Refresh Rate / Hz Test

    Estimate your monitor refresh rate with a visual animation and frame counter

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    Browser refresh rate estimate

    Compare result to your monitor spec (60, 120, 144, 240 Hz). VSync and browser caps may limit the reading.

    Read the complete guide for in-depth tips and troubleshooting.

    What Is a Refresh Rate Test?

    A refresh rate test helps you verify how many times per second your display updates (Hz). Higher refresh rates improve motion clarity in games and scrolling. Our visual animation lets you compare 60Hz vs 144Hz vs 240Hz feel in the browser.

    How to Test Monitor Hz Online

    1. Set your OS refresh rate to the target value first
    2. Open Refresh Rate Test in fullscreen
    3. Watch moving objects for blur and stutter
    4. Repeat after changing display settings
    5. Confirm the control panel reports the same Hz

    Refresh Rate Test Scenarios

    Gaming setup

    Confirm high Hz is actually active

    New monitor

    Validate advertised refresh spec

    Laptop external display

    Check USB-C / HDMI limits

    Esports tuning

    Feel difference before competitive play

    Office monitors

    Explain why 60Hz feels different

    Stream demos

    Show motion clarity to viewers

    Related Tools

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    Frequently Asked Questions

    How does the refresh rate test work?

    The test uses requestAnimationFrame to count how many frames your browser renders per second. After a 1-second sample, it displays an estimated Hz value.

    Why does my result not match my monitor spec?

    Browser tabs, VSync settings, power-saving mode, and multi-monitor setups can cap the frame rate. For best results, use fullscreen on your primary display with other apps minimized.

    What refresh rates can this detect?

    Common rates include 60, 75, 120, 144, 165, and 240 Hz. The estimate rounds to the nearest whole number based on actual frames rendered.

    What is the moving green bar for?

    The animated bar helps you visually spot stutter, tearing, or uneven motion that may indicate a refresh rate mismatch or frame pacing issue.

    Is this refresh rate test free?

    Yes. The Hz test is free and runs entirely in your browser without installing software.