Screen
Screen Tester
Fill your screen with solid colours to spot dead or stuck pixels, uneven backlighting and burn-in.
Start
or press F
Colours, in order:
Controls
Space / → / click: next · ←: previous · Esc / X: exit · 1–9: jump to a colour
Tip: a dead pixel shows up as a dot that stays black on every colour; a stuck pixel stays one colour.