Tune by ear or by mic — guitar, bass, ukulele and violin, with cent-accurate readout.
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Press Start to listen
Strings — tap to hear the reference pitch
Play one string at a time, close to the mic, and let it ring. Nothing is recorded or uploaded.
This tuner listens through your device's microphone and tells you exactly which note you played and how far it is from where it should be, measured in cents. Pluck a string and the needle swings: left means flat and you need to tighten, right means sharp and you need to loosen, and the display turns green once you hold the note within five cents of true. It detects which string you are playing automatically, so you can work through all six without touching the screen.
It handles far more than a six-string in standard tuning. Drop D, half-step down, Open G and DADGAD are built in, along with bass, ukulele and violin, and the reference pitch is adjustable from 415 to 466 Hz for ensembles that do not tune to A=440. If you prefer to tune by ear, tap any string to hear a clean reference tone. Everything runs locally — the microphone signal is analysed in your browser and never recorded or uploaded.