. If the web page doesn't include the necessary embedded data, the preview won't expand.
You linked to a private page or file. For example, you won't see a preview of password-protected YouTube or Vimeo videos.
It was recently posted by another member of your workspace. No attachment will expand if that link was shared in the same conversation within the past hour.
You haven’t added the Twitter app yet. If Twitter URLs don’t expand to show the full tweet, add the Twitter app to your workspace.
The link was to video or audio hosted by a service we've yet to whitelist. We're working to whitelist more services in future!
http:// was not included. Try adding http:// and your link should expand.
Your message contains more than four links. If your message has five or more links included, they won't expand.
Manage link previews
Remove a link preview
From your desktop, hover over the link preview.
Click the that appears on the left side.
Note: It's not currently possible to remove a link preview from the mobile app.
Turn off link previews
If you’d prefer not to see previews for shared links, you can adjust your settings:
From your desktop, click your workspace name in the top left.
Select Preferences from the menu.
Select Messages & Media.
Under Inline Media & Links, check or uncheck these options: • Show text previews of linked websites • Show images and files from linked websites
Note: For some apps and integrations, link previews won't be disabled when the options above are unchecked.
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