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Device test

Play each side and check it comes from the right place.

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Speaker test: check left, right and the output device

Play a tone through each side. If you hear the left tone on the right, your channels are swapped — and if you hear nothing, the output device is the first thing to check.

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The short answer

To test speakers, play the left tone and then the right tone below and confirm each comes from the correct side. Silence on both usually means the browser or system is sending audio to a different output, not that the speakers are broken. Swapped sides point at a cable or a channel-balance setting.

Getting it right

Four things worth knowing

  • Test with the volume you will actually use

    A tone at full volume proves the speakers work but tells you nothing about whether a call will be audible. Set a normal listening level first.

  • The browser and the system can disagree

    Your operating system may be sending sound to the headphones while a meeting app targets the laptop speakers. If the tone plays here but not in a call, check that app's own output setting.

  • Swapped channels are usually the cable

    If left plays on the right, check a reversed 3.5mm extension or a channel balance slider that has been dragged. It is rarely the speakers themselves.

  • Use the sweep to hear what is missing

    The frequency sweep runs low to high. A speaker that goes silent partway through, or buzzes at one pitch, has a real fault worth knowing about before a presentation.

Nothing leaves your device

This test runs entirely in your browser. There is no upload, no recording and no server that could receive anything — close the tab and it is gone.

  • No sign-up and no account
  • Nothing recorded or stored
  • Works with an ad blocker on
  • Free, and staying free
FAQ

Questions people ask

Anything we've missed?

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No sound at all: how do I troubleshoot it?

Three quick checks, in order: the system volume and mute, the selected output device, and whether the browser tab itself is muted — most browsers show a small speaker icon on the tab and allow muting a single site. If none of those help, plug in headphones: a tone there means the fault is in the speakers or their cable.

Can I choose which speakers to use?

Browsers do not let a page choose your output device in most cases; that choice belongs to your operating system. Change it there and the tone follows.

Why does one side sound quieter?

Either a balance setting shifted away from centre, or a failing driver. Play each side in turn at the same volume — a clear difference points at hardware.

What does the sweep test tell me?

It plays rising frequencies so you can hear the range your speakers cover. Small laptop speakers legitimately produce little below about 200Hz; a rattle or a dropout in the middle of the range is a fault.

Is anything played through my microphone?

No. This page only produces sound. It never requests microphone access, so nothing is captured.

Will this damage my speakers?

No. The tones are generated at a moderate level, and you control the volume. As always, start low rather than high, especially with headphones on.

Test it for something specific

Other device tests

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Before it matters

Find the problem now, not mid-sentence

Every one of these runs in the browser and checks one thing properly. Nothing is uploaded, nothing is recorded, and none of them need an account.

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