Monitor testの使い方
- 1
Prepare the monitor
Let it warm up, use its native resolution, turn off dynamic contrast and eco modes, and dim the room.
- 2
Open the patterns full screen
Press Show patterns full screen or F, then use the arrow keys or 1–7 to move between the seven patterns.
- 3
Adjust each pattern
Use ↑ and ↓ to change the gradient steps, the uniformity grey or the motion speed, and read the hint for what a good result looks like.
- 4
Fix what you can in the monitor's menu
Tune brightness, contrast, sharpness or overdrive while the matching pattern is on screen, then check again.
制限と Pro
Free with no sign-up: seven test patterns, gradients in 16 to 256 steps, three motion speeds and a refresh rate estimate, at any screen resolution.
Pro removes the ads; the monitor test has no paid features. Pro を見る
Monitor test について
Test patterns turn vague impressions about a monitor into things you can check: are dark greys visible, is the backlight even, do moving objects smear? This page draws seven of them on a canvas sized in device pixels, so one pattern pixel is one pixel of your panel, and shows them full screen.
Gradients sweep grey, red, green and blue through all 256 levels of an 8-bit channel, or in 64, 32 or 16 steps for comparison; stripes in the smooth ramp mean banding. The black level chart shows squares from 0 to 20 on black and the white level chart squares from 235 to 255 on white, which reveals crushed shadows or clipped highlights. Uniformity fills the screen with 25, 50 or 75 % grey to expose clouding and dark corners. The sharpness pattern combines a 1-pixel checkerboard, 1-pixel lines and text from 9 to 16 pixels high, and color bars in the style of the broadcast SMPTE chart check color and near-black separation.
The motion test moves a block at 480, 960 or 1920 pixels a second and estimates the refresh rate from the browser's frame timing. Use it to see ghosting, blur and overshoot, and to confirm that a 120 or 144 Hz mode is active; the number reflects what the browser paints, which can be lower than the panel's maximum.
Patterns are shown in standard dynamic range only, and none of them calibrates a display: accurate color needs a colorimeter. Fractional scaling such as 125 % blurs the 1-pixel patterns, so use 100 % or 200 % when judging sharpness.
プライバシー
The test patterns are drawn by the page on a canvas in your browser, and nothing is uploaded or measured remotely. The refresh rate estimate is worked out from frame timing on your device and is neither stored nor sent.
主な機能
Banding gradients
Grey, red, green and blue ramps through all 256 levels, or in 64, 32 or 16 steps.
Black and white levels
Squares 0–20 on black and 235–255 on white for crushed or clipped detail.
Pixel-exact sharpness
A 1-pixel checkerboard, lines and 9–16 px text drawn at device resolution.
Motion and refresh rate
A moving block at three speeds with a measured frames-per-second readout.