First, let the tools cache
Visit while online and open Install app to check the offline status. The service worker caches the tool pages, guides and local libraries. A first visit requires internet. Your browser may remove cached files when storage is low or site data is cleared.
Android, Windows and Linux
In Chrome or Edge, use Install app when offered, or open the browser menu and look for Install. On Android, the wording can be Add to Home Screen. Firefox supports normal website use; installation options vary by platform.
iPhone and iPad
Open the website in Safari, tap Share, then Add to Home Screen. Choose Open as Web App if offered. Launch the home screen app once while online so that its own browsing context can cache the tools.
macOS
In Safari, choose File, then Add to Dock when available. Chrome and Edge may offer installation in their address bar or menu. Launch the installed app online first and verify its cache status.
What works offline?
Generation, customization, local image decoding, payload inspection, exports and local history are designed to work after caching. Camera scanning also works where the browser permits it. Opening websites, media documents or payment links can still require internet and other installed apps.
Updates
When a new app version is cached, a restrained update control appears. Finish your current work before selecting Update & reload. Installation and storage behavior should be tested on the actual device you plan to use.