Free Online Ukulele Tuner
Play a string — see exactly how in tune you are.
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.
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.
