# Preview links When the AI starts a web app in your container, the chat shows it in a side panel. Its address is a preview link. The link carries its own permission, so it opens without a ZeroLog sign-in, and for that reason it expires. - **Expiry:** a preview link lasts 7 days by default. When you create one yourself you can choose 1 hour, 24 hours, 7 days or 30 days. Nothing lasts longer than 30 days. - **Where:** the **Links** bar above the message box lists what is open in the chat. A green dot means something is listening on that port right now. Open **Sharing** to see when each link expires. - **Share:** pick **Valid for**, then **Create share link**. Treat the address like a password: anyone who holds it can open the page until it expires or you revoke it. - **Revoke:** **Revoke** ends one link; **Revoke all links** ends every link of the container, including older ones. Whoever opens a dead link sees "Preview no longer available" (HTTP 410), and you can create a new one. - **Automatic links** for the side panel are reused while they have at least an hour left. Otherwise a fresh 7-day link is made. - Only the owner can create and revoke links. Members of a [shared container](https://zerolog.ch/docs/share) cannot. Previews run sealed off from your account, see [isolation](https://zerolog.ch/docs/isolation). They are not [public ports](https://zerolog.ch/docs/ports): they use no port quota and no permanent address.