Browser-observed response threshold
Controller deadzone test: see when your browser first receives stick movement.
Start the Input Threshold Test, then move the stick very slowly away from center. The tool records the first browser-observed movement above a 2% reference threshold.
This is not a direct measurement of the controller’s built-in hardware or firmware deadzone. It reports when browser-observed stick magnitude first exceeds the tool’s 2% reference threshold during this session.
Connect a controller and press any buttonThe browser will list controllers it can expose through the Gamepad API.
navigator.getGamepads(). Try a current desktop browser with Gamepad API support.Live input
Buttons
Analog input
Triggers
Left Trigger
Right Trigger
Analog position
Sticks
Left stick
Right stick
Session measurements
Stick diagnostics
MeasurementLeft stickRight stick
Center deviationCurrent radial magnitude
Observed rangeMaximum radial value in this session
CircularityRadial spread from perimeter samples
Input Threshold TestFirst observed movement above a 2% reference thresholdThis does not directly measure a controller’s built-in hardware or firmware deadzone.
Uninterpreted values
Raw input
Raw Input keeps the browser's original button and axis indices. Known controller labels appear only in the interpreted view above.
Browser metadata
Controller information
Results reflect input values exposed by your browser and operating system and may differ from raw hardware measurements. Session measurements describe only the values observed while you run them; they do not diagnose hardware failure.
What does the 2% threshold mean?
It is a fixed reference used by this site to make repeated browser-observed tests easier to compare. It is not a manufacturer specification.
How should I run the test?
Release the stick at center, press Start, then move the stick slowly in one direction. Reset and repeat if you moved too quickly.
Why can a game feel different?
A game may apply its own deadzone, response curve, or input processing after the browser or operating system layer. The result on this page therefore does not predict an exact in-game deadzone.