Sound Test
Tap Left, Stereo, or Right to check your audio output in seconds — right in your browser.
Turn your system volume down first
Start at a low volume, especially with headphones and low bass tones, then raise it slowly.
Press Esc to stop all sound
All audio tools
One focused page per tool — testing, generators, and analysis.
Left Right Speaker Test
Check that left really is left and right really is right, on speakers or headphones.
Open toolSpeaker Test
Stereo balance, frequency sweep, phase, and sub-bass checks for any speaker system.
Open toolHeadphone Test
Check left/right channels, smooth panning, and balance on any headphones or earphones.
Open toolBass Test
Sine tones from 10–200 Hz with a descent mode to find your lowest audible/reproducible frequency.
Open toolSpeaker Phase Test
Compare in-phase vs out-of-phase tones to catch reversed speaker wires.
Open toolHearing Test
Screen 250 Hz–8 kHz in each ear with rising tones. Not a medical device.
Open toolHearing Range Test
Find the highest (and lowest) frequency you can hear — 20 Hz to 20 kHz, no diagnosis.
Open toolSurround Sound Test
Click FL/C/FR/SL/SR/RL/RR/SUB nodes or run Auto Test for 5.1/7.1 layouts.
Open toolMic Test
Live level meter, device picker, and local record & playback. Nothing uploaded.
Open toolTone Generator
Play sine, square, sawtooth, or triangle tones at any frequency from 20 Hz to 20 kHz.
Open toolFrequency Sweep Test
Sweep 20 Hz–20 kHz with adjustable duration, direction, and linear/log scaling.
Open toolWhite & Pink Noise Generator
White, pink, and brown noise with a 15–120 minute timer for focus or sleep.
Open toolBinaural Beats Generator
Delta/Theta/Alpha/Beta/Gamma presets with custom beat & carrier. Headphones required; not medical.
Open toolSpectrum Analyzer
Live FFT bars, waveform, and spectrogram from your mic — all computed locally.
Open toolAudio Latency Test
Estimate round-trip audio delay (output + mic) — useful for Bluetooth headphones.
Open toolHow to use
- 1
Set up your device
Use your usual speakers or put your headphones on. Set the system volume to a moderate level first — you can raise it later if needed.
- 2
Play each channel
Click Left, Stereo, and Right above. Each button plays a short tone through that channel only. Stereo plays through both sides.
- 3
Judge the result
Left should sound only in the left ear or speaker, Right only on the right, and Stereo evenly on both sides. If one side is silent or the sides seem swapped, check your wiring, adapter, or system balance settings.
SoundTester is built on the Web Audio API, the audio engine built into every modern browser. When you press a button, the browser synthesizes the tone locally and sends it straight to your sound device — no audio file is downloaded and nothing is recorded or uploaded.
Because levels depend on your device volume, operating system, and browser, this quick test checks that each channel works and is wired correctly. It is not a calibrated measurement of loudness or frequency response.
FAQ
How accurate is this sound test?
It reliably tells you whether the left and right channels are present, audible, and not swapped. It does not measure exact loudness or frequency response, because output levels depend on your volume settings and hardware. For channel and wiring checks it is all you need.
Is any audio recorded or uploaded?
No. All sound is generated and played inside your browser using the Web Audio API. There is no recording, no upload, and no account. Tools that use your microphone ask for permission first and process everything locally.
Does it work on a phone?
Yes. The channel test, speaker test, tone generator, and most other tools work on modern mobile browsers. Tap a button once to unlock audio if your browser blocks autoplay.
Why do I hear nothing on one side?
Play Stereo first: if both sides work together but Left or Right is silent alone, your wiring, a mono adapter, or an operating-system balance setting is the usual cause. Laptop speakers may also mix both channels into one physical speaker.
What is the difference between this page and the speaker or headphone test?
This page is the fastest possible check: three buttons, one channel each. The speaker test adds a full workflow with sweep, bass, and phase checks; the headphone test adds a panning check and burn-in noise. Links to every tool are on the cards below.