Click Start to begin; results render below as the diagnostic runs.
Ready. Click Enable touch listening, then touch or click the pad. Coordinates stay in this tab - nothing is uploaded.
touches: 0 | moves: 0 | maxFingers: 0
Touchscreen Test
Check single and multi-touch contacts on a local test pad in the browser.
Key features
- Enable touch listening arms the pad; the first touch or click on the pad also arms it.
- touchstart, touchmove, and touchend update up to five contact dots and the status text.
- A pointer fallback mirrors contacts for desktop browsers without a touchscreen, so a mouse works too.
- Reset counters clears touches, moves, and maxFingers and hides the dots.
- A status line is visible before your first touch, so you can confirm the pad is ready.
How to run the test
Click Enable touch listening, then touch or click the pad to see contact dots and counters. On a desktop without a touchscreen, click and drag with the mouse - the pointer fallback updates the same readout.
Reading the readout to spot a hardware fault
Because the pad tracks up to five contacts at once and keeps a maxFingers count of the most it saw in a session, it doubles as a check that a phone or tablet digitizer registers every simultaneous finger the panel claims to support. Press five fingers down together and confirm five dots appear; on a laptop with no touchscreen the pointer fallback mirrors the same readout from a mouse or trackpad, so you can rehearse the check before moving to the touch device. Clear the counters between runs to start a fresh count after wiping the glass.
| What you do | What the dots show | What it points to |
|---|---|---|
| Drag one finger slowly across the glass | The dot follows without stalling or skipping | The digitizer tracks that area cleanly |
| Drag over a suspect patch | The dot freezes or jumps | A dead zone or a damaged digitizer trace |
| Lift every finger off the screen | A dot lingers with nothing touching it | A ghost or stuck contact |
Privacy and data handling
Reset counters anytime; nothing is uploaded and no account is required. No camera or microphone permission is requested, and coordinates stay in this browser tab.
Frequently Asked Questions
What does Touchscreen Test check?
Touch and pointer contacts on a local pad - up to five finger dots, move counts, and max fingers seen. Everything stays in the tab.
Do I need to allow camera or microphone access?
No. This tool uses touch and pointer events only - no getUserMedia and no camera or mic permission prompt.
Can I use a mouse on a desktop?
Yes. Click and drag on the pad after Enable - the same readout updates with a pointer fallback so you can verify the page without a touchscreen.
Is my touch input uploaded?
No. Counters and coordinates stay in the page session. Reset clears them; closing the tab drops them.