Headphone Test
Check left/right channels, stereo, phase, bass and driver balance of your headphones.
Put on your headphones and run each check below. Every sound is generated in your browser — nothing is downloaded or uploaded.
Left channel
Playing…You should hear this tone in your LEFT ear only.
Right channel
Playing…You should hear this tone in your RIGHT ear only.
Stereo sweep
Playing…The tone should glide smoothly from left to right and back.
Phase check
Playing…In phase should sound centered in your head; out of phase sounds hollow and hard to place. If both sound identical, one driver may be wired out of polarity.
Bass extension
Playing…A sweep from 200 Hz down to 20 Hz. Note where the sound disappears — good headphones stay audible well below 40 Hz.
Driver balance
Playing…A centered tone with a balance slider — it should sit exactly in the middle at 0.
About Headphone Test
The Headphone Test checks every part of your headphones or earbuds in about a minute. It plays dedicated test sounds for the left and right channels, a stereo sweep, an in-phase versus out-of-phase comparison, a bass extension sweep from 200 Hz down to 20 Hz, and a driver balance check with an adjustable slider.
Each check tells you exactly what you should hear, so you can spot a dead driver, swapped left and right channels, a driver wired out of polarity, weak bass response, or an imbalance between the two sides — common questions when testing new headphones or troubleshooting an old pair.
Every sound is generated live in your browser with the Web Audio API. Nothing is downloaded, uploaded, or installed, and the test works with wired headphones, Bluetooth earbuds, and headsets alike.
How to use Headphone Test
- Put on your headphones and set a comfortable, moderate volume.
- Play the left channel test, then the right, and confirm each tone lands in the correct ear.
- Run the stereo sweep and check that the sound glides smoothly from left to right and back.
- Compare the in-phase and out-of-phase tones — in phase should sound centered, out of phase hollow.
- Play the bass sweep and note where the sound disappears; good headphones stay audible below 40 Hz.
- Use the driver balance slider to verify the tone sits exactly in the middle at 0.