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.

Press L2 and R2 triggers to measure analog response...
No Controller Detected

Left Trigger (L2 / LT)

0.0%
Raw Value 0.0000
Max Reached 0.0%
Linearity Smooth

Right Trigger (R2 / RT)

0.0%
Raw Value 0.0000
Max Reached 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.

What would you like to do next?

Fix Problem

Repair Guide

Step-by-step tutorial to calibrate or repair your controller.

View Repair Guides
Optimize

Game Settings

Get optimal deadzone & sensitivity settings for Apex, COD, Fortnite.

Optimize Settings
Upgrade

Controller Recommendations

Compare replacement controllers with hall-effect anti-drift sticks.

Compare Models

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.

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

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.

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.