You can run PsyToolkit experiments in two different modes:

Advantages: - Runs on any computer with a browser - Allows online data collection

Disadvantages: - Online experiments limit your control of the experimental situation - Timing is likely not as precise as Desktop version (although still reasonable)

Advantages: - Runs with extreme timing precision (millisecond resolution) - Allows to use external reaction time keyboards (such as Cedrus)

Disadvantages: - Runs only on Linux computers (although anyone can easily install Linux free of cost)

How to use PsyToolkit on Linux can be read here