Brightness Test
Check brightness levels, detail retention, and brightness consistency.
Brightness Levels
Change brightness with your monitor or device controls. This page cannot adjust it.
Keys: ← / → switch · F full screen · Esc exit
Choose test mode
Adjust your display brightness and check whether the screen changes smoothly without sudden jumps or obvious flicker.
What do you see?
This test can help you notice visible flicker, but it cannot measure PWM frequency. Camera-based testing or measurement hardware is more appropriate for flicker analysis.
Visual inspection only. It does not measure brightness in nits or physical luminance.
Guide
How to test
01
Set normal viewing conditions
Use your normal room lighting and typical display settings.
02
Start at a lower brightness
Reduce the display brightness and inspect the test field for sudden changes or noticeable flicker.
03
Check brightness levels
Move through low, medium, and high brightness settings and look for smooth changes.
04
Check dark and bright detail
Inspect the near-black and near-white patterns for lost or merged detail.
05
Compare white consistency
Change brightness and watch for noticeable shifts in the appearance of white.
06
Record Observations
Choose the result that best matches what you see.
About
About this test
Visual inspection only
This test helps you observe brightness behavior and tonal detail. A browser cannot measure physical screen luminance or brightness in nits.
What can affect the result
Ambient light, display settings, viewing angle, OS/GPU processing, browser rendering, color management, and the display's own brightness controls can affect what you see.
How it differs
Brightness Test
Brightness behavior and visual detail at different levels.
Greyscale and Uniformity
Shade discrimination and spatial evenness.
HDR Test
HDR capability and HDR-specific visual patterns.
Black Level
Black depth and near-black visibility.
What is Brightness Test?
A Brightness Test displays controlled light and dark patterns so you can visually inspect brightness changes, detail retention, and white consistency. It does not measure physical brightness or luminance.
FAQ
Brightness Test FAQ
01How do I test my monitor brightness?
Use the brightness patterns and compare how the display looks at different brightness settings.
02What brightness should I use on my monitor?
There is no single correct setting. Your room lighting and viewing conditions make a big difference.
03Can this test measure screen brightness in nits?
No. A browser cannot directly measure the physical light output of your display in nits.
04How do I check if my screen is too bright?
Compare the screen with your normal room lighting and check whether bright areas look uncomfortable or lose detail.
05Can this test detect PWM flicker?
It can help you notice visible flicker, but it cannot reliably measure PWM frequency. Camera-based testing or measurement hardware is more appropriate.
06Why does my monitor look brighter or darker in different rooms?
Ambient light changes how your eyes perceive the screen, so the same display setting can look very different in a dark or bright room.