SoundsChecker

Name: SoundsChecker
Author: SoundsChecker Tools

Under review

Free browser sound tests for speakers, mics & headphones

SoundsChecker is a free set of browser-based sound test tools. Test left/right speakers, headphones, microphones, bass, frequency response and noise levels instantly with no download or sign-up.

Built by SoundsChecker Tools · Audio · Free

Coming soon on Launch Llama Tools

Community listing

Listing status

0upvotes

Community score

SoundsChecker Tools (Joined Nov 2026)

Founder

Compared against 4 alternatives

Market comparison

SoundsChecker is a free set of browser-based sound test tools. Test left/right speakers, headphones, microphones, bass, frequency response and noise levels instantly with no download or sign-up.

About

Every test is synthesised live by the browser's own audio engine, so nothing is pre-recorded or streamed from a server. The site bundles more than 70 checks, including a stereo balance test, a polarity check that plays the same 80 Hz tone in phase and out of phase, a tone generator covering 20 Hz to 20 kHz, and a decibel meter with calibration offset. Microphone checks run locally in the tab, so audio is never uploaded.

A Firefox extension is also available: https://addons.mozilla.org/en-US/firefox/addon/soundschecker/

Key Features

Plays left, stereo and right test tones to confirm each speaker channel
Runs an in-phase versus out-of-phase 80 Hz polarity check
Shows a live mic level meter and waveform, then records and plays back five seconds
Generates sine, square, sawtooth and other tones from 20 Hz to 20 kHz
Measures room noise in dB with live, minimum, average and maximum readings
Tests 5.1 and 7.1 surround channels for home-theatre wiring faults

Use Cases

Finding out why only one side of headphones or speakers plays, using the left and right audio test
Checking whether a microphone is picking up sound before a call or recording
Estimating room noise in dB to see whether a space is getting too loud

From the founder

Who it's for

“Anyone who wants to quickly test speakers, headphones or a microphone in the browser.”

About me

“We build SoundsChecker Tools, simple free audio test tools that need no download or sign-up.”

— SoundsChecker Tools, founder of SoundsChecker

Who it is for

Home-theatre owners checking whether 5.1 or 7.1 channels are wired correctly
People whose colleagues or friends say they can't hear them on calls
Anyone troubleshooting audio on a laptop or PC without installing software

Pricing

SoundsChecker is free to use. See the website for details.

FAQ

How do I test if my speakers are working?

Lower your volume, click Left, then Right. Each should play only from its own side. Then click Both and confirm the sound is centred.

Why do I hear sound from both speakers when I click Left?

Your system may be in mono mode, you may be using a single speaker or soundbar, or software enhancement is upmixing the audio. Turn off mono audio and enhancements and retest.

Is this sound test free?

Yes. All SoundsChecker tools are free, need no account and require no download.

Does this work on phones?

Yes, in modern iPhone, iPad and Android browsers. On iPhone, turn off the silent switch or the page may play nothing.

Can I test Bluetooth headphones?

Yes. Connect them first. If audio becomes muffled, the headset may have switched to hands-free call mode; close any call apps.

Why is there a delay before sound plays?

Bluetooth adds roughly 100–300 ms of latency, and browsers require a click before audio can start. Wired outputs start almost instantly.

Will this test damage my speakers?

Not at sensible volumes. Start low, avoid long loud playback of very low or very high tones, and stop if you hear distortion.

Do you record my audio?

No. Output tests don't use the microphone, and the mic tools process audio locally.