Play stereo test tones, isolate left and right channels, and verify browser audio output without leaving the page.
Channel test
L / R / Stereo
Frequency range
110-1760 Hz
Device routing
Browser dependent
Browser audio support
Checking environment
Output device
System default output
Channel focus
Stereo / Center
Current frequency
440 Hz
This browser can still play tones, but output-device switching is not available here.
60%
Tone generator
Start with low volume, then confirm center, left, and right playback.
440 Hz
A compact view of the current test state and the strongest signal detected so far.
Support
Checking environment
Output device
System default output
Channel mode
Stereo / Center
Frequency / Volume
440 Hz / 60%
Detected 0 output device(s). Start with stereo playback, then compare left and right channel tests.
Some browsers let this page target a specific speaker or headset. Others only play through the system default output. The tester explains which mode is available.
Verify the operating-system playback device, browser tab volume, hardware mute switch, and cable or Bluetooth connection before assuming the speaker is faulty.
Run the left and right channel tests first. If one side consistently fails, compare the result with another headset or speaker on the same device. That helps separate browser routing issues from a damaged cable, earcup, or system balance setting.
When the test page looks normal but you still hear nothing, the problem is usually outside the page itself. Run through these checks in order.
Make sure Windows, macOS, or your Linux desktop is not muted, and confirm the browser tab volume is not turned down in the mixer. This is the most common cause of complete silence.
The tone may be playing through a monitor, dock, USB headset, or disconnected Bluetooth target instead of your current speakers. Verify the operating system playback target before changing anything else.
Modern browsers often block audio until the user clicks somewhere on the page. If the tester loads but stays silent, press one of the play buttons again after interacting with the tab.
Start with the stereo preset to check for total output failure. Then run left and right channel tests to see whether the issue is a dead side, a balance setting, or a connector problem.
Wireless headphones, USB docks, and display audio outputs can remain selected after the physical connection changes. Reconnect them or switch away and back in the operating system sound menu.
If this page and every other site stay silent, the fault is probably in the operating system, driver, cable, headset, or speaker hardware rather than the browser test page.
No sound anywhere
Usually points to mute state, wrong output target, driver failure, or a disconnected speaker or headset.
Stereo works but left or right fails
Usually points to channel balance, loose plugs, mono adapters, damaged earcups, or speaker-side hardware failure.
Only this page is silent
Usually points to autoplay restrictions, browser audio routing limits, or the page still targeting the default system output instead of the device you expect.
Bluetooth device connects but stays silent
Usually means the headset paired successfully but did not become the active playback target, or the profile changed during reconnect.
Continue with the next check that best matches the symptom you are troubleshooting.
Best next step
Monitor live input levels, permission state, and device changes for your microphone.