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Controller Diagnostic

Trigger Pressure Tester

Test L2 and R2 analog trigger pressure, linearity, and full pull range on PS5 DualSense, Xbox, or Switch controllers. Free, online, no download required.

Analog Trigger Oscilloscope
Awaiting Connection NONE

Left Trigger (L2 / LT)

0.0%
Pressure Waveform
Raw Value 0.0000
Max Peak 0.0%
Linearity Smooth

Right Trigger (R2 / RT)

0.0%
Pressure Waveform
Raw Value 0.0000
Max Peak 0.0%
Linearity Smooth

Trigger Performance Benchmarks

Healthy triggers should rest at exactly 0.0% when untouched and reach 100.0% smoothly when fully pressed. If your trigger caps out below 95%, clean the trigger mechanical housing or adjust trigger deadzone in your game settings.

How to Get Started

Just three steps to run a complete controller test and understand your controller's health status.

01

Connect Controller

Connect your controller to your computer via USB cable or Bluetooth. If the browser doesn't respond, press any button on the controller to activate the connection.

02

Button Detection

Press each button in the visual interface and confirm the corresponding area lights up on screen. This helps troubleshoot unresponsive or double-clicking buttons.

03

Sticks & Vibration

Rotate the sticks to check linearity and drift issues; click the vibration test button to feel if the left and right motor feedback is working properly.

What would you like to do next?

Select a diagnostic calibration suite, deadzone analyzer, or high-frequency overclock tool.

Fix

Repair & Calibration

Calibrate zero-point offsets or follow step-by-step repair guides.

WebHID Calibration
Optimize

Game Deadzones

Calculate exact radial vs axial deadzone overlays for Fortnite, Apex, & COD.

Deadzone Calculator
Telemetry

Overclock & Circularity

Verify true hardware polling Hz stability and statistical circularity grades.

Hz & Circularity Tools

Test complete controller hardware

Combine trigger linearity with stick drift and button matrix diagnostics.

Run Full Wizard

Related Diagnostic Tools

Stick Drift Tester

Test 0.1% stick drift precision.

Button Tester

Test button ghosting and response speed.

Vibration Tester

Test haptic rumble motors.

Polling Rate Checker

Measure input rate in Hz.
Play & Practice

Practice what you just tested

Turn your test results into skill. These arcade games train the exact inputs you just measured — drift, buttons, triggers, D-pad and reaction time.

Browse all games
+150 XP

Trigger Racer

Hold R2/RT in the green zone to chase the speed target.

Play
+125 XP

Asteroid Dash

Dodge asteroids and collect orbs with R2/RT boost.

Play
+150 XP

Kart Drift

High-speed top-down racing. Master the art of the drift in this 3-lap time trial.

Play

Why Analog Trigger Linearity Matters for Gaming

Unlike digital buttons that are either ON or OFF, analog triggers (L2/LT and R2/RT) measure fine pressure levels. In racing games like Forza Horizon or iRacing, feathering the throttle requires 10% to 90% precise trigger control.

Common Analog Trigger Defects

  • Truncated Range: Physical rubber pad degradation stops the trigger at 80-90% max input.
  • Spiking Values: Dirty potentiometer contacts cause jumpy or erratic pressure spikes.
  • Deadzone Lag: Loose trigger springs cause a loose initial deadzone where input is not registered.

Frequently Asked Questions

Everything you need to know about testing your controller.

Why does my controller trigger only reach 85% or 90% full pull?

Worn internal rubber trigger stops or misaligned potentiometer potentiometers prevent the trigger from depressing to 100% capacity. This causes issues in racing games where 100% trigger pull is required for max acceleration.

How does analog trigger pressure testing work?

Using the Web Gamepad API, our tool reads raw float values from 0.0000 (fully released) to 1.0000 (fully depressed) for L2 and R2 triggers, plotting your linearity curve in real time.

Does this test adaptive triggers on PS5 DualSense?

Yes! It measures standard analog travel distance. On PS5 DualSense controllers, disable adaptive trigger haptics in your PC settings for standard linear measurement.

How this test works & its limits
  • This test reads your controller through the browser's standard Gamepad API — no drivers, no installs, nothing leaves your device.
  • Readings depend on connection mode: Bluetooth reports at lower rates than USB. Compare like-for-like (wired vs wired).
  • We measure the input reaching the browser — display lag and game-engine queues are outside this test's view.
  • A clean reading now does not guarantee no drift in-game: deadzones differ per game, and wear develops over time. Use the Drift Timeline to track yours.
  • This is a diagnostic, not a hardware-lab certification. For repair or RMA decisions, confirm with a second run or second tool.
Read the full methodology
100% Client-Side

All Gamepad API data stays in your browser. Zero tracking or data collection.

Instant Results

No downloads, plugins, or software installation needed. Works instantly.

Free Forever

No paywalls, subscription requirements, or hidden usage limits.