Screen Tests
Screen tests are fullscreen patterns and measurements that show how well your display works. Run them to find dead pixels, measure the real refresh rate in Hz, spot ghosting, backlight bleed and burn-in, check a touchscreen for dead zones and judge color, all in your browser with nothing to install.
Dead Pixel Test
Cycle full-screen solid colors to inspect your display for dead, stuck or hot pixels by eye.
Screen Uniformity Test
Even gray fields with an optional grid overlay to reveal clouding, vignetting and backlight bleed.
Monitor Test
A full set of monitor test patterns: gradients, grids, gamma, sharpness, checkerboards and color bars.
OLED Gray Test
Near-black gray steps that expose OLED banding, near-black flicker and uneven low-light uniformity.
OLED Burn-In Test
Solid color fields and an auto-cycle mode to help you see image retention and burn-in on OLED panels.
Screen Burn-In Test
Check any LCD, OLED or plasma screen for burn-in and image retention, then run a white-sweep or color fixer to clear it.
Touch Screen Test
Find dead zones and test multi-touch: fill a grid with your finger, draw freely, or see every touch point live.
Screen Refresh Rate Test
Measure your display's refresh rate in Hz live in the browser, with frame times, late frames and a motion check.
Monitor Ghosting Test
Moving targets on dark, mid-gray and light backgrounds reveal ghosting, smearing and overshoot on your monitor.
Frame Rate Test
Compare 15, 24, 30, 60 FPS and your display's maximum side by side to see how frame rate changes motion.
Screen Color Test
Color bars, RGB ramps and saturation steps for checking color accuracy, banding and tint.
Screen Resolution Test
See your screen resolution, viewport size, pixel ratio and color depth, plus a 1-pixel sharpness pattern.
Which test should I run first?
On a new or second-hand display, start with the dead pixel test and the uniformity test: they catch the faults most often covered by a return or warranty. Gamers should add the refresh rate and ghosting tests; phone and tablet owners the touch screen test; OLED owners the burn-in tests.
How accurate are browser tests?
Patterns are drawn with exact pixel values and timing comes from the browser’s frame clock, so results match what your screen really shows. They do not replace a hardware colorimeter for professional calibration.
Screen Tests FAQ
How do I test my monitor for problems?
Clean the screen, then run the dead pixel test, the uniformity test in a dark room, and the refresh rate test. Together they take about five minutes.
Do these tests work on TVs and phones?
Yes. Open the page in the device’s browser and go fullscreen. The touch screen test is made for phones and tablets.
Are the screen tests free?
Yes. Every test is free, needs no sign-up and runs entirely on your device.