All tests
Every test on this site, what it checks, and which one to run first.
Tests
If games or scrolling feel choppy, run the FPS test to see how many frames per second your screen really shows, then the refresh rate test to check the screen runs at the rate you paid for. For a new screen, or one you don’t trust, start with the monitor test: it goes through full-screen patterns for pixels, backlight, contrast and color, and each pattern links to the test for what it finds. If moving objects leave trails, run the ghosting test. To see what a higher frame rate gets you, the frame rate comparisons play several rates side by side, with the frame time each step saves.
There’s nothing to install: every test runs in your browser, and your results stay on your device; the privacy page lists what gets saved. Keep the tab in front while a timing test runs. The pattern tests work best full screen, at your normal brightness, in a dim room.
- FPS test
Frames per second on your screen, dropped frames and 1% lows.
- Refresh rate test
Your screen's Hz to two decimals, and what to change when it shows 60.
- Ghosting test
Moving shapes that show ghosting, overshoot and motion blur.
- Monitor test
13 full-screen patterns: pixels, black level, gamma and uniformity.
- Dead pixel test
Solid full-screen colors that show dead, stuck and hot pixels.
- Burn-in test
Flat gray and color fields that show burn-in and image retention.
- Backlight bleed test
A full black screen that shows light leaking at the edges of an LCD.
- Color banding test
Gray and color gradients, plain and dithered, to spot banding.
- HDR test
What your browser reports about HDR, and brighter-than-white highlights in Chrome and Edge.
- Screen resolution
Your screen's resolution, pixel ratio and scaling, updated as you resize.
- PPI calculator
Pixel density, pixel size and screen size from resolution and diagonal.
- GPU stress test
Load your graphics card or CPU and watch frame rate and frame time.