Monitor Hz Test

How to Use Monitor Refresh Rate Test

1. Stay Active: Simply open the page and keep the tab in focus. The browser requires an active window to measure frame timings accurately.
2. Observe the Display: The large number indicates your current frames per second (FPS), which matches your monitor's Hertz (Hz) when V-Sync is active.
3. Check Smoothness: Watch the moving object in the "Smoothness Visualizer." On high Hz monitors (144Hz+), this object will move fluidly with almost no blur.

What Does This Tool Do?

This Monitor Refresh Rate Test is a hardware diagnostic utility designed to verify your screen's performance. Hertz (Hz) refers to how many times per second your monitor can update its image. A 60Hz monitor updates 60 times, while a 144Hz monitor updates 144 times.

This tool identifies whether your operating system and cable (HDMI/DisplayPort) are correctly configured to output the maximum speed supported by your hardware. It helps you catch common configuration errors that lead to "choppy" gameplay or eye strain.

Why Use This Tool?

• 100% Privacy (No Uploads): Your hardware configuration is your business. This tool runs entirely in your local browser memory using JavaScript. No data is sent to a cloud server.
• Detect Configuration Errors: Many users buy 144Hz monitors but accidentally leave them set to 60Hz in Windows settings. This tool catches that mistake instantly.
• Instant Speed: The test starts the moment the page loads, providing real-time feedback with zero processing lag.
• Free & Unlimited: Test as many monitors, laptops, and smartphones as you like without subscriptions or software installation.

Who Is This Tool For?

This utility is a must-have for Gamerswho need to ensure their high-refresh-rate panels are performing at peak levels for competitive play. Graphic Designers and Video Editors use it to verify display fluidity for frame-accurate editing. It is also essential for Hardware Reviewersand IT Professionalswho need to quickly verify equipment specs during setup.

Common Use Cases

• New Monitor Setup: Confirm that your brand-new gaming monitor is actually running at its advertised speed (144Hz, 240Hz, or 360Hz).
• Cable Troubleshooting: Find out if your older HDMI cable is bottlenecking your performance to 30Hz or 60Hz.
• Browser Comparison: Compare how different browsers handle high-refresh-rate rendering and hardware acceleration.
• Mobile Display Check: Verify if your smartphone's "smooth display" or "ProMotion" feature is currently active.

How It Works (Behind the Scenes)

The tool leverages the browser's requestAnimationFrame API. This system is designed to trigger a function every time the browser is ready to paint a new frame to the screen. By measuring the precise time (in milliseconds) between these paint triggers, we can calculate the exact frequency of your monitor. Since this happens locally on your device's GPU and CPU, it is a highly accurate reflection of your real-world performance without needing server-side processing.

Frequently Asked Questions

Is it safe and private?

Yes. Client-side processing ensures your data stays on your machine. We do not track your hardware or log your performance results.

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