Online Tuner
Tune your instrument with the microphone on your computer or phone. Pick guitar, bass, ukulele or violin, or use chromatic mode for any instrument or your voice.
How it works
- 1Press Start and allow microphone access.
- 2Choose your instrument and play one string or note at a time.
- 3Tighten or loosen until the needle sits in the center zone.
How to read the tuner
The big letter is the note the tuner hears. The needle shows how far off it is, in cents, from 50 flat on the left to 50 sharp on the right. When the needle is in the shaded zone in the middle, the note is within 5 cents and in tune. With an instrument selected, the tuner also highlights the string you're closest to, so you know which peg to turn.
Tunings included
Guitar in standard tuning (EADGBE) and drop D (DADGBE), 4-string bass (EADG), ukulele (GCEA, with the high G) and violin (GDAE). Chromatic mode shows the nearest note for anything else: mandolin, cello, horns, flute or singing. Tap a string button to hear its reference pitch if you prefer to tune by ear.
Tips for tuning accurately
Always tune up to a note. If a string is sharp, loosen it below the target and then bring it back up, so the gear holds tension and the string stays in tune. Tune in a quiet room, and give new strings a few rounds of tuning, since they stretch for the first day or two.
Electric guitars and basses tune most reliably with the neck pickup and the tone knob turned down, which removes the bright overtones a microphone can latch on to. For bass, play the note at the 12th fret if the open string is too low for your laptop mic to pick up cleanly.
Private and offline-friendly
Pitch detection runs on your device. The microphone signal is never recorded or uploaded, and once the page has loaded the tuner keeps working without a connection.