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Web Harmonium is a free online harmonium keyboard for browser play, notes learning, and song practice with no download.

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  • Guide for Mac
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Web Harmonium Changelog — Online Harmonium Updates

Follow the latest updates to Web Harmonium — new songs, features, and improvements

Initial Launch

v1.0.0

Web Harmonium goes live — play the Indian harmonium instantly in your browser.

2025/01/01

Core Features

We're thrilled to announce the launch of Web Harmonium — a free, browser-based Indian harmonium you can play instantly on any laptop or desktop.

  • Browser-based harmonium: Full 3.5-octave keyboard, no download or plugin required
  • Authentic multi-reed sampling: Every note recorded from a vintage Bina harmonium
  • MIDI controller support: Plug in any MIDI keyboard and play with zero configuration
  • Sargam notation display: Real-time Sa Re Ga Ma Pa notation above each key
  • Keyboard mapping: Complete QWERTY-to-Sargam guide for laptop playing
  • Reverb & bellows simulation: Real-time audio effects for a natural acoustic feel

Song Library

  • 20+ curated Sargam notations for classical, devotional, and Bollywood songs
  • Notation viewer with segment-by-segment breakdown (Mukhda, Antara)
  • Filter by genre: Classical, Devotional, Bollywood

Technical

  • Built on Next.js App Router with Cloudflare Workers for global edge delivery
  • Web Audio API engine with sub-20ms latency on modern browsers
  • Web MIDI API integration for hardware controller support
  • Fully accessible: keyboard-navigable player, ARIA labels throughout