How to use the Speaker Test
- Set your system volume low, then click Left, Right or Both.
- Check that each sound comes from the matching side.
- Use the sweep to hear the sound move, the bass test for the low end, and the phase test to check speaker wiring.
What each test checks
- Left / Right — channels are swapped if “left” plays on the right. On headphones, check you’re wearing them the right way round; on speakers, swap the cables.
- Sweep — the sound should move smoothly from one side to the other. A gap in the middle points to a balance setting.
- Bass — a slow sweep from 40 to 120 Hz. Small laptop speakers usually start around 100–150 Hz; headphones and subwoofers go lower.
- Phase — plays the same tone in phase, then out of phase. Out of phase should sound thinner and harder to place; if the two sound the other way round, one speaker’s + and − wires are swapped.
No sound at all?
Check the output device in your system sound settings, unmute the browser tab, and make sure Bluetooth headphones are connected. Testing a microphone too? Use the Mic Test.
Also searched as: left right speaker test, stereo test, headphone test, audio channel test, sound test, bass test, test my speakers.
Tools that pair well with the Speaker Test
- Tone Generator — Play a pure tone at any frequency from 20 Hz to 20,000 Hz — sine, square, sawtooth or triangle — for testing speakers, tuning, hearing checks or science classes.
- Webcam Test — Check that your camera works and looks good before a video call — see the live picture, the real resolution and frame rate, and save a snapshot.
- Keyboard Tester — Press every key and watch it light up on the on-screen keyboard — find dead, stuck or repeating keys, see the key and code for each press, and check how many keys register at once.
- Dead Pixel Test — Fill your screen with solid colors, gradients and test patterns to spot dead or stuck pixels, backlight bleed and banding — on a new monitor, laptop, TV or phone.
Frequently asked questions
How do I know if my left and right speakers are swapped?
Click Left: if the sound comes from the right speaker or ear, the channels are swapped — reverse the cables or the headphones.
Why can’t I hear the bass test?
Small speakers can’t reproduce very low frequencies. Laptop speakers usually begin around 100–150 Hz.
Is anything uploaded or recorded?
No. Everything runs in your browser; results and settings are kept on this device only.
Can I install Speaker Test as a web app and use it offline?
Yes. Speaker Test is an installable web app (PWA) — installed from your browser, not downloaded from an app store. Click Install app at the top of this page in Chrome or Edge (Windows, macOS, Linux, ChromeOS) or on Android, use Share → Add to Home Screen on iPhone and iPad, or File → Add to Dock in Safari 17+ on a Mac. It then opens in its own window with its own icon, and because it runs entirely in your browser it keeps working offline. Firefox on desktop can’t install web apps. How installing works.