Interactive Ukulele Tuner

Why You Need a Tuner You Can Trust

You grab your uke, strum a breezy, happy C chord, and it sounds like a dying goose because your A-string slipped. Ukuleles are notoriously finicky instruments—nylon strings love to stretch, and a slight change in room humidity can throw your tuning off in minutes.

If you’re jamming at a campfire, tracking a quirky indie pop song in the studio, or just woodshedding in your bedroom, you need a tuner that’s fast, stable, and accurate. We built this browser-based tool to give you the exact same algorithm precision as a high-end digital pedal, without making you download a bloated app to your phone.

How to Get in Tune (The Right Way)

1. Let Us Hear It: Click "Allow" on the mic prompt. Your raw audio never leaves your device—it's processed entirely in your browser's local memory.
2. Pick Your Profile: We default to Standard (High-G), but you can easily swap to Low-G if you like a meatier sound, or Baritone (DGBE) if you're playing the big boy.
3. Pluck One String: Hit it cleanly with your thumb. (Pro tip: if the needle is jumping around crazily, rest your palm across the other three strings to mute them. Sometimes sympathetic vibrations can confuse the mic).
4. Follow the Needle:
   • If it leans left into the red, you're flat. Turn the peg to tighten the string.
   • If it leans right, you're sharp. Crucial rule: drop the string flat first, then slowly tighten it back up to pitch. This removes slack from the tuning gears so the string won't slip flat five minutes later.
   • When the needle locks dead center on teal, you're golden.

Why is the Top String So High? (The GCEA Mystery)

Ukuleles are totally weird because of "re-entrant" tuning. Unlike a guitar where the strings go from lowest to highest pitch in order, a standard soprano or concert ukulele’s 4th string (the G) is actually tuned higher than the 3rd string (C). That close-voicing is exactly what gives the uke its signature bouncy, cheerful sound.

Here are the exact frequencies you are aiming for:

String	Note	Target Frequency
4 (Top)	G4	392.00 Hz
3	C4	261.63 Hz
2	E4	329.63 Hz
1 (Bottom)	A4	440.00 Hz

Our algorithm tracks your pitch down to a single "cent" (a micro-measurement of pitch). This completely eliminates that awful wobbly, out-of-phase beating sound you get when you try to tune purely by ear in a noisy room.

Why Won't My Uke Stay in Tune?

This is the #1 complaint from new ukulele players. If your uke refuses to hold its tuning, here’s what’s likely happening:

• Brand New Strings: Nylon and fluorocarbon strings are incredibly stretchy. If you just bought your uke or threw a fresh set of strings on, they will constantly go flat. You literally have to gently pull and stretch the strings away from the soundhole with your fingers, retune, and repeat this for a few days until they finally settle in.
• Friction Pegs Slipping: A lot of traditional ukuleles use friction pegs (the tuning keys that stick straight back out of the headstock) instead of modern geared tuners. If your string drops flat the second you let go of the peg, grab a tiny Phillips-head screwdriver and tighten the screw on the back of the peg. Don't crank it—just snug it up enough to add friction.
• Bad Intonation: If you tune your uke perfectly open, but your chords sound like absolute garbage when you play up on the 5th fret, your intonation is shot. This usually means your strings are completely worn out and have lost their mass consistency, or your bridge saddle is cut poorly. Always try throwing a fresh set of high-quality strings on it before taking it to a luthier.