Omikuji Tools Text & Dev

Speaker Test

A free online speaker test to check whether left and right are swapped and how low and high your speakers or headphones can go. It has left, right and center test sounds, a 20 Hz–20 kHz frequency sweep, a test tone generator and a high-frequency audibility check. No microphone is used, so no permission is needed.

Features

  • Left, right and center test sounds, with an animation showing which side is playing, plus continuous left/right alternation.
  • A smooth logarithmic sweep from 20 Hz to 20,000 Hz that shows where you stopped it.
  • A tone generator with frequency slider and number input, sine/square/triangle/sawtooth waveforms and volume.
  • A step-by-step check from 8,000 Hz upward that records the highest tone you can hear.
  • Starts at a low volume and fades in and out. The Stop button stays at the bottom of the screen, and Esc works too.
  • No microphone and no permission needed. All sound is generated in your browser; nothing is sent anywhere.

Use cases

New earbuds or headphones

Check left and right, and how lows and highs come through, right after unboxing.

Checking the wiring

After rewiring speakers, make sure the left and right cables are not swapped.

Before a meeting

Before joining Zoom or Teams, make sure sound comes out where you expect (headset or laptop).

Audio settings

After changing the equalizer, balance or mono setting, confirm it does what you intended.

Privacy

This tool does not use the microphone and never asks for permission. All test sounds are generated and played inside this browser, and nothing about what you do or your results is sent to a server.

FAQ

Left and right sound swapped. What should I do?

First check the L/R marks on your earbuds and whether the speaker cables are plugged into the right sides. Then make sure the balance in your system sound settings is centered and “mono audio” is off. Built-in phone and laptop speakers are sometimes not split into left and right.

If I can't hear the high tones, is it my ears?

Not necessarily. Some speakers and earbuds cannot reproduce very high tones, depending on the model, and volume and room noise matter too. High frequencies are said to get harder to hear with age, but people vary a lot, and this tool does not judge your age or hearing. See a professional if you are concerned.

Does it need microphone permission?

No. It only plays sound and never uses the microphone. Even in browsers that let you choose the output device, it does not ask for microphone access, so the output list often does not appear; in that case, switch the output device in your system sound settings.

Can it damage my speakers?

The volume starts low and is capped at half of the digital maximum. Still, very low (below 50 Hz) or high tones played loudly for a long time can strain small speakers. Test at a low volume and stop right away if you hear distortion or rattling.

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Turn your volume down first

Lower your device volume before playing anything, especially with headphones or earbuds. Press “Stop” or the Esc key at any time.

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Left / right check

The side that is playing lights up. If you hear it from the other side, your channels are swapped.

If left and right are swapped: check the L/R marks on your earbuds, the speaker cables, and the balance and “mono audio” options in your system sound settings. Built-in phone and laptop speakers are sometimes not split into left and right.

Frequency sweep

Current frequency 20 Hz
Duration

Glides smoothly from a deep 20 Hz up to a high 20,000 Hz. Stop it where the sound disappears and the frequency stays on screen.

Test tone generator

Hz
Waveform

Change the frequency or waveform while it plays. Square and sawtooth waves sound much louder, so they are turned down automatically.

How high can you hear?

Plays higher and higher tones starting at 8,000 Hz. Press “I hear it” or “I can't hear it” for each one.

High frequencies are said to get harder to hear with age, but people vary a lot and this check does not estimate your age. Your speakers or earbuds may simply not reproduce very high tones; what they can play depends on the model. If you are concerned, get a proper hearing test.

How to use

  1. Turn your device volume down, then check the “Volume” slider on the page (it starts low).
  2. Press “Left” and “Right” and make sure the sound comes from the side that lights up. “Alternate” keeps switching sides until you stop it.
  3. Press “Start sweep” to play from low to high, and press “Stop here” where you can no longer hear it.
  4. Use the tone generator for a specific frequency, and the check at the bottom to see how high you can hear.

Mind the volume

Every test sound fades in and out briefly so nothing starts with a sudden blast or click. High tones and square waves can still be piercing, so start quiet and turn it up gradually. To stop, press “Stop” at the bottom of the screen or the Esc key.

Features

  • Left, right and center test sounds, with an animation showing which side is playing, plus continuous left/right alternation.
  • A smooth logarithmic sweep from 20 Hz to 20,000 Hz that shows where you stopped it.
  • A tone generator with frequency slider and number input, sine/square/triangle/sawtooth waveforms and volume.
  • A step-by-step check from 8,000 Hz upward that records the highest tone you can hear.
  • Starts at a low volume and fades in and out. The Stop button stays at the bottom of the screen, and Esc works too.
  • No microphone and no permission needed. All sound is generated in your browser; nothing is sent anywhere.

Use cases

New earbuds or headphones

Check left and right, and how lows and highs come through, right after unboxing.

Checking the wiring

After rewiring speakers, make sure the left and right cables are not swapped.

Before a meeting

Before joining Zoom or Teams, make sure sound comes out where you expect (headset or laptop).

Audio settings

After changing the equalizer, balance or mono setting, confirm it does what you intended.

Related tools

Webcam Test Mic Test Keyboard Tester Dead Pixel & Refresh Rate Test What Is My IP Classroom Noise Meter QR Code Reader

Privacy

This tool does not use the microphone and never asks for permission. All test sounds are generated and played inside this browser, and nothing about what you do or your results is sent to a server.