What is Web Harmonium?

Web Harmonium is a free online harmonium — a virtual harmonium simulator that runs in your browser. It reproduces authentic harmonium sound with adjustable reverb, reeds, transpose, and octave controls, playable via touch, computer keyboard, or a MIDI keyboard.

Is Web Harmonium free to use?

Yes, Web Harmonium is completely free to use. It is an open-source project under MIT License with no hidden fees, subscriptions, or premium tiers.

Does Web Harmonium work with MIDI keyboards?

Yes, Web Harmonium supports MIDI keyboards through the Web MIDI API. Simply connect your MIDI device and the browser will prompt for permission to access it.

Can I record my playing?

Yes. Web Harmonium has a built-in recorder — press the Record button, play, and download your performance as an MP3 file. No extra software is needed.

What browsers are supported?

Web Harmonium works on all modern browsers including Chrome, Firefox, Safari, and Edge (latest 2 versions). MIDI support requires browsers with Web MIDI API implementation.

Web Harmonium

A real Indian harmonium you can play right in your browser.

Checking for MIDI keyboards

Harmonium

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0:00

Reverb

Transpose: C

Octave: 3

Reeds: 0

Shortcuts ↑/↓ Volume Tab Reverb ←/→ Transpose PgUp/PgDn Octave Alt + ←/→ Reeds

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The same harmonium, free on Android

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