Speaker Test

Check that your speakers or headphones work and are wired the right way round. Play a tone through just the left channel, just the right, or both at once, and confirm the sound comes out where it should. Handy for spotting a dead earbud, a left-right swap, a loose cable, or a balance setting that's drifted to one side. You can change the tone's pitch and volume too. Everything is generated in your browser with the Web Audio API - nothing is recorded or uploaded.

Tech

Play a test tone through each channel to check your speakers or headphones are wired the right way round and both sides work.

Pick a channel to start the tone. Click it again to stop.

Tone frequency440 Hz

Volume50%

The tone is generated in your browser with the Web Audio API. Nothing is recorded, downloaded, or sent anywhere. If a side is silent, check the cable, the balance setting in your OS, and that the speaker isn't muted.

Checking left and right

Tap Left and you should hear the tone only on the left side, Right only on the right. If they're swapped, your cable or a system setting has the channels crossed. If one side is silent while the other plays, that side may be dead, muted, or unplugged. Both plays the tone evenly through each side at once.

Headphones vs speakers

The test works the same for wired headphones, Bluetooth earbuds, laptop speakers, or external monitors - whatever your browser is currently playing audio through. Switch your output device in the OS sound settings and run the test again to check the new one. For earbuds, hold each one to the matching ear so a swap is obvious.

Pitch and volume

The tone defaults to 440 Hz, the musical note A, which is easy to hear on most gear. Drop it lower to test how much bass a small speaker can manage, or raise it to check the highs. Start the volume low - a pure tone sounds louder than music at the same setting, and it's kinder to your ears.

Nothing is recorded

There's no microphone involved and no upload. The sound is built on the fly in your browser and stops the moment you click the channel again or leave the page.