Refresh Rate Test: Measure Your Monitor Hz Online

You can check your monitor’s refresh rate online using browser-based tools like this refresh rate test. These tools use JavaScript timing (requestAnimationFrame) to estimate how many frames per second your display is actually updating. Just open the tool in your browser and it will automatically detect and display your current refresh rate. This approach is quick, requires no installation, and works on most desktops, laptops, and external monitors. For best accuracy, maximize your browser window and close background apps. Note that browser-based tests may be limited by browser or OS settings, so always compare with your monitor’s advertised specifications.

If your 144Hz monitor is only reporting 60Hz during the test, check your operating system’s display settings first. Windows or macOS may be set to 60Hz by default, especially after a driver update or system restart. Also, confirm you are using a compatible cable, such as DisplayPort 1.2+ or HDMI 2.0/2.1. Some browsers cap animation at 60Hz due to VSync limitations. Try Chrome or Edge, or use the browser in full-screen mode. If the issue persists, update your GPU drivers and double-check that your monitor’s profile is set to the correct refresh rate.

Browser-based refresh rate tests are generally accurate for confirming your monitor’s active refresh rate, but they are not lab-grade precise. They rely on timing browser animation frames, which can be influenced by browser VSync, OS power management, and background processes. Some browsers may cap animation at 60Hz even if your monitor supports higher rates. For most home and office users, these tools are accurate enough to spot misconfigurations or confirm smooth operation. For advanced troubleshooting or overclocking, use dedicated desktop software or hardware-based measurement tools.

Dropped frames and low stability scores usually point to system or browser resource issues. Close unnecessary tabs and background applications to free up CPU and GPU resources. Plug in your laptop to avoid power-saving modes that may throttle performance. Switch to a modern browser like Chrome or Edge, and ensure your drivers are up to date. If you’re using a high-refresh monitor, check that your cable and port support the necessary bandwidth. Also, avoid remote desktop sessions, as they can limit refresh rate detection. Consistent dropped frames may also be a sign of hardware problems or overheating.

A choppy UFO animation means your refresh rate is either unstable, capped, or your system is dropping frames. This may result from browser limitations, background activity, or OS power-saving features. Make sure the browser window is active and maximized. Close other apps that may use the GPU, and check your display settings for the correct refresh rate. Try different browsers if the issue persists, as some handle animation timing better than others. If you’re using adaptive sync (G-Sync or FreeSync), try switching to a fixed refresh rate for the test.

Yes, you can use this refresh rate test on MacBooks and Apple desktop monitors, including the Pro Display XDR. However, macOS sometimes restricts browser-based animation to 60Hz, even if your display supports higher rates. Safari may be more limited than Chrome or Firefox. For MacBook Pro models with ProMotion displays (120Hz), try Chrome or Edge for more accurate detection. Always check your System Preferences to confirm your display is set to the intended refresh rate before testing.

Refresh rate directly impacts gaming smoothness and responsiveness. A higher Hz value means the screen updates more often, reducing motion blur and input lag. Competitive gamers prefer 120Hz, 144Hz, or 240Hz monitors, like the ASUS ROG Swift or BenQ Zowie series, for smoother animation and faster reaction times. However, your GPU must deliver enough frames per second to match the monitor’s refresh rate. Using a tool like this can help confirm you’re getting the refresh rate you paid for, which is crucial for high-performance gaming setups.

For refresh rates above 60Hz, use high-quality cables: DisplayPort 1.2 or higher for PC monitors, or HDMI 2.0/2.1 for TVs and some gaming monitors. Older HDMI cables (1.4) may be limited to 60Hz at 1080p or 4K. Always check your monitor’s specs and your GPU’s outputs. If you’re using a docking station or adapter, confirm it supports the full bandwidth required for your desired Hz. A mismatched or low-quality cable is a common reason for being stuck at 60Hz, even on high-end displays.

Browser-based tests like this one are designed to report your monitor’s fixed refresh rate, not the dynamic range of adaptive sync technologies like G-Sync or FreeSync. While the tool may show fluctuations if your refresh rate is changing rapidly, it won’t confirm proper adaptive sync function. To thoroughly test G-Sync or FreeSync, use dedicated desktop software or manufacturer utilities, and monitor for screen tearing or stutter in real games. Browser tests are still useful for confirming your display’s maximum fixed refresh rate.

Small fluctuations in detected Hz are common due to background processes, browser VSync implementation, or OS-level interrupts. If the stability score remains high and the graph shows minor dips, your system is performing normally. Large, frequent drops may indicate resource contention, background updates, or power-saving features. Try closing unnecessary apps, updating your drivers, and ensuring your browser is up to date. On laptops, plug in the power adapter to avoid throttling. Persistent or large fluctuations might point to hardware problems or cable issues.

To check refresh rate on a multi-monitor setup, open the tool and move the browser window to the display you want to test. The tool will measure the refresh rate of the active display. If you have monitors with different refresh rates (such as a 60Hz office monitor and a 144Hz gaming screen), this test helps confirm which display is currently active for your applications. Make sure your OS settings are configured to run each monitor at its intended refresh rate. For gaming, ensure your primary monitor is set as the main display in Windows or macOS.

No, remote desktop software usually transmits video at a lower or variable frame rate, often capped at 30Hz or 60Hz regardless of your local hardware. Running this refresh rate test over remote desktop will reflect the remote session’s refresh rate, not your physical monitor’s true capabilities. For accurate measurements, always test directly on the target machine and display. If you must check remotely, use desktop software that can report physical display settings, not browser-based animation timing.

Some browsers and operating systems enforce a 60Hz cap on JavaScript animation for compatibility and power-saving reasons. Older versions of Chrome, Firefox, and Safari are especially prone to this. Try updating your browser, using Chrome Canary or Edge Beta, or switching to full-screen mode. On some laptops, power-saving or hybrid graphics modes enforce a 60Hz limit in the browser. Always check your OS display settings and GPU control panel to verify your selected refresh rate. If the cap persists, dedicated software may be needed for deeper diagnostics.

A higher refresh rate benefits all types of computer use, not just gaming. Scrolling, video playback, and even desktop animations appear smoother at 120Hz or above. Creators and professionals who work with video or animation often prefer 120Hz or 144Hz displays for reduced eye strain and more fluid visuals. Office users may notice less flicker and smoother cursor movement. However, for basic tasks, 60Hz is still adequate. This tool helps you verify that you’re using your monitor’s full capabilities, regardless of your workload.

For best accuracy, run the test in a maximized or full-screen browser window. Close other tabs and background applications that use system resources. Plug in your laptop to avoid power-saving throttling. Use modern browsers like Chrome, Edge, or updated Firefox, as older browsers may cap refresh rate at 60Hz. Make sure your OS display settings and cable connections support your desired refresh rate. If using adaptive sync (G-Sync or FreeSync), temporarily switch to a fixed refresh rate for the test. If results still seem off, check for browser updates or try another browser.

This refresh rate test works with nearly any monitor, including gaming models like ASUS ROG Swift PG259QN, BenQ Zowie XL2546K, Alienware AW2521H, Samsung Odyssey G7, LG UltraGear, Dell S2721DGF, and office monitors like Dell U2412M or HP Z24n. It's also compatible with laptop screens from Lenovo Legion, Razer Blade, and MacBook Pro, as well as TVs connected over HDMI. For best results, ensure your monitor and cable support your intended refresh rate, and adjust your system settings as needed.