Online Piano Keyboard
Play a virtual piano directly in your browser. Click on the keys or use your computer keyboard to hear accurate pitches generated with the Web Audio API.
Audio is generated locally on your device with no external audio files and no data sent to any server.
Play piano directly in your browser using Web Audio.
Sound is generated locally in your browser using the Web Audio API. There are no external audio files or network calls, so you can experiment freely without sending any data to a server.
Controls
Keyboard shortcuts
Use your computer keyboard to play notes: A–K for C4–C5, W E T Y U for the black keys. Focus the page and press keys to hear notes.
A browser-based piano for quick ideas and ear training
This online piano keyboard uses the Web Audio API to synthesize notes in real time. Each key is tuned using equal temperament, the same standard used by most modern pianos and digital instruments. The pitches are calculated from MIDI note numbers, with A4 (the concert tuning reference) set to 440 Hz, and the other notes spaced in half-steps according to the standard formula. That means you can rely on this keyboard for basic ear training, songwriting sketches, and music theory practice without worrying about detuning.
Mouse, touch, and QWERTY input
You can play this keyboard by clicking or tapping on the keys, or by using a QWERTY layout for fast input. The A–K keys map to the white notes from C4 up to C5, while W, E, T, Y, and U provide the sharps in between. This mapping makes it easy to play simple melodies with one hand while keeping focus in your browser window. On touch devices, tap the keys directly; the Web Audio engine will still generate the same pitches using your device's audio output.
Above the keyboard you can switch between octave ranges such as C3–C5 or C4–C6, change waveforms (sine, triangle, square, sawtooth), and adjust volume. These options let you move between a round, organ-like sound and a brighter, more cutting tone. Because everything runs in real time, you can tweak settings without restarting playback.
How the Web Audio synthesis works
Under the hood, the tool manages a single AudioContext with a polyphonic set of oscillator nodes. When you press a key, it creates an oscillator at the appropriate frequency for that note and routes it through a gain node that shapes the attack and release. Multiple notes can sound at once, so you can play simple chords as well as melodies. Each oscillator uses the selected waveform type, and a master gain node controls the overall volume. When you release a key, the gain ramps down over a short release time to avoid clicks.
Privacy and offline-friendly design
Like other LifeHackToolbox utilities, this piano keyboard is fully client-side. There are no audio streams or network calls involved in generating sound. As long as your browser supports Web Audio, the tool can run even on slow or offline connections. It is safe to use on shared or work machines because it does not store or transmit any personal data.
You can pair this with other tools on LifeHackToolbox for a broader creative workflow. For example, you might log practice sessions or exercise routines in the Workout Tracker, generate quick QR codes for sharing rehearsal links using the QR Code Generator, or browse fun naming ideas in the Baby Name Generator if you are naming a band or project. All of these tools share the same philosophy: simple, focused, and privacy-first.