Grand Piano

About

Grand Piano is a browser-based piano extension that brings a fully playable two-octave keyboard directly into your toolbar. It supports both mouse interaction and keyboard input, with intuitive mappings for white keys (A S D F G H J) and black keys (W E T Y U). Users can customize sound output through waveform selection, reverb control, and octave shifting.

The extension includes a library of 20+ built-in songs that play automatically while visually highlighting the corresponding keys in real time. A live waveform visualizer provides immediate feedback for every note, making it both an interactive and educational experience.

Included songs:
Für Elise
Tetris Theme
Bohemian Rhapsody
Super Mario
Imagine
Moonlight Sonata
14 more....

Designed for music enthusiasts of all levels

🎹 Instant melody learning
Songs play with synchronized key highlights, allowing users to intuitively learn melodies without relying on sheet music.

🎵 Quick creative breaks
Accessible in a single click, the extension provides a lightweight way to engage with music without launching separate applications or creating accounts.

⚡ Offline functionality
All assets and songs are embedded within the extension, ensuring full functionality without internet access, external APIs, or subscriptions.

🎛️ Advanced sound controls
Supports multiple waveforms (Triangle, Sine, Sawtooth), along with adjustable reverb, volume, and playback speed—enabling users to shape their sound output.

🎮 Diverse music library
Combines classical compositions (Beethoven, Mozart) with modern content such as game themes, pop songs, and rock riffs.

🔒 Privacy-first design
Operates entirely locally with zero data collection, no analytics, no tracking, and no external network requests.

Song library
20 songs, ready to play