Free Online Ukulele Tuner
Play a string, see exactly how in tune you are.
A simplified preview of what the Tunable app does. Get the full app
Left to right in playing order: 4th string (the high G, nearest your chin) to 1st. Standard ukulele tuning is re-entrant, so the 4th string is not the lowest note.
Allow microphone access to begin
How to use this tuner
Click Start Tuning and allow microphone access. Play a string, the tuner detects pitch in real time and shows how sharp or flat you are in cents.
The bar spans −50 to +50 cents. Zero is perfectly in tune. The history line shows where you’ve been, useful for watching new strings settle after you pluck them.
The tuner reads against the nearest open string of Standard GCEA tuning (G4, C4, E4, A4), so the cents value is the distance to that string, not to the nearest chromatic note. Tap a string to hear its reference pitch and lock the tuner to it; tap again to release.
Ukulele is set by default. Use the dropdown to switch to another instrument if needed, note names automatically adjust.
Default is A440. Tap + / − to match your ensemble, A441–442 is common in orchestras, A415 for historical pitch.
Standard ukulele tuning is G4, C4, E4, A4, and the high G is one of the things that gives the ukulele its bright, distinctive character. Unlike a guitar, the strings don’t ascend in pitch from low to high: the G string sits higher than the C and E strings below it, a feature called re-entrant tuning. Some players prefer a low-G string (tuned to G3) for a fuller, guitar-like range, if you’ve switched to low-G, just tune the G string down an octave from where the tuner expects it. Ukulele strings, especially nylon and fluorocarbon, stretch significantly when new. If you’ve just restrung, tune to pitch, play for a few minutes, and re-tune several times until the strings stop drifting. The pitch history display makes this easy to track, a stable horizontal line means the string has settled.
Want the complete experience?
The Tunable app adds 15+ tuning temperaments, metronome, tone generator, recording, ear training, and more, all on your phone.
