Touch Screen Test
Free online touchscreen tester for iPhone, Android, iPad, and touchscreen laptops. Tap or swipe across the canvas to check every part of your screen for dead zones and unresponsive areas. Use multiple fingers at the same time to test multitouch support. No app download, no signup, works in any mobile or desktop browser.
Tap every corner and edge to check for dead zones
How to run a touch screen test on any device
Open this page on the device you want to test and tap or drag your finger across the canvas. Every touch registers as a colored dot. For a complete screen touch testing session, work systematically in a grid rather than tapping randomly. Start at the top-left corner, move row by row across to the right edge, then drop down and repeat until you reach the bottom-right corner. The corners and the bottom edge near the home indicator are the areas most likely to develop dead zones from everyday use.
After mapping the full surface, pay attention to any areas that produced no dot. Tap those spots several times to confirm they are consistently unresponsive rather than just missed by your finger. A spot that fails to register on every attempt is a confirmed dead zone. The touchscreen tester shows the total tap count and the highest number of simultaneous contacts detected, giving you a complete picture of your screen health in one session.
Touch screen test for iPhone and iPad
To run the touch screen test for iPhone, open this page in Safari and tap across the full canvas. No app is required. This works on all iPhone models including iPhone 15, 14, 13, 12, SE, and older models. The tool is also a reliable iPad touch screen test. Just open it in Safari on your iPad and use the full canvas. If certain areas of your iPhone or iPad touch screen are not responding, note which corners or edges fail in this test before visiting Apple Support or a repair shop. The dot map makes it easy to show a technician exactly where the dead zones are.
If you want to check the iPhone touch screen using Apple's built-in method, go to Settings, tap General, tap Shut Down, then press Cancel without shutting down. Some iPhone models display a touch grid diagnostic from this path. On older iPhones, dialing *#*#2664#*#* sometimes opens a native touch test depending on carrier and iOS version. When those built-in options are not available, this browser-based touchscreen test for iPhone is the fastest alternative that requires nothing to install.
Android touch screen test
Open this page in Chrome on your Android phone or tablet to run the Android screen touch test. It works across all Android manufacturers including Samsung, Google Pixel, OnePlus, Xiaomi, and Motorola. Many Samsung devices have a built-in touchscreen test accessible by dialing *#*#2664#*#* or entering the service menu via *#0*# in the phone dialer. On Google Pixel devices, the built-in touch test is not exposed, making this browser-based Android screen touch test the easiest option without installing a dedicated app.
For Android tablets, open the page in Chrome or Samsung Internet and use both hands to test multitouch. Android tablets typically support 5 to 10 simultaneous touch points. If the Android touch screen is not responding after a software update, try clearing the cache partition from recovery mode before assuming hardware failure. A full factory reset also resolves digitizer driver issues caused by corrupted system files. Use this touchscreen tester both before and after a reset to confirm whether the issue is hardware or software.
Touch screen not working: causes and fixes
If your touch screen is not working or the phone screen touch is not responding, the most common causes are: physical digitizer damage from a drop or pressure, moisture inside the display assembly, an incompatible or lifted screen protector, or a software crash on a touchscreen laptop. Start with these steps before assuming the hardware is broken. First, restart the device. Many cases where the touch screen does not work resolve after a reboot. If the phone screen touch randomly stops working and restarts fix it temporarily, a background app or accessibility service may be interfering with touch input.
If the touch screen on a cell phone is not working only while the phone is plugged in to charge, the charger is likely causing electrical interference on the digitizer. Try a different charger or cable to confirm. This is one of the most frequently overlooked causes of an unresponsive touch screen on Android phones. On touchscreen laptops running Windows, go to Device Manager, expand Human Interface Devices, and look for the HID-compliant touch screen entry. Right-click and select Enable Device if it is disabled, or uninstall and reinstall the driver. For persistent hardware dead zones confirmed by this touch screen test, the digitizer assembly typically needs professional replacement.
How this touchscreen testing tool works
This touchscreen tester uses the browser Pointer Events API, which handles touch, mouse, and stylus input through a single unified interface. Each contact point gets a unique pointer ID that persists for the duration of that touch, so multiple simultaneous fingers are tracked independently and shown in different colors. The canvas sets touch-action: none to prevent the browser from intercepting touch events for scrolling or zooming before they reach the test.
The canvas renders at the device's native pixel density using window.devicePixelRatio so dots appear sharp on Retina and high-DPI displays and land at the exact physical pixel you touched. The canvas also re-measures on window resize and device rotation so coordinates stay accurate after you rotate your phone or resize the window. Compare results with the dead pixel test if you want to check both the digitizer and the display panel in the same session.
Frequently asked questions
Open this page on your device and tap or swipe across every part of the canvas above. Each touch registers as a colored dot. If a specific area of the screen produces no dot when you tap it, that area is unresponsive and likely has a digitizer dead zone. For a thorough screen touch testing session, work in a grid pattern from corner to corner, then test each edge individually. The corners and bottom edge are the most common locations for dead zones on phones and tablets.
Open this touch screen test in Safari on your iPhone and tap across the canvas. It works as a touch screen test for iPhone without any app download. Tap all four corners, both long edges, and the center. The tool counts every tap and shows the total. If some areas do not register, your iPhone touch screen may have digitizer damage. You can also run the built-in iPhone diagnostics by going to Settings, General, Shut Down, then pressing Cancel. On some iPhone models, going to Settings and tapping 20 times on the version number opens a hidden touch grid test.
Open this page in Chrome on your Android device to run a free Android screen touch test. Tap and draw across the full canvas to find any dead spots. Many Android phones also have a built-in touchscreen test: dial *#*#2664#*#* in the phone app (Samsung), or *#*#0#*#* on some models. If you cannot open the dialer code, this browser-based touchscreen tester works on all Android browsers including Chrome, Firefox, and Samsung Internet without any installation.
A touch screen that does not work or is not responding to touch usually has one of these causes: physical digitizer damage from a drop or impact, moisture or condensation inside the display assembly, a screen protector that is lifted or not compatible with the panel, or a software driver crash on a laptop. On phones, restart the device first. Many touch screen issues resolve after a reboot. If the phone screen touch stops working only while charging, try a different charger, as low-quality chargers create electrical interference on the digitizer layer.
If your iPhone touch screen is not working in specific spots but works elsewhere, the digitizer layer likely has localized damage. This commonly happens after a drop where the glass did not visibly crack but the internal digitizer trace broke. Water damage is another cause, even on water-resistant models. Use this touch screen test for iPhone to map exactly which areas are unresponsive before visiting an Apple Store or repair shop, so you can show the technician the exact dead zones. If the whole iPhone screen is unresponsive, try a force restart by pressing Volume Up, Volume Down, then holding Side until the Apple logo appears.
A dead zone is an area of the touchscreen that does not register touch input. Dead zones appear when the digitizer layer, the transparent sensing grid that sits above the display, is damaged or disconnected in that region. The glass surface may look completely normal. Dead zones are most common in corners, along the bottom edge near the home button area, and wherever the screen has experienced repeated flex stress. This touchscreen tester visualizes dead zones by showing you which areas produce no dot when tapped.
Multitouch means the screen can track more than one finger at the same time. Most modern smartphones support 5 to 10 simultaneous touch points. To test multitouch, place multiple fingers on the canvas at the same time and watch the Max Simultaneous counter increase. Pinch-to-zoom requires at least 2 touch points. Full keyboard input requires 5 or more. If your screen only registers one finger at a time even when you place two down, the touch controller may have a firmware bug or the digitizer may be partially faulty.
Yes. This touch screen testing tool works entirely in your mobile browser with no app download, no account, and no installation. Open toolcenterhub.com/developer/touchscreen-test in Safari on iPhone or Chrome on Android and start tapping. It uses the browser Pointer Events API to detect all touch points. The canvas resizes to your screen and works at native pixel density so the dot placement is accurate. It is free to use as many times as you need.