Speaker Test
Test your speakers or headphones: left and right channel check, stereo pan, frequency sweep from deep bass to treble, and volume control. Free, instant, runs in your browser.
How it works
- 1
Set a safe volume
Start with your system volume low, especially on headphones.
- 2
Test left and right
Play the left and right sounds and confirm each comes from the correct side.
- 3
Run the sweeps
Pan across the stereo field and sweep from deep bass to high treble.
- 4
Read the result
Silence, a swapped side or rattling at certain notes points to a connection, setting or speaker problem.
Common uses
- Confirm headphones or earbuds have left and right the correct way round.
- Check a new speaker setup or Bluetooth speaker plays both channels.
- Find rattles or missing bass in laptop speakers or a soundbar.
About the Speaker Test
Test your speakers or headphones: left and right channel check, stereo pan, frequency sweep from deep bass to treble, and volume control. Free, instant, runs in your browser.
Every sound is generated live with the Web Audio API: a tone routed to one channel at a time, a pan across the stereo field and a logarithmic sweep across the audible range. Nothing is downloaded or streamed, so it loads instantly and works offline.
Speaker Test is part of a free, privacy-first toolkit. It uses your browser's built-in device APIs, so it starts instantly with nothing to install — and nothing you type, say or show ever leaves your device.
Because speaker test works without any sign-up or installation, you can use it as often as you like and it's always available — on desktop or mobile, and even offline.
Explore more device tests, or try Mic Test · Webcam Test.
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Speaker Test — FAQ
Press Left, then Right. Each sound should come only from that side. If they're swapped, check the connections or which way round the headphones are worn.