Online guitar tuner

Play a string and the tuner shows the note and how many cents sharp or flat you are. It follows the instrument and tuning you pick, including drop D, DADGAD and open tunings, and can switch to chromatic mode for anything else. No microphone? Tap a string to hear a reference tone and tune by ear.

How to use it

1. Press Start and allow microphone access.
2. Play one open string and let it ring.
3. Turn the peg until the needle sits in the center and the note turns green.
4. Move to the next string. Retune the first one once more at the end.

Questions

Why does the tuner need my microphone?

It listens to your instrument to detect the pitch. The sound is analyzed on your device and never recorded or sent anywhere.

Can I tune to drop D or open G?

Yes. Pick a tuning on the tuner page or in Settings and the target notes change to match.

Can I change the reference pitch?

Yes. Set A4 anywhere from 430 to 450 Hz.

Also try: Metronome · Chord Charts · Note Finder

Tunings

Drop D · Half step down · Whole step down · DADGAD · Open G · Open D · Open E · Drop C · Bass · Drop D bass · 5-string bass · Ukulele · Low G ukulele · Baritone ukulele