WATAR
Ukulele Tuner
Free ukulele tuner for standard reentrant GCEA tuning (soprano/concert) — right in your browser.
Tune your ukulele online
Your microphone audio is analyzed live in your browser using the Web Audio API and is never recorded, saved, or sent anywhere — the same on-device-only approach the Watar app itself uses. Requires a secure (https) connection; works in current Chrome, Safari, Firefox, and Edge.
Standard Ukulele tuning
| String | Note | Frequency |
|---|---|---|
| 4 (G, reentrant) | G4 | 392.00 Hz |
| 3 | C4 | 261.63 Hz |
| 2 | E4 | 329.63 Hz |
| 1 (A) | A4 | 440.00 Hz |
● Standard "My Dog Has Fleas" tuning is reentrant — the G string is tuned higher than the C string, not lower.
● Baritone ukuleles use DGBE instead (same as the top 4 guitar strings) — use the custom tuner for that.
● Nylon/fluorocarbon strings stretch a lot when new; expect frequent retuning for the first few days.
Frequently asked questions
- What is standard ukulele tuning?
- Standard soprano/concert ukulele tuning is G4 C4 E4 A4, with the G string reentrant (tuned higher than the C string below it).
- Is tenor ukulele tuning different?
- Tenor ukuleles usually use the same GCEA tuning, though some players choose a low-G (linear) variant where the G string drops an octave. The Watar app supports both high-G and low-G.
- What about baritone ukulele?
- Baritone ukulele is tuned DGBE, the same notes as a guitar's top four strings. Use Watar's custom tuning slot or the custom tuner on this site for that.
Get the full Watar app
The browser tuner above is free and always will be — no install needed. For practice mode, drone/reference tones, auto string detection, a metronome, and offline use, install the Watar app.
Tune another instrument
Playing something else? Watar's app supports 11 instruments and 30+ tuning styles, including a fully custom slot for anything not listed. Set up a custom tuning →