Runs in your browser. Nothing is uploaded.
Online Tuner
Tune a guitar, bass, or ukulele from the microphone. Pluck one string and watch the cents.
Instrument
440 Hz
Pluck one string at a time in a quiet room and let it ring.
—
0.0 Hz
Press startNearest string
—
Cents
—
More tests
What it measures
Note
The nearest note to the pitch the microphone hears.
Cents
How far that pitch sits from the target string. Zero is in tune.
Questions
Which instruments are included?
Standard guitar, bass, and ukulele tunings. The reference pitch defaults to A4 at 440 Hz and can be moved.
Why does the needle jump?
Room noise and a quiet string make the pitch hard to lock. Play one string close to the microphone.