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Audio Visualizer
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Headphone / Speaker Tester is a free, browser-based audio testing tool that lets you check left/right audio channels and stereo balance.
This browser-based audio output tester helps you verify left and right channel playback, stereo mapping, balance, and basic speaker or headphone output without installing software. It is useful before calls, recordings, gaming sessions, or troubleshooting a device that sounds wrong.
If you already know the exact issue, jump to the focused stereo and left-right speaker test built on the same audio engine.
One caveat on treble sweeps: if the top end goes silent early on headphones you trust, the limit may be your ears rather than the drivers. The mosquito tone test separates the two by stepping through fixed high frequencies and telling you which ones your hearing still reaches.
Yes. The page works with headphones, desktop speakers, monitors, and many external audio devices as long as your browser can play sound through them.
Play the isolated left and right tests and confirm the sound comes from the matching side. If it does not, your channel mapping is swapped somewhere in the chain.
No. The page generates playback in your browser and does not upload audio data.
