240Hz Test
Verify your monitor is running at its full 240Hz refresh rate. Confirm your display, cable, and GPU support 240Hz output.
This test uses requestAnimationFrame timing to estimate your display's refresh rate. Close other tabs and apps for the most accurate result. Browser throttling or V-Sync may affect the reading.
How does this test work?
A 240Hz test estimates your display refresh rate using frame timing. If it shows ~240 FPS, your monitor is correctly set to 240Hz. Results below 240 indicate a configuration or cable issue.
How to use the 240Hz Test
Open the 240Hz Test on any device with a modern browser — desktop, laptop, tablet, or phone. No downloads, plugins, or signup required. The tool loads instantly and works in Chrome, Firefox, Safari, Edge, and other Chromium-based browsers.
Follow the on-screen instructions to run the test. Results are displayed immediately in your browser. You can repeat the test as many times as needed. For the most accurate results, close other tabs and applications to reduce interference.
Privacy: This test runs entirely in your browser using standard web APIs. No data is collected, uploaded, or stored on any server. Camera, microphone, keyboard, mouse, and controller inputs are processed locally and never leave your device. DeviceKit does not use analytics cookies or tracking scripts.
Browser note: Some hardware values are estimated because browsers limit direct access to device hardware for security and privacy reasons. Results may vary slightly between browsers and operating systems. For the most reliable measurements, use an up-to-date version of Chrome or Edge on a desktop computer.
Frequently Asked Questions
What cable do I need for 240Hz?+
For 1080p 240Hz, use DisplayPort 1.2+ or HDMI 2.0+. For 1440p 240Hz, use DisplayPort 1.4 or HDMI 2.1. Check your monitor's supported inputs.
Related Tests
Refresh Rate Test
Measure your display's refresh rate in Hz using your browser. Check if your monitor is running at 60Hz, 120Hz, 144Hz, 240Hz, or higher.
144Hz Test
Verify your monitor is actually running at 144Hz. Test if your refresh rate is correctly set and your display is using its full speed.
Motion Blur Test
Test your display for motion blur with moving stripe patterns. Check if fast motion appears sharp or blurry.