Screen Test
Test your monitor with full-screen colors, gradients and patterns to spot defects.
Device & Browser Tests
12 free tools
Free online device tests: check your screen for dead pixels, test touch screens, keyboards, mice, microphones, webcams and speakers, and see your browser and screen details.
All 12 device & browser tests
Dead Pixel Test
Find dead or stuck pixels on your screen with full-screen color cycles, and try to fix them.
Touch Screen Test
Test your touch screen for dead zones and multi-touch support by drawing on it.
White Screen
Open a full-screen white page for cleaning your screen, lighting or finding dust.
Black Screen
Open a full-screen black page to check backlight bleed or rest your screen.
Mouse Test
Test mouse buttons, double clicks, scroll wheel and pointer movement.
Keyboard Tester
Press keys to check that every key on your keyboard works, with key codes.
Microphone Test
Test your microphone with a live volume meter and record a playback sample.
Webcam Test
Check that your webcam works, see its resolution and take a snapshot.
Speaker Test
Test your left and right speakers or headphones with tones and a frequency sweep.
What Is My User Agent
See your browser's user agent string and what it says about your browser, OS and device.
What Is My Screen Resolution
See your screen resolution, browser window size, pixel ratio and color depth.
Practical guides
-
How to Use Screen Test
Test your monitor or phone screen with full-screen red, green, blue, white, black and gray, plus gradients, grids and patterns to spot defects.
-
How to Use Dead Pixel Test
Find dead or stuck pixels by cycling full-screen black, white, red, green and blue, then try to revive stuck pixels with a fast-flashing pixel fixer.
-
How to Use Touch Screen Test
Test your touch screen for dead zones and multi-touch support by drawing on it. Touched areas light up and the number of fingers is counted.
-
How to Use White Screen
Open a full-screen white page for cleaning your monitor, lighting video calls, spotting dust and dead pixels, or tracing drawings. Any color works too.
-
How to Use Black Screen
Open a full-screen black page to check backlight bleed and glow, hide what is on screen, or rest your eyes. On OLED screens the pixels switch off.
-
How to Use Mouse Test
Test your mouse online: left, right, middle, back and forward buttons, double clicks, scroll wheel direction, pointer position and movement rate.
Explore other categories
Text Tools
25 tools
HTML Tools
11 tools
Image Tools
24 tools
PDF Tools
20 tools
CSS Tools
19 tools
Coding Tools
18 tools
Color Tools
12 tools
Data Generators
8 tools
Unit & Number Converters
12 tools
Date & Time Tools
15 tools
Math Calculators
27 tools
Health & Body Calculators
21 tools
Everyday Financial Calculators
34 tools
Social Media Tools
12 tools
DNS Tools
14 tools
IP & Network Tools
20 tools
Webmaster & SEO Tools
30 tools
Security & Encoding Tools
16 tools
Device & Browser Tests
12 tools
Productivity Tools
13 tools
Home Calculators
30 tools
Size Charts
12 tools
Research & Academic Tools
27 tools
Medical & Clinical Tools
33 tools