Grand Piano

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