Installing VisUAL
Download VisUAL for your operating system from https://salmanarif.bitbucket.io/visual/downloads.html. Note your operating system must be capable of running Java 8 Runtime Environment, but no need to separately pre-install it.
Run VisUAL and set your default workspace directory. Example:

Should now see:
Here is an example file (sample_arm.s) that you can open/copy and then execute. You should see the Registers (R0, R1, ... ) being set with appropriate values.