Tuner

A free online tuner: it listens through your microphone, finds the note and shows how many cents flat or sharp. Guitar, bass, ukulele, violin and more, alternate tunings, reference tones. The sound never leaves your device.

Instrument and tuningReference pitch A4 (Hz)

–Turn the microphone on and play a note

Waiting for a note.

The microphone is used only to find the pitch, on this device. Nothing is recorded or sent.

Strings and reference tones

Any note (pitch pipe)Octave

The usual reference is A4 = 440 Hz; change it above for other pitch standards. Press a string to hear its note and tune to it by ear. The tuner picks the nearest string by itself and shows how far off you are; within 5 cents is in tune.

Free, no account, no ads. Made in your browser: nothing leaves your device. Works offline.