Services that will show a link preview in Telegram, if the preview is enabled:

  • Youtube
  • Instagram
  • Google Plus
  • Facebook (only public posts will be previewed)
  • Twitter
  • Play Store / App Store
  • Spotify
  • Soundcloud
  • 9Gag
  • Imgur
  • Google Docs
  • Dropbox
  • GitHub
  • Medium

NOTE: If you have disabled the image automatic download in some case, the image coming from the link preview won't be downloaded with the link, but only the text will be shown.

See also General Information about Link Previews because it's available for every website which supports the OG protocol.