Speaker TestNEW
Play test tones to check the left and right channels of your speakers
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AllFreeTool is a free online speaker test that plays test tones through your speakers so you can check them for distortion, balance and channel faults. It offers a steady tone, a frequency sweep across the audible range, and white noise, and you can play the sound on both channels or on one side at a time. The audio is generated in your browser, so nothing is uploaded.
It is the quickest way to confirm that a speaker is not rattling, that the left and right channels are balanced, or that a Bluetooth headset is connected properly before a call. Playing a sweep is especially effective, because a rattle or a buzzing speaker is often audible on a specific frequency range rather than on a steady note.
Why use Speaker Test on AllFreeTool?
Three Test Sounds
Play a steady reference tone, a full frequency sweep, or white noise.
Channel Test
Play both channels together or isolate the left or the right one to find a faulty side.
Frequency and Volume
Choose the frequency for a steady tone and set the output level yourself.
Local Audio
The sound is synthesised in the page, so no audio stream is ever sent to a server.
How to use Speaker Test
Choose a Sound
Pick the standard tone, the frequency sweep or white noise to test with.
Set Level, Channel
Adjust the volume, pick a frequency where relevant, and choose the channel.
Listen and Judge
Play the sound and listen for crackling, rattling, imbalance or a dead channel.
Common questions
Which test should I use for a problem?＋
A frequency sweep is the most revealing, because a rattling cone or a buzzing voice coil often shows up on only a narrow range of frequencies. White noise is good for spotting constant background hiss, and a steady tone is the easiest way to judge overall balance and volume.
How do I find a faulty channel?＋
Play the sound on the left channel only, then the right channel only, and compare. If one side is silent, quiet, or distorted while the other is clean, the fault is on that side of the speaker, the cable, or the output selection rather than in the audio source.
Why is the sound crackly at high volume?＋
That usually means the speaker is being driven beyond what it can handle, or that it is running with a boosted low end that makes the cone bottom out. Turning the volume down a little, or using the sweep to identify the offending frequency, usually confirms which case you have.
Is any audio uploaded?＋
No. The tones and the noise are produced by the Web Audio oscillators inside the page, with no network request involved. Nothing you play is captured, transmitted or stored, and the tool also works with no internet connection.