UD5 Toolkit
Decibel Level Reference – Online Common Sound Examples
Interactive scale showing dB levels of everyday sounds with playable samples. Hearing safety.
Tag: Audio Level & Loudness Meter
3+ toolsBattery Status API Viewer - Online Check Level
See your device's battery level, charging status, and discharge time using the Battery Status API. Fun utility.
Microphone Sensitivity Tester - Online Input Level Meter
See a live VU meter of your microphone's input level. Test if your mic is working and adjust gain. Privacy‑friendly.