Online chromatic tuner
Tune one note at a time with microphone pitch detection, cents display and an adjustable A4 reference.
—
Play a sustained single note
Listening begins after microphone permission
How to use
- Set A4 reference and allow microphone access.
- Play a single sustained note in a quiet space.
- Adjust toward zero cents and stop the microphone when done.
Before you start
Microphone permission and HTTPS required. Audio is analyzed locally, never recorded or uploaded. Single sustained notes, roughly 65–1,000 Hz; noise and harmonics can confuse detection. Stops when hidden.