Zenou math

Doorways

Places to go when a page will not load

Five third-party doorways, listed with the address they actually live at. Each one opens in its own tab, at the top level, because that is the only place these tools work: a proxy needs its own origin to register a service worker, and a sandboxed frame never allows one.

Every doorway below is somebody else's service. This page does not run them, cannot see what you send through them and cannot promise they stay up. They are checked from your browser when the page loads, so the dot shows whether you can reach the address right now, not what some server saw yesterday.

If a doorway is down, it is down for everyone: these are volunteer-run services with no uptime promise, and their addresses move every few months. Nothing here is copied or re-hosted. Rules for using a doorway are in the Acceptable Use Policy; the short version is that a doorway is not permission to reach something you are not allowed to reach.