Screen Tools
Test dead pixels, check refresh rate, run color gradient tests, use your screen as a lightbox or webcam fill light, and more. 15 free screen tools — fullscreen mode, no signup, works in any browser.
15 free tools
White Screen
Pure white fullscreen display for monitor cleaning, brightness testing, webcam fill light, and use as a portable lightbox.
Open Tool →Black Screen
Pure black fullscreen for OLED backlight testing, burn-in prevention, dark backdrop for photography, and reducing eye strain.
Open Tool →Red Screen
Pure red (#FF0000) fullscreen for red subpixel testing, color channel isolation, night-vision preservation, and photography lighting.
Open Tool →Green Screen
Chroma key green fullscreen for virtual backgrounds, video production, and green subpixel color accuracy testing.
Open Tool →Blue Screen
Pure blue (#0000FF) fullscreen for blue subpixel testing, display color calibration, and photography backdrop.
Open Tool →Dead Pixel Test
Cycle through 8 solid colors to find stuck or dead pixels on any monitor, TV, or phone screen.
Open Tool →Monitor Test
All-in-one display diagnostic: dead pixels, color accuracy, gradients, sharpness, backlight uniformity, and geometry.
Open Tool →Screen Cleaner
Disable touch input and cycle white, black, and gray backgrounds to safely wipe dust and smudges off your display.
Open Tool →Digital Lightbox
Turn your monitor into a bright tracing light panel with adjustable brightness and color temperature for artists and photographers.
Open Tool →Webcam Light
Use your monitor as a soft fill light for Zoom, Teams, and Google Meet with adjustable brightness and color temperature.
Open Tool →Backlight Bleed Test
Check your LCD or OLED monitor for backlight bleeding and IPS glow using a pure black fullscreen display.
Open Tool →Color Gradient Test
Test your monitor for color banding and 8-bit vs 10-bit depth with smooth gradients across grayscale, red, green, blue, and hue channels.
Open Tool →Refresh Rate Test
Measure your display's actual refresh rate with requestAnimationFrame, test motion smoothness, and compare 60/120/144/240 Hz visually.
Open Tool →Resolution Test
Detect your browser's effective resolution and DPR, test 1px grid sharpness, and check geometric accuracy with concentric circles.
Open Tool →Focus Mode
Distraction-free fullscreen with a Pomodoro timer, synthesized ambient sounds, and customizable solid-color background for deep work.
Open Tool →