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Controller diagnostics

Controller Deadzone Tester

Measure analog-stick center drift, jitter, outer range, circularity, trigger travel, and button response locally, then copy or export a diagnostic report.

Local browser processingNo account or uploadExportable results
A game controller beside a live analog-stick deadzone visualization on a dark display
Measure center stability, outer range, circularity, triggers, and buttons.
Live Gamepad API session

Diagnose a controller step by step

Checking browser support…

No controller detected.
Analog diagnostics

Left stick

Raw X
0.000
Raw Y
0.000
Live radius
0.000
Center drift
0.000
Center jitter
0.000
Maximum range
0.000
Minimum edge
—
Coverage
0%
Circularity error
—
Analog diagnostics

Right stick

Raw X
0.000
Raw Y
0.000
Live radius
0.000
Center drift
0.000
Center jitter
0.000
Maximum range
0.000
Minimum edge
—
Coverage
0%
Circularity error
—
Digital and analog inputs

Triggers and buttons

Observed range: — to 0.000
Observed range: — to 0.000
Interpretation

What the browser observed

    This is a diagnostic record, not a universal manufacturer pass/fail test. Games can apply their own deadzones, response curves, smoothing, and platform-specific input layers.

    Portable result

    Copy or export the report

    Connect a controller to generate a report.

    Saved profiles stay in this browser. Exported reports contain controller identifiers and measurements but no account or uploaded data.

    Understand the result

    Controller diagnostic guides

    Use the measurements with the troubleshooting and interpretation guides below instead of judging one number in isolation.

    GuideHow to Test and Fix Controller Stick Drift

    A diagnosis-first workflow for confirming drift, ruling out settings, cleaning safely, recalibrating, and deciding when repair is justified.

    GuideController Deadzone Settings Explained

    Learn how inner and outer deadzones, axial and radial processing, response curves, and anti-deadzone affect control.

    TechnologyController Circularity Error Explained

    Understand what an outer-stick trace measures, why gates are not perfectly circular, and when an uneven path matters.

    TechnologyWired vs Bluetooth Controller Latency

    Separate transport, polling, game-loop, display, and measurement effects before blaming a cable or wireless link.