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Speaker Test – Left & Right Audio Channel Test

Test your speakers and headphones: play sound on the left, right or both channels, run a stereo sweep, and generate tones from 20 Hz to 20 kHz.

  • Free, no sign-up
  • Runs in your browser, nothing uploaded

About the Speaker Test

Check that your speakers or headphones work and that left and right aren't swapped. Play beeps on each side, sweep from left to right, or use the tone generator to test bass, treble and your hearing range.

Key features

  • Left, right and both-channel test beeps
  • Stereo sweep from left to right
  • Tone generator from 20 Hz to 20 kHz
  • Sine, square, triangle and sawtooth waves
  • Adjustable volume
  • Works with speakers, headphones and earbuds

Test left, right and stereo sound

Make sure both speakers or both sides of your headphones work, and that left and right aren't swapped, which matters for games, films and music. Start with your volume low, then click Left, Both and Right.

Using the tone generator

RangeWhat you'll test
20–60 HzSub-bass: subwoofers and large speakers
60–250 HzBass
250 Hz–4 kHzMidrange: voices and most instruments
4–10 kHzPresence and detail
10–20 kHzTreble and "air"; also a rough hearing check

A sine wave is a pure tone. Square and sawtooth waves contain many harmonics and sound buzzier, which helps find rattles in speakers.

Troubleshooting

  1. Check the output device in your system sound settings (speakers, headphones, HDMI monitor).
  2. Check the balance slider is centered.
  3. Turn off mono audio if you want separate left and right.
  4. Try another cable or port to rule out a loose connection.

Mic test, webcam test, and reaction time test.

How to use the Speaker Test

  1. Open the test. It's ready immediately, with nothing to install.
  2. Follow the on-screen prompt: click, type, press or watch as instructed.
  3. Read your results, which update live as you test.
  4. Repeat as often as you like. Results stay in your browser.

Frequently asked questions

How do I check if my left and right speakers are swapped?

Click Left: the beeps should come only from your left speaker or earbud. Then click Right. If they come from the wrong side, the cable, headphones or system balance setting is swapped.

Why do I only hear sound from one side?

Common causes are a loose or damaged cable, a partly inserted plug, a dead earbud, the system's balance slider set to one side, or mono audio turned on in accessibility settings.

What frequencies can people hear?

Roughly 20 Hz to 20 kHz when young. The upper limit drops with age; many adults can't hear much above 15–17 kHz. Small speakers and laptop speakers often can't reproduce very low bass.

Is it safe to play high frequencies?

Keep the volume low, especially with headphones. High and very low tones can sound quiet even when they're loud enough to harm hearing or speakers.

Are my camera and microphone recorded?

No. Audio and video are processed live in your browser and never uploaded. The only recording is the optional 5-second mic playback, which stays on your device and disappears when you leave the page.

Why does my browser ask for permission?

Browsers require your permission before any site can use your camera or microphone. You can revoke it at any time from the icon in the address bar.

Do these tests work on phones?

Most do: mic, webcam, speaker, screen, reaction time and click tests work on phones and tablets. The keyboard, mouse and gamepad testers need those devices connected.

Last updated:

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