i3lock is a simple screen locker like slock. After starting it, you will see a white screen (you can configure the color/an image). You can return to your screen by entering your password.



Many distributions include i3lock as a (potentially optional) dependency of the i3 package (see Downloads). You can also look for the specific package in your distribution, e.g. on Debian and Debian-based distributions:

sudo apt-get install i3lock



i3lock is currently developed at https://github.com/i3/i3lock. Checkouts of the master branch are intended to be stable and working all the time. Integration of new features happens in a separate branch.