Piano Tone Generator Online — Free Virtual Piano Notes (C2–B6)
A clickable online piano tone generator — play any note from C2 to B6 instantly in your browser. Switch tone colour, change octave, no install needed.
Equal-temperament tuning, A4 = 440 Hz. Each note plays a short envelope (attack 10 ms, release 1.5 s).
What is a Piano Tone Generator?
A piano tone generator is a software tool that produces the precise frequencies of piano keys on demand. Where a real piano uses felt-tipped hammers striking strings, our tool uses pure mathematical oscillators tuned to equal temperament with A4 = 440 Hz, the universal tuning standard.
You get a clickable 12-note keyboard plus an octave selector (C2 through B6), letting you play any note across the central five-octave range of a piano. Switch between sine, triangle, sawtooth, and square tone colours to compare how piano frequencies sound on different waveforms.
Features
12 Notes × 5 Octaves
C2 through B6 — covers the most-used range of a real piano keyboard.
Equal Temperament
A4 = 440 Hz, ratio of 2^(1/12) between semitones. Standard tuning, perfect precision.
Four Tone Colours
Switch between sine, triangle, sawtooth, square to colour the notes differently.
Real Envelope
Each note has a fast attack and natural decay — feels musical, not robotic.
Touch Friendly
Tap notes on any phone or tablet — the keyboard scales to your screen.
Safe & Smooth
Soft note attack prevents speaker pops. Notes auto-fade to avoid stuck tones.
Common Uses
Practice interval recognition and pitch matching with a known-pitch reference.
Audition note ideas instantly without booting a DAW or plugging in a MIDI keyboard.
Singers can use the tones to find starting pitches before warming up.
Quickly check what frequency in Hz corresponds to a specific musical note.
How to Use
1. Choose Waveform
Pick sine, square, sawtooth, or triangle depending on the tone character you need.
2. Set Frequency
Use the slider or tap a preset to dial the exact frequency you need.
3. Adjust Volume
Start at low volume — pure tones can be louder than they feel.
4. Press Play
Hit Play and the tone keeps playing continuously until stopped.
Frequently Asked Questions
Equal temperament with A4 = 440 Hz, the international standard. Each semitone is a frequency ratio of 2^(1/12) ≈ 1.05946.
Middle C is C4 in scientific pitch notation, with a frequency of approximately 261.63 Hz. Select octave 4 and click C.
A real piano has rich harmonic content from string + soundboard + hammer interaction. This tool produces pure waveforms — perfect for tuning reference but not realistic piano sampling.
Currently only one note plays at a time — clicking a new key cuts off the previous one. A polyphonic version is on the roadmap.
Not yet — the current version is click/tap only. We are evaluating Web MIDI for a future version.
Listening Safety
Use comfortable volume — high notes at high volume can be fatiguing. Take breaks during long ear-training sessions.