What this Xbox test shows
The diagram is drawn after the Xbox Series X|S controller, which shares its layout with the Xbox One controller. The browser reads the controller about 60 times per second through the Gamepad API and the drawing follows it:
- A, B, X, Y, View, Menu, Share and the Xbox button turn orange while pressed. The Share button only appears in browsers that report it (button 17).
- LB and RB light up along the shoulders.
- LT and RT fill from the bottom as you pull them, from 0.00 to 1.00.
- Both sticks move inside their wells, and a short line shows the direction and how far they lean. Pressing a stick (LS, RS) fills its cap.
Below the diagram, the stick plots and the raw values give the precise numbers.
Reading the result on an Xbox controller
| What you see | What it means |
|---|---|
| LT or RT stops below 0.95 | Worn trigger or dust under it. Most games treat 0.90 as a full pull, so you may not notice yet. |
| LT or RT rests above 0.05 | The trigger spring is tired or the trigger is rubbing. It can fire a shot by itself in some games. |
| LB or RB lights only at one end | Bumper switch worn or misaligned, a known Series controller issue. |
| A stick moves at rest | Stick drift. Run the stick drift test for a verdict and a deadzone value. |
| Inputs freeze for a second | Bluetooth dropout, usually from low batteries or a USB 3 port next to the receiver. |
Batteries, Bluetooth or adapter
The controller runs on two AA batteries or a rechargeable pack. With weak cells it stays on but loses its link first when it vibrates, which looks like a hardware fault. Test with fresh batteries or plugged in before drawing conclusions.
Bluetooth and the Xbox Wireless Adapter send the same inputs, but the adapter usually has a steadier link on Windows. If the test stutters over Bluetooth and not over USB, the controller is fine: move the PC’s Bluetooth receiver away from USB 3 ports, or use the adapter.
Update the controller firmware in the Xbox Accessories app if a button behaves differently over USB and wireless: older firmware had Bluetooth bugs that a cable hides.
Limits of a browser test
The page reads what Windows, macOS or Android pass to the browser. It cannot see the Elite paddles as separate buttons, the profile button, the battery level or the force of the impulse triggers. The diagram follows the standard Xbox layout; if you connect another controller, a note tells you what was detected and the inputs stay correct. For a generic layout, use the controller tester, and to check the rumble motors, use the vibration test.
Frequently asked questions
Does it work with the Xbox Wireless Adapter?
Yes. On Windows the adapter, Bluetooth and USB all show up in the browser. Over Bluetooth the controller needs the 2016 or later model (the plastic around the Xbox button is part of the face, not of the top), which includes every Series X|S controller.
My bumper only works when I press it hard. Is it broken?
That is the most common Xbox Series controller fault. Press the bumper at its outer end, then near the centre of the controller. If the diagram only lights up at one end, the contact under the bumper is worn or the switch is misaligned. A firmware update will not fix it; a repair or a warranty claim will.
Can I test the impulse triggers?
The trigger rumble motors can be driven by Chrome and Edge on some systems. The vibration test page shows a Trigger motors button only when your browser reports them. Their force feedback in games cannot be measured here.
Are the back paddles of the Elite controller shown?
Not as paddles. The Elite Series 2 sends them as copies of other buttons (A, B, X, Y by default), so the diagram lights the button they are mapped to. Remap them in the Xbox Accessories app to check each one.
The controller keeps disconnecting during the test. Why?
Low batteries come first. The Xbox controller still turns on with almost empty AA cells but drops Bluetooth under load, especially when it vibrates. Try fresh batteries or a USB-C cable before blaming the radio.
Updated October 26, 2026