The Diagnostic Suite

Every test. One place.

GPADLAB offers 25 free, browser-based diagnostic tools for testing controllers, gamepads, and peripherals. Detect stick drift, measure input latency in milliseconds, check button response, verify polling rate, and run a full Controller Health Score benchmark — no download, no account, instant results.

25 of 25 tools

Button Test

Check every button responds instantly

Stick Drift Test

Detect unwanted analog input at rest

Deadzone Test

Measure your stick’s deadzone radius

Vibration Test

Test both rumble motors independently

Trigger Pressure

Verify full analog range on triggers

Latency Test

Measure input lag in milliseconds

Connection Stability

Detect dropouts and signal interruptions

Mapping Tool

Remap buttons for accessibility or comfort

Gamepad Viewer

Stream-friendly controller input overlay

FPS Test

Benchmark your display’s frame rate

Mic Test

Test controller and headset microphones

Polling Rate

Measure inputs reported per second

Circularity Test

Visualize stick travel as a circle

Snapback Test

Measure how fast sticks return to center

Hall Effect Checker

Identify Hall Effect vs potentiometer sticks

Gyro Test

Test 6-axis motion sensors

Touchpad Test

Test DualSense and DualShock touchpads

Adaptive Trigger

Test DualSense adaptive trigger resistance

Keyboard Test

Test every key on your keyboard

Mouse Test

Test mouse buttons, DPI, and tracking

Refresh Rate

Measure your monitor’s actual refresh rate

Audio Latency

Measure end-to-end audio delay

Macro Detector

Detect automated input patterns

Benchmark

Composite 0–1000 Controller Health Score

Battery Health

Estimate wireless controller battery life

How We Test

Measured against real hardware

Every test on GPADLAB is built on the Gamepad API and validated against physical measurement rigs. Our methodology is open and documented — read exactly how each metric is captured, what thresholds we use, and why they matter.

Read the methodology
Frequently Asked

Common questions

Every test runs entirely in your browser using the Gamepad API, Web Bluetooth, and Web Audio APIs. Your controller data never leaves your device — there is no upload, no account, and no tracking of your input.

The composite score

Or run them all at once with the full benchmark

Six core diagnostics, one composite score from 0 to 1000, one letter grade. The definitive Controller Health Score.

Run the Benchmark