Rivlet takes any website and wraps it into a dedicated Mac app complete with its own Dock icon, native notifications, and badge counts. Because every Rivlet app has strictly isolated cookies and storage, you can easily run two instances of the same site signed into completely different accounts. Built on the native macOS WebKit engine, the apps share a single runtime, meaning each one weighs in at less than 1 MB while still offering power-user features like custom CSS and Greasemonkey-style userscripts.
Rivlet
Free your most-used web apps from the clutter of your browser by turning them into lightweight, isolated Mac apps.
Free and open source. Requires macOS 26 or later.
Highlights
- Strictly isolated cookies and storage for multi-account login.
- Lightweight footprint at under 1 MB per app.
- Native notification and badge count support.
- Support for custom CSS and Greasemonkey-style userscripts.
- Free, open-source, and MIT licensed.