Detect swapped left and right channels before important calls or recordings
Browser headphone diagnostics • Left/right channel check • Stereo balance test • 100% local
Headphone Test
Free online headphone tester — verify left/right channel balance, stereo playback, and audio output. Works with wired headphones, Bluetooth earbuds, and headsets.
What this online headphone test does
This free online headphone test helps you verify that your headphones are connected correctly and that the left, right, and stereo channels play as expected. It plays test tones through each channel so you can check for swapped channels, imbalanced audio, and overall playback clarity. Whether you are preparing for an important video call, editing audio, or just want to confirm your new headphones work properly, this tool gives you instant feedback without installing any software.
How to test your headphones step by step
- 1.Open this headphone test page in Chrome, Firefox, Edge, or Safari — no installation required
- 2.Set a comfortable playback volume before starting the test
- 3.Play the left channel test and confirm you hear sound only in your left ear
- 4.Play the right channel test and confirm you hear sound only in your right ear
- 5.Play the stereo test to confirm both sides sound balanced and clear
Why use this free headphone checker
Check whether both earcups or earbuds are active and equally loud
Works with wired headphones, Bluetooth earbuds, gaming headsets, and USB audio devices
Adjustable frequency slider lets you test across bass, mid, and treble ranges
No software installation, no account sign-up — runs entirely in your browser
Instant results — know in seconds whether your headphones are working correctly
Headphone test FAQ
What should I hear during the headphone channel test?
During the left channel test you should only hear sound in the left ear, during the right channel test only in the right ear, and during the stereo test you should hear both sides evenly with balanced volume.
Can this test detect swapped audio channels?
Yes. If the left test plays in the right ear or the right test plays in the left ear, your audio channels are likely reversed somewhere in the signal path — in the cable, adapter, driver settings, or Bluetooth codec.
Does the headphone test work with earbuds and gaming headsets?
Yes. The same channel checks work for wired earbuds, Bluetooth earbuds, gaming headsets with microphones, USB-C headphones, and standard over-ear headphones.
Why is the frequency slider important for headphone testing?
Different frequency ranges test different parts of the headphone driver. Low frequencies (bass) reveal driver looseness, mid frequencies test voice clarity, and high frequencies (treble) expose harshness or distortion.
Is this headphone test safe for my hearing?
The test starts at a moderate volume. Always begin with a comfortable level and increase gradually. The tool does not auto-amplify beyond system volume settings.