OnlineAudioTest

What is OnlineAudioTest?

OnlineAudioTest is a free, browser-based set of audio tools for checking mics, speakers, headphones, latency, hearing, and recording quality. It helps you quickly spot problems like channel swaps, weak microphone input, Bluetooth lag, echo, distortion, and damaged drivers. Everything runs instantly in the browser with no signup, no download, and no app install. The tools are simple to use, private by default, and work on mobile, tablet, and desktop. You can test stereo balance, measure audio delay, view live frequency data, record and trim voice clips, and get a mic quality score with useful feedback.

Key features

• Checks microphone input with live waveform and playback.
• Tests left and right channels for speakers and headphones.
• Measures Bluetooth and system audio latency in milliseconds.
• Estimates hearing range and hearing age with tone sweeps.
• Shows real-time frequency spectrum with peak hold and notes.
• Records, trims, normalizes, and downloads audio in browser.