Show HN: A browser-based tone generator built with the Web Audio API

3 eddguzzo 0 5/20/2025, 4:20:51 PM maketonesonline.com ↗

I built maketonesonline.com — a simple browser-based tone generator to experiment with the Web Audio API.

What it does:

Generates tones from 20 Hz to 20,000 Hz

Supports sine, square, triangle, and sawtooth waveforms

Lets you adjust frequency, volume, and left/right stereo pan

Includes multi-tone, binaural beat, subwoofer/bass frequency, and sweep tone modes

It’s useful for testing speakers, hearing tests, exploring sound design, or just seeing how high a pitch you can still hear.

Check it out: https://maketonesonline.com

I’d love your thoughts, bug reports, or ideas for improvement!

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Show HN: A browser-based tone generator built with the Web Audio API

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