Online Piano

📖 Tool Introduction

The Online Piano is a completely free, instant-response virtual keyboard that runs in your browser, great for music first steps, quick improvisation, melody sketching and casual rhythm games. It faithfully reproduces the layout of two octaves from C4 to B5: fourteen white keys arranged in the familiar C-to-B pattern, with ten black keys placed in the standard five-per-octave grouping, so every sharp and flat sits exactly where it would on a real piano. Each note is synthesized live by a Web Audio oscillator using exact equal-temperament frequencies, and a short attack plus a smooth release envelope shapes the sound so it feels like pressing a real key, with no sampled audio files to load. You can play by clicking keys with the mouse, or by typing on your computer keyboard: the white keys map to A S D F G H J K L semicolon Z X C V, and the black keys map to W E T Y U O P [ ] backslash, letting both hands span two octaves naturally. Four timbres are available, soft triangle, pure sine, electronic square and bright sawtooth, and a volume slider keeps the listening level comfortable. The Play demo button runs an ascending C major scale automatically so you can quickly anchor your ears to the pitch reference. Because every note is generated locally, the instrument works offline, starts the moment you touch a key, and on phones and tablets you can simply tap the keys, which makes it a light, delightful companion for doodling melodies or training sight-singing whenever an idea strikes, without carrying a real keyboard or installing any application. Because each voice is a pure oscillator with a shaped envelope rather than a recorded sample, two notes can ring out together without buffer limits, so you can hold simple chords and even slow arpeggios to hear basic harmony in action. There is nothing to install, no account to create and no track record to upload, so you can open the page on any machine and immediately try a favorite tune or improvise a new one.

✨ Key Features

• Two-octave keys: C4 to B5, 24 keys with authentic black-white layout
• Dual input: play by mouse click or by computer keyboard
• Four timbres: triangle, sine, square and sawtooth waves
• True tuning: equal temperament frequencies, pitch is accurate
• Touch envelope: fast attack, natural release, feels close to a real key
• Demo tune: one click plays a C major scale to get started

📝 How to Use

1. Pick a waveform in the timbre dropdown and set the volume
2. Click white and black keys with the mouse, or press the mapped letters
3. Sound starts on press and stops on release; press several keys for chords
4. Press Play demo to hear a C major scale as a pitch reference
5. Switch timbres to hear how the same melody changes character

⚠️ Notes

• Unlock audio: browsers require one click first, so press a key once to enable sound
• Keyboard focus: when typing on the keyboard, keep focus off any text input
• Bright waves: square and sawtooth are harmonically rich, lower the volume for long sessions
• Chords: hold several keys at once, but very many may strain resources
• Touch screens: tap keys directly on phones; black keys are small, aim carefully