Handy tools
Monitor Test
Dead pixels, refresh rate (Hz) and ghosting — test your screen in the browser, no install.
Check your monitor in seconds — hunt for dead or stuck pixels with full-screen color fills, estimate your refresh rate, and spot ghosting or motion blur. No install, runs right in the browser.
Tip: run it in full screen at 100% zoom with the lights dimmed. The refresh-rate figure is an estimate — a browser can't measure faster than your display actually refreshes, and background tabs are throttled.
Free online monitor test to check your screen in seconds. Run a dead pixel test with full-screen color fills to catch stuck or dead pixels, measure your display's refresh rate in Hz, and spot ghosting or motion blur with a moving-block test. Everything runs right in the browser — no download, no install, works on any laptop, PC or external monitor. Perfect before buying a used display or checking a brand-new one.