There’s a no Javascript front page for Catbox. I’m not sure why you’d subject yourself to the torture of having to use it, but it’s there for those so inclined. In this update I’ve also made PHP sessions persist across subdomains, so I’ve changed the QT to make use of that. In accordance, you should now send your userhash when making a GET request (i.e. ShareX), then the URL. Previously, shortened URLs had their owner designated by IP addresses (horrible, I know.).