Harmonica tuner

Play a hole and see which hole and note it is on your harp, and how many cents sharp or flat. Nothing is recorded: the sound stays in your browser.

Preview

4 blow

C5 · 525.1 Hz

In tune · +6 cents

  • Play one hole at a time, softly and steady; a quiet room helps.
  • Most harmonicas are tuned a little sharp (a few cents), so a small + is normal.
  • Pick the key printed on your harmonica: the same hole is a different note on each key.