This free online ukulele tuner lets you tune your uke right in your browser, with no app to download and nothing to install. Allow microphone access, pluck a string, and the tuner listens and tells you whether the note is flat, sharp, or right on target.
No mic handy? Tap the reference tones to tune by ear instead. It works on phone, tablet, and desktop, and it’s set to standard G-C-E-A tuning by default.
Works best in a quiet room. On phones, tap “Start Tuner” and allow microphone access when asked. No mic? Tap G, C, E, or A above and match your string by ear.
How to use this online ukulele tuner
Using the tuner takes less than a minute. Sit somewhere quiet so the microphone can hear the strings, then follow these steps:
- Tap Start and allow microphone access when your browser asks.
- Pluck a single string and let it ring out.
- Watch the note name and the needle, then turn the tuning peg until it shows the target note and the needle sits in the center.
- Repeat for all four strings: G, C, E, and A.
Tip: if the microphone isn't picking up your uke, use the clickable reference tones instead and match each string to the sound by ear.
The four ukulele strings: G-C-E-A
A standard ukulele has four strings tuned to G, C, E, and A. Held in playing position, they run G-C-E-A from the top string (closest to your face) down to the bottom. A classic way to remember them is the little sung phrase "My dog has fleas." If you want the full walkthrough, see our complete guide on how to tune a ukulele.
| String | Note | Position |
|---|---|---|
| 4th (top) | G | Closest to your face |
| 3rd | C | Second from the top |
| 2nd | E | Third from the top |
| 1st (bottom) | A | Closest to the floor |
High-G vs low-G
Most ukuleles use high-G (re-entrant) tuning, where the top G string is pitched higher than the C and E next to it, and that's what gives the uke its bright, jumpy sound. Some players prefer low-G, which swaps in a thicker string an octave down for a fuller range; both use the same G-C-E-A note names, so this tuner works for either.
No microphone? Tune with reference tones or a tuning app
You don't need a mic to use this page. Tap each reference tone in the tool to play a clean G, C, E, or A, then adjust your string until it matches the pitch. This is the same idea behind a ukulele tuning app, a reliable reference note you tune against, except it runs free in your browser with nothing to install. A clip-on tuner that clamps to the headstock is the other great option, since it senses vibration and works even in a noisy room.
A note on baritone ukuleles
This tuner is set for the standard G-C-E-A tuning used by soprano, concert, and tenor ukuleles. The larger baritone is the exception, tuned D-G-B-E, like the top four strings of a guitar. Not sure which size you have? See our guide to the different types of ukuleles.
Troubleshooting
- The tuner isn't hearing my ukulele. Check that you allowed microphone access, that no other app is using the mic, and that you're in a quiet spot. On phones, make sure the browser has mic permission in your settings.
- My string won't hold its pitch. Brand-new strings stretch for the first few days, so tune, play a little, and re-tune. This settles down within a week.
- The reading keeps jumping around. Background noise or plucking too hard can confuse the mic. Give it one gentle pluck and let the note ring.
Frequently asked questions
Can I tune a ukulele without a mic?
Yes. Use the clickable reference tones in the tuner to play each target note (G, C, E, A) and adjust your string until it matches by ear. The microphone only adds automatic detection; it isn't required.
What are the four ukulele strings tuned to?
Standard soprano, concert, and tenor ukuleles are tuned to G-C-E-A, from the top string down to the bottom. Baritone ukuleles are tuned D-G-B-E.
Is an online ukulele tuner accurate?
A browser tuner using your device's microphone is accurate enough for everyday playing and practice. For the most precise results, tune in a quiet room and give each string a clean pluck so the tuner reads a steady pitch.
Does this ukulele tuner work on my phone?
Yes. It runs in any modern mobile or desktop browser. On a phone, allow microphone access when prompted and it works the same as on a computer.