Every tool on this page runs directly in your browser: no apps, no signup, no permissions beyond what the tool itself needs. They work on iPhone, Android, tablets, and computers, and they are all free. Pick the tool that matches your problem and use it immediately.
Speaker Cleaner
Remove dust and grime from speaker grills with a 160 to 2000 Hz frequency sweep.
Bass Test
Play deep tones from 20 to 250 Hz and find the lowest note your device can produce.
Earbuds Water Eject
Push water out of wet AirPods and earbuds with a low frequency eject tone.
Frequency Generator
Play any tone from 1 Hz to 20 kHz with sine, square, triangle and sawtooth waves.
Headphone Test
Check left and right channels, stereo imaging and driver health in your headphones.
Hearing Frequency Test
Find the highest frequency you can hear with a guided tone ladder from 8 to 20 kHz.
Microphone Test
See your mic level live and hear how you sound with a record and playback check.
Sound Meter
Measure the approximate noise level around you with live, average and peak dB readings.
Which Tool Do You Need?
All of these tools build on the same idea: a speaker is a precision vibration device, and the right sound at the right frequency can clean it, test it, or reveal what is wrong with it. The trick is matching the tool to the symptom.
Your phone got wet: go straight to the water eject tool, which runs a guided three stage cycle. Wet AirPods or earbuds have their own route through the earbuds water eject, since the tone needs to play through the buds themselves.
Sound got duller over time: that is dust, and the speaker cleaner sweeps twelve frequencies to shake it out. Run it monthly and the problem stops recurring.
Something sounds or feels wrong and you want to know what: the test family isolates it. The sound test checks each speaker channel, the headphone test adds stereo and driver checks for earphones, the microphone test covers the input side, and the vibration test checks the haptic motor.
You want raw control or curiosity: the frequency generator plays any tone from 1 Hz to 20 kHz, the bass test finds your device’s low end floor, the hearing frequency test finds your ears’ high end ceiling, and the sound meter measures the noise around you.
When a tool reveals a problem it cannot fix, our guides take over: start with the 9 proven speaker fixes for the full diagnostic path.
FAQ
Are these tools really free?
Yes, all of them, completely. They run in your browser with no accounts, no trials and no locked features.
Do I need to install an app?
No. Every tool works directly on this website. The only optional install is our Android app, which packages the water eject cycle for offline use.
Are the sounds safe for my device?
Yes. The tones are ordinary audio within your speaker’s normal operating range, the same range music uses. Tools that involve headphones or high frequencies include their own volume guidance.
Which devices do the tools work on?
Anything with a browser and a speaker: iPhone, Android, tablets, laptops and desktops. Two exceptions are noted on their pages: browser vibration testing is Android only due to an Apple restriction, and microphone based tools need a device with a mic.