Contrast Test
Test your display contrast with near-black and near-white steps. Check if your monitor clips shadow or highlight detail.
Near-black (shadow detail)
Near-white (highlight detail)
You should see distinct steps in both rows. If near-black squares look identical, your display clips shadow detail. If near-white squares merge, highlights are clipped.
How does this test work?
A contrast test shows subtle near-black and near-white steps. If you cannot distinguish the darkest or lightest squares, your display is clipping shadow or highlight detail.
How to use the Contrast Test
Open the Contrast 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
Why can I not see the darkest squares?+
Your display brightness may be too low, or your contrast/gamma settings are crushing blacks. Try increasing brightness or adjusting gamma to 2.2.
Related Tests
Gamma Test
Test your monitor gamma calibration with a grayscale step chart. Check if your display shows accurate brightness levels.
HDR Test
Check if your display supports HDR (High Dynamic Range) and its color gamut. Test shadow and highlight detail.
Backlight Bleed Test
Use a fullscreen black screen to check your monitor, laptop, or TV for backlight bleed, edge glow, clouding, and screen uniformity issues.