Description
Bought a new monitor, or picked up a used one, and want to check for dead pixels, backlight bleed or banding but don't know what to test with? Screen Test works right in the browser—over thirty built-in fullscreen test patterns; fill the screen with a solid color and stuck or dead pixels show themselves instantly. Pure black for bleed, pure white for uniformity, gradients for color steps, grids for geometry — check common panel faults one by one.
No install needed — switch patterns fullscreen with one tap in the browser (a macOS desktop version exists too). It only shows patterns and does no harm to the screen, handy for inspecting, choosing and self-checking displays. Sweep a used monitor with it before buying and dead pixels and bleed have nowhere to hide.
34+ test patterns: over thirty patterns — pure red/green/blue, grayscale, gradients, grids — each built to expose a different display problem.
Dead-pixel check: fill the whole screen with a solid color to spot stuck or dead pixels at a glance.
Bleed & uniformity: pure black and white reveal backlight bleeding and whether brightness is even — a must for checking a used monitor.
Vertical banding: dedicated patterns to check vertical banding, ghosting and other panel defects.
Ready in the browser: runs right in the browser, no install, switch patterns fullscreen with one tap.
Safe for your device: it only displays test patterns and does no harm to the display.
No install needed — switch patterns fullscreen with one tap in the browser (a macOS desktop version exists too). It only shows patterns and does no harm to the screen, handy for inspecting, choosing and self-checking displays. Sweep a used monitor with it before buying and dead pixels and bleed have nowhere to hide.
Features
34+ test patterns: over thirty patterns — pure red/green/blue, grayscale, gradients, grids — each built to expose a different display problem.
Dead-pixel check: fill the whole screen with a solid color to spot stuck or dead pixels at a glance.
Bleed & uniformity: pure black and white reveal backlight bleeding and whether brightness is even — a must for checking a used monitor.
Vertical banding: dedicated patterns to check vertical banding, ghosting and other panel defects.
Ready in the browser: runs right in the browser, no install, switch patterns fullscreen with one tap.
Safe for your device: it only displays test patterns and does no harm to the display.
