How the tuner works
Click Enable microphone and allow access. Play a single note clearly — the tuner shows the nearest note, the exact frequency, and how many cents you are sharp or flat. Aim for the centre line; within +/- 5 cents counts as in tune.
Standard tuning reference
- Guitar: E2, A2, D3, G3, B3, E4
- Bass: E1, A1, D2, G2
- Ukulele: G4, C4, E4, A4
Detection runs entirely in your browser — your audio is never uploaded to any server.