Free · Music and sound

Piano Note Frequency Finder

Tap any piano key to see its note name and frequency in hertz.

  • Clear, kid-friendly steps
  • Private in your browser
  • No signup

Play music

Tap or type a key

Play a keyThe number will appear here

Powered by Qwerty Hancock, an open-source library available under MIT.

Three simple steps

How to use it

  1. Pick a sound or tap a piano key.
  2. Listen, play, and try a different choice.
  3. Save a sound when the tool offers a download.

Private by default

Your words and choices stay in this browser tab. There are no accounts, uploads, ads, or trackers inside the tool. Close the tab and the working data is gone.