What the tool does, how to run it, and what to expect from the result.
Go full screen and step through nine solid colours and five patterns. Gradients should be smooth; stripes mean banding. On the black-level screen you should tell the 3% square from black; if not, brightness or gamma is off. The sharpness grid alternates one-pixel lines, which blur or shimmer when the screen is not at its native resolution. The dark uniformity field shows backlight bleed and clouding, best viewed in a dark room.
A quick way to understand who this helps, what it solves, and where it connects next.
Gamers, PC builders and anyone checking a device before a warranty claim.
Using the screen test without installing anything or signing up.
Short answers for the questions people usually have before trying a utility like this.
Dim the room, set brightness to your usual level and open the uniformity pattern full screen. Light leaking at the edges or corners is bleed; some is normal on IPS panels.
An 8-bit panel shows 256 steps per colour, which can be faintly visible. Strong bands point to 6-bit panels, heavy colour processing or a compressed video signal.
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Full-screen colours and patterns. Clean the screen first so dust is not mistaken for a pixel.
A dot that stays black on every colour is dead. One that stays lit in one colour is stuck and may respond to the stuck pixel fixer.