Trigger Test — Online Free Trigger Tester | Gamepad Tester
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Trigger Test — Online Free Trigger Test

Trigger Tester: PS5, PS4, PS3 & Xbox Controller Testing — Instant, Free & Private

Test every analog trigger on your gaming controller in real time — directly in your browser. Press L2/LT and R2/RT and watch the live bar fill from 0% to 100% instantly. Detect trigger drift, dead zones, sticky springs, and inconsistent actuation — all before they cost you a match.

Live Analog Input L2 / LT R2 / RT PS5 DualSense PS4 DualShock 4 Xbox Series X/S Xbox One Drift Detection
Live Trigger Test
Simulating
L2 / LT
0%
R2 / RT
0%
L2
0%
R2
0%
Connect a real controller to go live
0%
L2 Current
0%
R2 Current
0%
L2 Peak Value
0%
R2 Peak Value
What Is a Trigger Test

What a Trigger Test Checks

A trigger test measures the full analog range of your L2/LT and R2/RT inputs — from completely released (0%) to fully pressed (100%). It confirms smooth linear travel, accurate value reporting, and clean release back to zero.

Why Trigger Health Matters

Analog triggers control acceleration in racing games, aim sensitivity in shooters, and braking in sports titles. A drifting trigger that reads above 0% at rest will cause phantom inputs — your car accelerates alone, your character fires without input.

How the Test Works

Gamepad Tester reads your triggers through the Web Gamepad API at up to 60 frames per second. L2/LT and R2/RT each return a float from 0.0 to 1.0 — our tool converts this to a percentage bar, raw value, and drift status in real time.

Live Trigger Test Demo
Trigger Test — Interactive Demo
Auto Simulation
Analog Triggers — Full Range
L2 — Left Trigger 0%
0%25%50%75%100%
Raw value:0.000
R2 — Right Trigger 0%
0%25%50%75%100%
Raw value:0.000
Shoulder Bumpers
L1 / LB
0.00
R1 / RB
0.00
L3
0.00
R3
0.00
Trigger Drift Monitor
Drift Detection — Resting Value Monitor
L2
0.00
OK
R2
0.00
OK
Input Log
00:00.000—Waiting for input…
Connect a real controller and squeeze any trigger to switch from simulation to live input
How to Test Triggers

How to Use the Trigger Tester

Follow these four steps to run a thorough trigger test on any gamepad in under two minutes.

1

Connect Your Controller

Plug your gamepad in via USB or pair it over Bluetooth. Once your OS recognises the device, open Gamepad Tester and press any button or squeeze any trigger to activate the Web Gamepad API. The trigger bars will go live immediately.

USBBluetoothPress any button
2

Check Resting Values

Before touching the triggers, check that both L2 and R2 read exactly 0% at rest. Any value above 0.02 (2%) at rest indicates trigger drift — the spring tension is weakening or the internal potentiometer is worn. This is the most common trigger fault.

Resting = 0%Drift > 2% = faultDrift monitor
3

Test Full Analog Range

Slowly squeeze L2 from 0% to 100% and back. The bar should fill and empty smoothly without skipping or jumping. If the value jumps erratically from 20% to 80%, the analog sensor inside the trigger is failing. Repeat for R2 on the opposite side.

0% → 100%Smooth travelNo jumps
4

Check Full Press & Release

Press each trigger all the way to the stop — confirm the reading reaches 100% (or very close to it). Then release completely and confirm the value returns cleanly to 0%. A trigger that sticks at 5–10% after release needs cleaning or spring replacement.

100% at full press0% on releaseClean snap-back
Why Choose Gamepad Tester

Why Choose Gamepad Tester for Trigger Testing

Gamepad Tester is the most precise browser-based trigger test available — built for gamers, modders, and repair technicians who need accurate analog readings fast.

Instant — No Install

Open your browser and start testing in seconds. No app, no extension, no account. Gamepad Tester's trigger test works on any device with a modern browser — no waiting, no barriers.

100% Private

Every trigger value is read locally via the Web Gamepad API. No analog data is ever transmitted to any server. Your controller inputs never leave your device — ever.

3-Decimal Raw Values

Most testers show a percentage. Gamepad Tester shows the raw float to 3 decimal places (e.g. 0.847) — essential for calibration, modding, and detecting sub-threshold drift that percentage rounding would hide.

60fps Real-Time Polling

The trigger poll loop runs at up to 60 times per second — matching game engine input rates. You see every value change in the same frame a game engine would see it, not delayed by batch processing.

Drift Detection Built In

The drift monitor watches resting trigger values continuously and flags any reading above 0.02 as a potential fault. Catch failing springs and worn potentiometers before they corrupt your gameplay inputs.

Timestamped Input Log

Every significant trigger change is recorded with a millisecond timestamp. This log makes it easy to catch intermittent faults, inconsistent actuation points, and inputs that spike briefly without consistent pressure.

Trigger Test Compatibility
Controller L2 / LT Analog R2 / RT Analog Trigger Range Drift Detection Connection Notes
PS5 DualSense✓ Full✓ Full0–100%✓ YesUSB-C / BTBest on Chrome / Edge. Adaptive trigger force not exposed via Web API.
PS4 DualShock 4✓ Full✓ Full0–100%✓ YesUSB / BTWidely supported in all modern browsers.
PS3 DualShock 3~ Partial~ Partial~0–100%~ LimitedUSBRequires driver on Windows. Analog values may be inconsistent.
Xbox Series X/S✓ Full✓ Full0–100%✓ YesUSB / BTXInput — best analog trigger support on Windows.
Xbox One✓ Full✓ Full0–100%✓ YesUSB / BTFull analog trigger support via XInput.
Xbox 360✓ Full✓ Full0–100%✓ YesUSB onlyUSB only. Reliable analog trigger readings.
Nintendo Switch Pro✗ Digital✗ Digital0% or 100%N/AUSB / BTNo analog triggers. ZL/ZR are digital buttons only.
Generic USB HID~ Varies~ VariesVaries~ LimitedUSBDepends entirely on device HID mapping.
Frequently Asked Questions

Trigger Test FAQs

How do I test the triggers on my PS5 DualSense?
Connect your DualSense via USB-C cable or Bluetooth, open Gamepad Tester in Chrome or Edge, and squeeze any trigger. The L2 and R2 bars will fill immediately showing a 0–100% reading. Slowly press each trigger from rest to full travel to confirm smooth analog response. Check that both bars return to exactly 0% when you release — any resting value above 2% means your trigger spring is weakening. Note that PS5 adaptive trigger resistance is a hardware feature not exposed via the Web Gamepad API, so force feedback will not be reflected in the tester.
What is trigger drift and how do I detect it?
Trigger drift occurs when a trigger reports a non-zero value at rest — meaning your controller thinks you're pressing the trigger even when you're not touching it. This is caused by worn potentiometer tracks, weakened springs, or debris inside the trigger mechanism. To detect it, connect your controller, leave both triggers completely untouched, and watch the L2 and R2 resting values. Any reading above 0.02 (2%) is drift. The Gamepad Tester drift monitor will flag this automatically with a warning status.
My L2 / LT trigger doesn't reach 100%. Is that normal?
Most triggers reach somewhere between 96% and 100% at full press — this is normal variation between individual controllers. A reading below 90% at full press, however, indicates a hardware fault — either the trigger travel is physically limited by debris, or the internal potentiometer is failing and can no longer reach maximum output. Try pressing the trigger firmly to the stop and wiggling slightly. If it still doesn't reach above 90%, the trigger mechanism likely needs cleaning or replacement.
Can I test Xbox controller triggers on PC?
Yes — Xbox Series X/S, Xbox One, and Xbox 360 controllers have the best analog trigger support on Windows via XInput. Connect via USB or Bluetooth, open Gamepad Tester in Chrome or Edge, and squeeze LT or RT. Both triggers will show a full 0–100% live reading. XInput controllers on Windows typically have more consistent trigger calibration than other platforms, making them ideal for testing trigger range and drift.
Do Nintendo Switch Pro Controller triggers work in this tester?
The Switch Pro Controller's ZL and ZR are digital buttons — they have no analog range. When you press them, the tester will show 0% or 100% with no values in between. This is correct behaviour and does not indicate a fault. The Switch Pro Controller simply does not have analog trigger hardware. If you need analog triggers for PC gaming, a PS4 DualShock 4 or any Xbox controller will provide full 0–100% analog range.
Why does my trigger value jump around instead of moving smoothly?
Erratic, non-linear trigger values — jumping from 20% to 70% without passing through the values in between — indicate a failing analog sensor (potentiometer or Hall effect sensor) inside the trigger. This is a hardware fault that cannot be fixed by cleaning. The potentiometer track is worn through at certain points, causing the voltage reading to skip. The trigger mechanism will need to be replaced. Some controllers use Hall effect sensors instead of carbon-track potentiometers, which are more durable and resistant to this type of failure.
What's the difference between L2/R2 and LT/RT?
L2 and R2 are the names PlayStation uses for the rear analog triggers on DualShock 3, DualShock 4, and DualSense controllers. LT and RT (Left Trigger, Right Trigger) are the equivalent inputs on Xbox controllers. Both refer to the same physical buttons — the two analog pressure-sensitive triggers on the back of a gamepad. In the Web Gamepad API, these are mapped to button indices 6 (left trigger) and 7 (right trigger) regardless of which console's controller you're using.
Is the trigger tester free? Does it need any download?
The trigger tester is completely free and requires no download, no installation, no account, and no email address. It runs entirely in your browser using the Web Gamepad API — a standard browser feature available in Chrome, Edge, Firefox, and Safari. All input processing happens locally on your device and no trigger data is ever transmitted anywhere.
Can I test both triggers at the same time?
Yes — Gamepad Tester reads all controller inputs simultaneously at up to 60 frames per second. You can squeeze L2 and R2 at the same time and both bars will update independently and in real time. This is useful for testing whether pressing one trigger affects the calibration of the other, which can happen with certain controller faults or driver issues on older hardware.

Gamepad Tester — free browser-based trigger testing for PS5, PS4, PS3, Xbox and all standard gamepads. All analog data processed locally. Compatible with Chrome 58+, Edge 79+, Firefox 55+, Safari 16.4+  ·  ← Back to Gamepad Tester