Speaker Test
OutputFree online speaker test and speaker tester — left and right channels, stereo balance and a frequency sweep in your browser.
Everything runs in your browser. Nothing is uploaded.How to use the Speaker Test online
- 01 Pick your output device and set a comfortable volume.
- 02 Play the Left channel — sound should come only from your left speaker.
- 03 Play the Right channel and confirm it is on the right.
- 04 Run the frequency sweep to listen for buzzes or dead ranges.
- 05 Play both channels to check balance, then finish for a verdict.
Common problems & fixes
- Channels are reversedSound settings → your device → Properties, and check the left/right balance and speaker configuration.
- No sound at allConfirm the right output is the default device and the tab/system is not muted.
- Wrong output deviceSystem Settings → Sound → Output, pick the device, then re-select it above.
- Balance off-centerSound → Output → Balance slider; reset it to the middle.
- Only one channel playsOpen pavucontrol and check the port/profile and per-channel levels.
- Crackling on sweepLower the sample rate in your audio server, or try another output port.
Related checks
While you are here, you can also watch the input level while you talk, compare the same sweep over headphones, or check the camera too before a video call.
Working through the whole category? Browse all audio tests in one place.
Frequently asked questions
Play left, right, and sweep tones on this free online speaker test and confirm which channel you hear. Everything runs in your browser.
Check the OS output device, mute, and volume, then run L/R tones here. If nothing plays, the issue is outside this page. Full walkthrough: speaker not working.
Then the speakers and this page are fine — the OS is probably routing apps elsewhere, or a service crashed. Confirm the default output device and mute state, then run the left/right tones again. Full walkthrough: speaker not working.
Yes — this speaker checker plays each channel on its own so you can confirm stereo wiring and balance.
Yes — play Left alone, then Right alone, and confirm each side responds before you run the sweep or both channels together.
Sweeping 20 Hz → 20 kHz reveals ranges your speakers cannot reproduce or that buzz, which a single tone might miss.
Per-tab output switching (setSinkId) is only in some browsers. Where it is unavailable, change the output in your OS sound settings.
No. This tool only plays tones through your speakers — it uses no microphone and uploads nothing.