How previews work
Eligible unprotected image and video shares can expose a verified preview to services such as chat clients. Protected, burn, expired, or disabled previews are refused.
Disable before upload
Turn off link previews in the share options before upload when the image itself should not be fetched by third-party services.
Third-party caches
Note: A third-party service may cache a preview after fetching it. Deleting the Astral share cannot force another provider to erase its cache.