https://testufo.com/
UFO Test: Multiple Framerates
Blur Busters UFO Motion Tests with ghosting test, 30fps vs 60fps, 120hz vs 144hz vs 240hz, PWM test, motion blur test, judder test, benchmarks, and more.
ufo testmultipleframerates
https://testufo.com/whitelevels
UFO Test: White Levels (Clipping) Test
TestUFO: White Levels (Clipping) Test
ufo testwhitelevelsclipping