Frequently Asked Questions
Get answers about our free screen testing tools
General Questions
What tools does Touch-Screen-Test.com offer?
We offer five free tools: Touch Screen Test (test touch accuracy and multi-touch), Dead Zone Test (find unresponsive screen areas), Screen Display Test (check for dead pixels and backlight bleeding), Pixel Fixer (repair stuck pixels), and Refresh Rate Test (measure your display's Hz). All tools work in your browser with no download required.
Are these tools really free?
Yes, 100% free forever. There are no hidden fees, premium versions, or paywalls. We believe essential diagnostic tools should be accessible to everyone, regardless of budget.
Do I need to download an app?
No downloads required. All our tools run directly in your web browser using modern web technologies (JavaScript, Canvas API). This means instant access on any device , just open the page and start testing.
Is my data private?
Absolutely. All tests run 100% client-side in your browser. We never see, store, or transmit any of your touch data, screen information, or device details. Your diagnostics are completely private.
What devices are supported?
Our tools work on virtually any device with a modern web browser: iPhones, Android phones, Samsung Galaxy, iPads, Android tablets, Windows laptops, MacBooks, Chromebooks, desktop monitors, and even smart TVs with built-in browsers.
Device-Specific Questions
How to test touch screen on iPhone?
Open this website in Safari on your iPhone. Our Touch Screen Test works on all iPhone models. For dead zones, use our Dead Zone Test. To check for stuck pixels, use the Screen Display Test. iPhone 13 Pro and newer can also verify their 120Hz ProMotion display with our Refresh Rate Test.
How to test touch screen on Samsung?
While Samsung phones have a built-in test code (*#0*#), our online tools are more comprehensive. Open any of our tests in Chrome or Samsung Internet. Works on all Galaxy models: S-series, A-series, Z Fold, Z Flip. Use the Dead Zone Test after drops or the Pixel Fixer for stuck pixels on AMOLED screens.
How to test touch screen on Android?
Open this website in Chrome or any browser on your Android device. Our tools work on all brands: Google Pixel, Oppo, Vivo, Xiaomi, OnePlus, Huawei, and more. The Touch Screen Test is your starting point for diagnosing any touch responsiveness issues.
Does this work for laptop touch screens?
Yes! Our tests work on any touch-enabled laptop: Windows laptops, Chromebooks, and even MacBooks with external touch displays. Use fullscreen mode for the most accurate results. The Screen Display Test is particularly useful for checking laptop displays for defects.
Can I test my computer monitor?
Absolutely. Open our Screen Display Test to check for dead pixels, stuck pixels, and backlight bleeding on any monitor. Use the Refresh Rate Test to verify you're getting the full Hz your gaming monitor advertises (60Hz, 144Hz, 240Hz, etc.).
Tool-Specific Questions
What is the Dead Zone Test?
The Dead Zone Test displays an interactive grid covering your entire screen. As you drag your finger across squares, they turn green. Any square that stays white indicates a 'dead zone' , an area where your touch digitizer isn't registering input. This is essential after drops, repairs, or when buying used devices.
How does the Pixel Fixer work?
The Pixel Fixer rapidly cycles through RGB colors to stimulate stuck pixels back to normal function. Position the flashing box over the stuck pixel and run for 10-30 minutes. This method works on stuck pixels (colored dots) but may not fix true dead pixels (black dots). It's the same technique used by professional repair technicians.
What does the Screen Display Test check for?
The Screen Display Test cycles through solid colors (white, black, red, green, blue) to reveal: dead pixels (black dots on colored backgrounds), stuck pixels (colored dots on black background), backlight bleeding (light patches on black), and color uniformity issues.
What is the Refresh Rate Test?
The Refresh Rate Test measures how many times per second your display refreshes (measured in Hz). It confirms whether you're getting 60Hz, 90Hz, 120Hz, 144Hz, or higher. Essential for gamers verifying monitor settings and phone users checking ProMotion or high-refresh displays.
Troubleshooting & Common Issues
Why is my touch screen not responding in some areas?
This indicates dead zones, commonly caused by: physical damage from drops (even without visible cracks), water damage corroding digitizer connections, poor-quality screen replacements, or damaged flex cables. Use our Dead Zone Test to map exactly where the unresponsive areas are. Document with screenshots for warranty or repair claims.
What are ghost touches and how do I detect them?
Ghost touches occur when your screen registers touches you didn't make. On our Touch Screen Test, you'll see circles appearing by themselves. This is usually caused by: damaged touch digitizers, water damage, faulty screen protectors, or electrical interference. Ghost touches typically require hardware repair.
Can stuck pixels be fixed?
Yes. This tool provides the same features as a touch screen test app without any installation. It's a quick and private way to test your phone's touch screen.
Why does my refresh rate show lower than expected?
Common causes: 1) Display settings defaulted to 60Hz , check Windows Display Settings or Mac System Preferences. 2) Power saving mode reducing refresh rate. 3) Your HDMI/DisplayPort cable doesn't support higher rates. 4) Variable refresh rate adapting to content. Check our Refresh Rate Test after adjusting settings.
What's the difference between dead pixels and stuck pixels?
Dead pixels don't light up at all , they appear as tiny black dots regardless of what's displayed. Stuck pixels are frozen on one color (red, green, or blue). Use our Screen Display Test with different background colors to identify which type you have. Stuck pixels can often be repaired; dead pixels usually cannot.