Brightness 100%
Timer Mode

Set a timer for fullscreen display. Useful for timed screen tests and ambient lighting sessions.

黑色 background

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#000000
Custom Color
Opens one color window per detected screen. Drag & fullscreen each.
Free & Browser-Based

Free Online Screen Savers – No Download Required

Transform your display with beautiful, interactive screensavers that run right in your browser. Choose from digital clocks, productivity timers, ambient animations, and mesmerizing visual effects — perfect for idle screens, desk displays, presentations, and relaxation.

Free Prank Tool

Fake Update Screens – Free Online Prank Tools

Realistic fullscreen prank screens — BSOD, Windows updates, Ubuntu upgrades, iOS updates, and hacker terminals. Launch any screen fullscreen and watch your friends panic. Press ESC to exit anytime.

Screen Testing Tools

Auto Color Cycle

Rapidly cycle through colors to help fix stuck pixels. Run for 20–30 minutes for best results.

OLED Burn-in Test

Display a moving pattern to detect and reduce OLED burn-in artifacts on your screen.

Gradient Smoothness Test

Display smooth gradients to check for color banding and bit-depth issues on your monitor.

Checkerboard Pattern Test

Display pixel-level checkerboard patterns to test monitor sharpness and pixel response.

Pixel Response Time Test

Flash rapid black/white transitions to evaluate pixel response time and ghosting.

Viewing Angle Test

Display color bands to help evaluate your monitor's viewing angle consistency.

Gray Uniformity Test

Display 50% gray to reveal backlight hotspots, clouding, and brightness non-uniformity.

Color Accuracy Checker

Display reference color swatches to compare against known standards for calibration checks.

Multi-Monitor Detection

Detect connected displays and open fullscreen color on all screens simultaneously.

Drag each window to a different monitor, then click Go Fullscreen inside it.
Detected Screens
Click "Refresh" to detect…

About 黑色

<p>黑色屏幕工具将整个屏幕填充为纯黑色。它适用于OLED屏幕的像素烧屏测试、IPS漏光检测和创建暗室环境等多种用途。</p><p>OLED和AMOLED屏幕在黑色背景下显示真正的黑色,因为像素完全关闭。这一特性使黑色屏幕成为检测常亮像素和背光问题的完美测试工具。</p><p>IPS显示器中漏光是常见问题。在黑暗的房间中打开黑色屏幕,检查屏幕边角是否有光线渗透。购买新显示器时进行此测试非常重要。</p><p>黑色屏幕还能节省能源,特别是在OLED屏幕上,因为像素关闭不消耗电力。在演示切换间隙或需要保持屏幕活跃但不需要显示内容时也很有用。</p>

Frequently Asked Questions – 黑色

关闭室内灯光,启用全屏黑色,检查屏幕边缘。漏光表现为边角或边缘的明亮区域。

是的,OLED屏幕上黑色像素完全关闭,这显著降低了能耗。

可以,将屏幕设为全黑可以最大限度减少房间内的光污染。在需要黑暗环境的情况下很有用。

常亮像素是持续发亮的像素。在黑色背景上它们显示为小亮点,很容易被发现。

OLED屏幕通过完全关闭像素产生真正的黑色。LCD屏幕通过阻挡背光产生黑色,因此可能看起来接近深灰色。