Open C Ukulele Tuner
Tuner
Ukulele Open C (G C E G) • 4 strings • 440 Hz
Detected
Target
392.0 Hz
Select String
Ready to tune?
Click "Start Listening" and select a string to tune. Auto-detect is assist-only and works best when the string is already close to pitch.
Tune the fourth through first strings to G4 C4 E4 G4. Together they form a C major chord. From standard high-G tuning, leave G4 C4 E4 unchanged and lower only A4 to G4.
Note Layout
Notation
G4 C4 E4 G4
How to Tune
Click "Start Listening"
Allow microphone access when prompted.
Play Each String
Auto-detect will find the string, or click to select manually.
Adjust Until Green
Center the needle and watch for the green "In Tune" indicator.
Tune Open C cleanly
Mute the other strings while the tuner listens
Approach the first-string G4 from below
Recheck both G4 strings after the first pass
Strum softly to confirm a clear C major chord
About Open C ukulele tuning
History & context
Open C is the smallest move from high-G standard among these presets: only the first string changes. A full barre moves the same major-chord voicing up the neck.