Privacy
Untail doesn't use accounts, cookies, tracking pixels, advertising scripts, or a database of links. The site uses a service worker for optional offline access.
What happens to your link?
Regular links are cleaned inside your browser. If you paste a supported short TikTok or t.co link, your browser sends that URL to the Untail server so it can request the redirect from TikTok or t.co. Those platforms see a request from the server. The server returns the redirect destination without storing the link in an application database.
Hosting providers, reverse proxies and network infrastructure may still process technical logs or metadata. In particular, a Share Target or Shortcut that opens this app with a ?url= parameter can expose that URL to browser history and hosting access logs; Untail removes it from the visible address bar as soon as the page loads.
What this does not do
A clean URL does not make you anonymous to the destination service. A site may still track visits with cookies, account logins, IP addresses or link paths. If expansion is unavailable, Untail will not claim an opaque TikTok short code is safe.
Contact & hosting
This project is self-hostable. The person who deploys it is responsible for their hosting provider's log retention and local privacy requirements. Review your reverse-proxy and CDN settings before public launch.