Online Monitor Refresh Rate & Ghosting Tester

Accurately measure your monitor refresh rate (Hz), detect frame drops, and inspect display motion clarity with interactive UFO motion benchmarks.

Technical Metrics & Telemetry

Measured Refresh Rate

-- Hz

Frame Interval

-- ms

Dropped Frames

Frame Stability

Calculating...

How to Use This Tool

STEP 1

Launch Test

Open this page and ensure your browser window is active and maximized.

STEP 2

Watch Motion Canvas

Inspect the animated motion bar for smooth transitions without stutter or double-image ghosting.

STEP 3

Confirm Hz Verdict

Verify that the measured refresh rate matches your monitor specification (e.g. 60Hz, 144Hz, 240Hz).

Frequently Asked Questions

Why does my 144Hz or 240Hz monitor only show 60Hz?

Ensure your display refresh rate is configured to 144Hz or higher in your operating system display settings (Windows Settings > System > Display > Advanced display). Also verify your HDMI/DisplayPort cable supports high refresh rates.

What is monitor ghosting?

Ghosting occurs when pixels cannot change colors fast enough to match the refresh rate, leaving a faint trail or shadow behind fast-moving objects.

Does browser hardware acceleration affect Hz accuracy?

Yes. Hardware acceleration allows the browser to synchronize directly with your GPU and monitor via V-Sync for true native refresh rate readings.

Is this refresh rate test 100% client-side?

Yes. All frame delta measurements use requestAnimationFrame and high-resolution performance.now() timers locally on your device with zero server latency.

Is your 144Hz or 240Hz gaming monitor stuck at 60Hz or skipping frames? View 144Hz Monitor Troubleshooting Guide