Ready when you are
Local onlySet a comfortable volume, then play a test tone.
LEFT♪
RIGHT♪
Device check
Speaker Test
Play a clear test tone through both speakers, or check the left and right channels separately.
✓ Instant result✓ No sign-up✓ Runs in your browser
01
How to use this test
- Lower your volume to a comfortable level.
- Play the left, right or both-channel tone.
- Confirm the sound comes from the expected side.
02
If something looks wrong
- Check that your headphones or speakers are firmly connected.
- Confirm the correct output device is selected.
- Try another browser tab or app to rule out a system-wide issue.
What the result means
Channel tones verify routing, not speaker fidelity.
The test generates a short browser audio tone and routes it to the left channel, right channel or both. Hearing the expected side confirms that the browser's output, system routing, connection and speaker or headphone channel are aligned. Start quietly because the final loudness is controlled by both the page and the device volume.
A correct channel result does not mean the speaker reproduces every frequency accurately. Small laptop speakers, headphones, Bluetooth processing and room acoustics all color the sound. The useful question here is whether sound plays, whether it comes from the intended side and whether one channel is obviously missing or intermittent.
Reading the signal
Compare the two sides at the same volume.
Left and right match
Both channels should sound similarly loud and clean when your head or headphones remain in the same position.
Channels are reversed
Headphones may be worn backwards, analog plugs or speaker cables may be swapped, or a software channel map may be reversed.
One side is silent
Check balance controls, plugs, cables and Bluetooth pairing. Then try another audio source to separate a site problem from a system-wide fault.
Crackle or dropouts
Loose connectors, radio interference, a damaged cable, high volume or an overloaded Bluetooth link can interrupt an otherwise correct channel.
Browser-test limits
This is not a hearing test or a frequency-response measurement. Perceived balance can be affected by hearing, ear fit and room position, so swap the earpieces or speaker positions when isolating hardware from perception.
Read our complete testing methodology →Troubleshooting
From symptom to next step.
What you seeLikely causeWhat to try
No tone playsThe tab is muted, the wrong output is selected or the browser has not started audio after a user gesture.Unmute the tab, select the correct system output, press the test button again and verify that another website can play sound.
Only one side worksBalance is offset, a plug is not fully seated or one channel has a cable or driver fault.Center the system balance, reseat the connector, test another port and swap left and right hardware if possible.
Bluetooth sound stuttersWireless interference, low battery or a profile switch is interrupting the stream.Charge the device, move closer, disconnect other Bluetooth audio devices and reconnect using the normal stereo profile.
Quick answers
Good to know.
Is the test tone safe?+
The tone starts and ends gently. Keep your device volume at a comfortable level, especially with headphones.
Why are left and right reversed?+
Your headphones may be worn backwards or the speaker cables or system channel mapping may be reversed.
Why does the tone come from a different output?+
Web pages normally use the operating system's current default output. Change that output in system sound settings or use a browser output selector if your browser provides one.
Can this test measure bass or treble?+
No. A simple tone is intended to verify playback and channel routing, not the frequency range or tonal accuracy of the speaker.
Why is one ear quieter only with headphones?+
Check ear-pad seal, tip size, balance settings and the connector. Wearing the headphones backwards or swapping ears can help distinguish fit or hearing from an electrical channel problem.