All Free Screen and Hardware Tests
Every test on TestaScreen runs in your browser, with nothing to install and nothing uploaded. Not sure where to start with a monitor? The complete monitor test walks you through the screen tests in the right order.
Screen tests
Full-screen colors and patterns for checking a monitor, laptop, TV or phone display.
Dead Pixel Test
Cycle full-screen colors to find dead, stuck and hot pixels.
Dead Pixel Fixer
Flash rapidly changing colors over a stuck pixel to try to free it.
White Screen
Pure white full screen for dead pixels, dust and brightness evenness.
Black Screen
Pure black full screen for stuck pixels, bleed and black level.
Color Screen
Red, green, blue or any custom color to check every subpixel.
Backlight Bleed Test
Pure black screen with corner markers to judge bleed and IPS glow.
Response Time Test
A moving pattern to spot ghosting, overshoot and motion blur.
Brightness Test
Gray ladders and gradients to set brightness, contrast and gamma.
Contrast Test
Text contrast against WCAG and a color blindness preview.
Video Call Light
Use a spare screen as a soft fill light for video calls.
Hardware tests
Quick checks for the microphone, keyboard, webcam and mouse, and a checklist for buying a used laptop.
Mic Test
See your input level and record a clip to hear how you sound.
Keyboard Test
Press every key to find ones that don't work or type twice.
Webcam Test
Check the picture, real resolution and frame rate of your camera.
Click Speed Test
Measure clicks per second and catch a mouse that double clicks.
Used Laptop Check
Check a second-hand laptop step by step before you buy it.
Guides & calculators
Step-by-step guides for testing a monitor properly, and a calculator for comparing screens before you buy.
Monitor Test
Every monitor check in the right order, from pixels to ghosting.
Test Before Returning
What to check, and document, before your return window closes.
Monitor Buying Guide
Panel types, resolution, refresh rate and HDR explained.
Pixel Density Calculator
Work out PPI and how sharp a screen looks from your seat.