SPEAKER TEST (LEFT / RIGHT)
Click on a button to test that speaker. Stop the sound at any time.
⏸ No speaker playing
◀️
Left Speaker
Click to Test▶️
Right Speaker
Click to Test HOW TO USE
- Ensure you are using stereo headphones or speakers.
- Click "Left Speaker" — you should hear sound only from the LEFT.
- Click "Right Speaker" — you should hear sound only from the RIGHT.
- If you hear sound from the wrong side, your L/R channels may be swapped.
- Click "Test Both" to test both channels simultaneously.
FAQ
Frequently Asked Questions (FAQ)
Yes, this tool uses the standard Web Audio API which is supported on all modern browsers including Chrome, Firefox, Safari, and Edge.
It means your audio cable or headphone jack is connected incorrectly, or your audio driver's channel assignments are reversed. You can fix this in your OS sound settings.
Yes! Connect your Bluetooth headphones first, then open this page. The test will play through the currently selected audio output device.
This can happen with mono speakers or mono headphones. Stereo channel separation only works with stereo audio devices. Internal phone speakers are often mono.
When you click 'Test Left', you should hear a tone only from your LEFT ear (if using headphones) or from the LEFT physical speaker of your device.
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