Check your speakers or earphones and their left and right channels.
Press a button to play a soft "ding". Check that the side you hear matches the speaker that lights up.
Check how tones sound from low to high. Moving the slider changes the pitch smoothly while it plays. This is for checking how it sounds, not a hearing test.
Changes continuously from low to high over about 8 seconds. Useful for spotting a speaker's rattle (resonance).
Over a few seconds the sound moves from left to right, so you can check the stereo spread (the left-to-right movement).
🔒 No microphone is used; tones are synthesized on your device and never sent.
Earphones and headphones have a left (L) and a right (R) side; wearing them wrong swaps the channels. If "Play left" sounds in your left ear and "Play right" in your right ear, left and right are correct. If they are reversed, swap the sides. Left/right position matters for films, music and games, so it is worth checking in advance.
Pitch is measured in hertz (Hz): smaller numbers are lower tones, larger numbers are higher tones. Here you can vary the pitch continuously from 20 Hz to 16 kHz (16,000 Hz). Low tones show how the speaker handles bass; high tones tend to reveal differences from device and environment.
"Sweep" plays continuously from low to high, which is often used to check for a resonant "rattle" at a particular pitch. How you hear depends on gear, volume, background noise and individual differences. This tool is for checking how things sound, not for diagnosing your hearing or your gear.
Causes vary, but check these in order: (1) the device volume is up and not muted; (2) the output is going to the device you expect (Bluetooth earbuds connected to another device, or sound coming from a TV, are common); (3) on an iPhone, the side silent switch is off; (4) the browser tab is not muted (you can often check by right-clicking the tab); (5) reload the page and press a button first — some browsers enable audio only after your first click.
First check that the earbuds are not on the wrong ears. Most earbuds mark "L" for left and "R" for right. In this test, pressing "Play left" should sound in your left ear. If it is reversed, swap the earbuds, or check the earbud or cable markings. Rarely a device or app has the channels swapped in its settings.
How you hear depends on your speakers or earphones, the playback volume, background noise and natural individual differences. This tool does not diagnose your hearing or your gear. Finding a high tone hard to hear does not, on its own, mean a fault or a hearing problem. If you are concerned, try another device or raise the volume slightly (but not too much).
If the tones play correctly here, the device itself is likely working. When a meeting app has no sound, checking that the app's speaker (output device) matches the device you are actually using is a useful clue, since apps often let you pick the output separately. Setups vary, so this is not definitive.
No. This tool does not use the microphone. The tones are synthesized on the spot inside your browser and are never sent to a server or recorded. Everything stays on your device.
Yes. It works in phone and tablet browsers, for checking earbud left/right or that the speaker makes sound. On an iPhone, the side silent switch being on can stop sound, so turn it off and try again.
Prefer the Japanese version? スピーカー・イヤホンテスト（日本語版）
