Publishing
Link previews
Every page unfurls as its own card in Slack, Discord and X.
Paste a link to any page into Slack, Discord, X or iMessage and it unfurls as a card for that page.
The default card#
With nothing uploaded, DocSpell draws a card for each page: its title, its description (or first paragraph), and your accent colour. Try it with this page.
Your own image#
To use an image instead:
- Doc space: upload one under Social preview in settings. It's used for every page that doesn't have its own.
- One page: add an image under the page's description in the editor.
Images need to be PNG, JPEG or WebP. Most apps that unfurl links don't render SVG. 1200 × 630 is the size to aim for.
Last updated Oct 5, 2026