Sound Test
Test your speakers, stereo channels and microphone right in the browser — tones, live level meter and instant playback.
Tones are generated locally with the Web Audio API and microphone audio is analysed in your browser only. Recordings stay in memory on your device and are never uploaded.
How to Test Your Speakers and Microphone
Test each speaker
Set a comfortable volume, then play the Left tone and the Right tone one at a time and confirm each one comes from the correct side.
Confirm the result
Tick "I heard it" for each channel. If a side stays silent, that speaker, its cable or the balance setting is at fault.
Test your microphone
Start the microphone, speak normally and watch the live level meter and waveform move, then record a few seconds and play it back to hear yourself exactly as others hear you.
What This Sound Test Checks
Audio faults are easy to misdiagnose because so many layers sit between the app and the speaker: the operating system output device, the balance and volume mixer, the cable or Bluetooth link, and finally the driver itself. Playing a known-good tone into one channel at a time removes the guesswork — you learn straight away whether the failure is one speaker, one channel of the cable, or a system setting that has muted a side.
The tone generator produces a real waveform with the Web Audio API rather than playing a recorded file, so the frequency, waveform shape and channel are exact. Sweeping from low to high is the fastest way to hear where small speakers roll off, to find a buzzing resonance in a car or laptop chassis, and to check the top of your own hearing range.
The microphone half of the test answers a different question: is the input device actually capturing sound? The level meter shows that the signal arrives, the waveform shows whether it is clean or clipping, and the record-and-playback loop confirms the whole capture chain end to end — which is what you want to verify before a call, an interview or a recording session.
Frequently Asked Questions
How do I test my speakers online?+
Press "Play Left" and then "Play Right" in the speaker section above. Each button plays a clean tone through one channel only, so you can hear immediately whether both speakers, earbuds or headphone drivers are working and whether they are wired to the correct side.
How do I test my microphone in the browser?+
Click "Start Microphone" and allow access when your browser asks. Speak normally: the level meter and live waveform should move with your voice. Then press Record, talk for a few seconds and play the clip back — that confirms the microphone captures real audio, not just that it is detected.
Why can I only hear sound from one side?+
If only one channel plays, check three things in order: the audio balance setting in your operating system (it can drift fully to one side), the cable or connector (a partly inserted 3.5 mm jack often mutes one channel), and the speaker itself by testing the same file on another device. This test isolates each channel so you can tell which of the three it is.
What frequencies should I be able to hear?+
Healthy adult hearing covers roughly 20 Hz to 20 kHz, but the audible top end drops with age — many adults over 40 stop hearing above 14–15 kHz. Small laptop and phone speakers also physically cannot reproduce very low bass. Use the frequency presets to check the range your speakers and your ears actually reach.
Does the microphone test record or upload my voice?+
No. Audio is processed locally by your browser using the Web Audio API. The optional recording is held in your browser’s memory only so you can play it back or download it, and it is discarded as soon as you close the page. Nothing is uploaded to any server.
The browser will not let me use my microphone — what now?+
Microphone access requires a secure (HTTPS) page and your permission. If you blocked it earlier, click the padlock icon in the address bar, set Microphone to Allow and reload. Also close other apps that may be holding the device exclusively, such as a video-call or recording app.