Online Tone Generator

Welcome to the Online Tone Generator. It's free, simple and easy to use.

Enter your desired frequency and press play. You will hear a pure sine wave sampled at a rate of 44.1kHz. The tone will continue until the stop button is pushed. (This feature is currently only compatible with Firefox version 4 or later (Windows or Mac versions) so if you don't hear any sound, click here to download the latest version of Firefox and please try again.)

For a small donation of your choice, you can download and save a 30 second WAV file (5MB) that can be played at any time and is universally compatible with all browsers and software.

Attention! Always make sure headphones/speakers are set to a comfortable volume to avoid damage to hearing or equipment.

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Online Tone Generator utilises HTML5 and the Mozilla Audio Data API. It is optimized for use with FireFox 4.0 or later.

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