Here's a quick and dirty one I wrote in a hurry about 20 years ago. It still works.

Download KeyPress Detect from this link

Run the downloaded file

Pressing N should show 78 N (78 is the ASCII value for N)

Pressing W should show 87 W (87 is the ASCII value for W)

(It is safe to run, in case you get an A/V or Defender alert.)

BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones