Nine Preset Intensities
From a 10ms light tap to a full one-second rumble, run the motor through short and long bursts to spot where it weakens.
Vibration / Haptic Test
Trigger your phone's vibration motor at different intensities and patterns to feel whether it's working, weak, or stuck. Best on Android — see the note below for iPhone.
Checking support…
Vibration API not available in this browser. This is expected on iPhone — Safari does not support web-triggered vibration. Try this test in Chrome or Samsung Internet on an Android device.
200ms
Did you feel that vibration?
Why It Matters
Feel Your Vibration Motor at Every Intensity
A single default buzz won't reveal a motor that's weak, uneven, or only fails on longer patterns. This test runs the full range.
Pattern & Rhythm Testing
Double pulses, a heartbeat rhythm, and a full SOS pattern check that the motor can start and stop cleanly, not just hold one buzz.
Custom Duration Slider
Dial in any duration from 10ms to 2 seconds to reproduce exactly the buzz length a specific app or notification uses.
Human-Confirmed Results
After each buzz, you confirm whether you actually felt it — combining the software signal with the physical check no browser API alone can do.
Live Waveform Visual
A bar visualization shows exactly when the motor is on and off for each pattern, so you can match what you feel to what was sent.
100% Private, No Install
Everything runs through the browser's standard Vibration API — no app, no permission prompt, and nothing is recorded or sent anywhere.
The Process
How to Run a Full Motor Check
Work through the presets from weakest to strongest for the clearest picture.
Hold Your Phone
Hold the phone in your hand rather than resting it on a soft surface — a couch cushion or carpet will muffle a working motor.
Tap a Pattern
Start with Light Tap, then work up to Strong Buzz. Each button fires that exact pattern immediately.
Confirm What You Felt
Answer "Yes" or "No" after each buzz — this builds an accurate tally of which intensities the motor can still produce.
Review the Tally
Check the sidebar for how many patterns were confirmed felt out of ten — a low count points to a weakening motor.
Use Cases
Who Needs a Vibration Test?
Anyone who relies on their phone buzzing reliably — or who wants proof before a return or repair.
Used Phone Buyers
Verify before you pay
Confirm the motor still buzzes at all intensities
Listen and feel for a rattling, worn motor
Test before a return window closes
Accessibility Users
Depend on haptic alerts
Confirm silent-mode alerts will still be felt
Check the motor before a critical event
Compare intensity across two devices
App Developers
Preview haptic timing
Prototype a notification's buzz length
Test multi-pulse patterns cross-device
Confirm the Vibration API is available
Troubleshooting
Nothing Happened When You Tapped a Button?
Here's how to tell a browser limitation from an actual hardware problem.
iPhone Shows "Not Supported"
Expected. Safari on iOS has no web Vibration API, so this reflects a browser limitation, not a broken Taptic Engine. Test native app haptics instead.
API Supported But No Buzz
Check your phone's system vibration setting isn't fully disabled, and that battery saver mode — which sometimes limits haptics — is off, then retry.
Weak or Inconsistent Buzz
A thick case, a soft surface, or a worn motor can all mute vibration. Remove the case, hold the phone in hand, and compare Light Tap to Strong Buzz.
Single Buzz Works, Pattern Doesn't
If simple buzzes work but multi-pulse patterns feel like one long buzz, the motor is fine — some Android skins simplify complex patterns by design.
FAQ
Vibration Test — Common Questions
What to expect, and what iPhone users should know before testing.
Apple has never implemented the web Vibration API in Safari on iOS, for battery and privacy reasons. This is a deliberate browser restriction, not a bug in this tool or a sign your Taptic Engine is broken — the motor itself only responds to native app and system haptics on iPhone, which a website cannot trigger.
Browsers only allow the Vibration API to run in direct response to a user action like a tap or click. This prevents websites from silently buzzing your phone in the background, so every pattern here requires you to press its button.
Not fully. The browser can only confirm it successfully sent a vibration command — it cannot sense whether the motor physically moved. That's why this tool asks you to confirm "did you feel that?" after each pattern, combining the technical check with your own physical confirmation.
On most Android phones, silent mode and Do Not Disturb only mute sound and notifications — vibration triggered directly by an app or website will usually still fire. If nothing happens at all, check your system vibration settings rather than assuming the motor is broken.
A thick case, the phone resting on a soft surface, low battery combined with battery saver mode, or a worn vibration motor can all make vibration feel weaker than normal. Try the test again on a hard surface with the case removed and battery saver off.
Yes. It uses the standard, built-in web Vibration API supported by Chrome, Firefox, Samsung Internet, and other Android browsers. No special permission or install is required, and nothing is sent to a server.