How do I test left and right earbuds online?
Connect the earbuds, set them as the output device, start the Left test, then the Right test. Each side should play alone at similar loudness.
Test My Speaker
Headphone Left-Right Test Online
Verify left and right earcups on wired or Bluetooth headphones. Free, private, browser-only—perfect for mobile and desktop.
Start headphone testFree · No mic · Works on mobile
Speaker test console
Generated locally with the Web Audio API
Signal
Idle
Lower your system volume before starting. Stop immediately if the sound feels uncomfortable.
1Lower system volume
2Choose a channel or mode
3Listen and confirm
Speaker channels
440 Hz440Hz
IdleTest modes
What to listen for
Choose a channel or test mode. A clear, steady signal should match the control you selected.
Did you hear it?
Your response is informational only; the site does not diagnose speaker hardware.
How to use
How to test headphones online
Wear headphones with L/R marks on the correct ears, lower volume, then run Left and Right channel tests. You should hear each side independently.
If sides are swapped, reverse the headset or check OS channel settings. If one cup is silent, try another device to separate cable/driver faults from system routing.
Mobile users often land here after noticing uneven earbuds. The same console also offers stereo alternating and mono modes for a fuller earphone check.
- Seal in-ear tips properly—poor seal can feel like a “dead” side.
- For Bluetooth, connect first and select the headset as the system output.
- This is not a hearing test and does not measure SPL or audiogram results.
Headphone FAQ
Earphone and headset questions
Why is only one earbud working?
Causes include dirt in the mesh, a damaged driver, Bluetooth multipoint glitches, or the OS sending mono to one side. Try another source device to isolate the issue.
Can I test Bluetooth headphones in the browser?
Yes. Pair them, select them as the system output, then run the channel tests. A small wireless delay is normal.
Does the headphone test need microphone permission?
No. Audio is generated locally and never recorded.