Ukulele Tuner Online
Get all four strings to G C E A using just your microphone — pluck a string, follow the tighten-or-loosen hint, and watch the checks add up. Free, beginner-friendly, nothing recorded.
Tap a peg to hear its note and start tuning — the browser will ask for mic access once. Sound is analyzed on your device, never uploaded.
How to Tune a Ukulele Online
Four strings, four green checks, under a minute.
Let the Mic Listen
Press Tune my ukulele and allow microphone access when your browser asks. Everything stays on your device.
Pluck a Single String
Play one string on its own and let the note ring. The tuner names the string and shows how close it is.
Turn Gently to Green
Follow the tighten / loosen hint with small turns — uke pegs move pitch fast. Green needle, short hold, check mark. Do all four and strum.
Made for First-Week Players Too
It names the string, says which way to turn, and keeps score for you.
It Knows Which String You Plucked
Play any of the four strings and the tuner names it for you — no guessing whether that was the C or the E. Want to focus on one? Tap its peg to lock it.
Tighten or Loosen, in Plain Words
Instead of making you read a dial, the tuner simply says which way to turn. When the string lands within 5 cents of its note, everything goes green.
Four Checks and You're Done
G, C, E, A — each string earns a check mark on its peg as it lands, so you can see at a glance which ones still need a turn.
Hear Each Note First
Every peg can play the exact pitch its string should make. Listen, match it by ear, and let the needle confirm — a gentle way to start training your ear.
Your Mic Stays Private
Sound is analyzed on your device the instant it arrives, then discarded. Nothing is saved or sent anywhere — this is a tuner, not a recorder.
Tune from Any Phone
Beach, classroom, campfire, couch — open the page on iOS or Android, allow the mic, and tune. No app to install.
It Listens, It Never Keeps
Each slice of microphone sound is measured on your own device and immediately discarded. Nothing is recorded, nothing leaves your browser, and pressing Stop cuts the mic off instantly.
No Recording
Frames are analyzed and discarded
No Upload
The analysis runs in your browser
You're in Control
Stop ends mic access instantly
Wherever the Uke Comes Out
Small instrument, travels everywhere, drifts out of tune everywhere too.
Soprano, Concert & Tenor
All three sizes use the same G C E A — one tuner covers them all
Your First Ukulele
Plain tighten/loosen directions, no music theory required
Fresh Nylon Strings
New strings stretch for days — quick retunes keep them honest
Uke Clubs & Classrooms
Get a whole room to the same four notes before the strumming starts
Before You Record
A minute of tuning is the cheapest upgrade any uke cover can get
Ear Practice
Play the reference tone, match it by ear, then peek at the needle
G C E A — and Why the G Is the Odd One Out
A standard ukulele tunes to G4 C4 E4 A4, referenced to A4 at 440 Hz, and that holds across soprano, concert, and tenor sizes — one set of notes for almost every uke you’ll meet. The lowest note is actually the C in the middle at 261.6 Hz (middle C on a piano), and the whole instrument lives in a bright, compact range less than an octave wide. This tuner listens for those four notes, names the string you plucked, and steers each one home.
Reentrant tuning: the “backwards” string that isn’t broken
Here’s the thing that puzzles nearly every new player: the string closest to your face — the G — sounds higherthan the C right below it. That’s called reentrant tuning, and it’s on purpose. Instead of running low-to-high like a guitar, the ukulele doubles back with a high G4, which is exactly what makes strums sound so light and chimey. So when the tuner asks you to bring that G up near the top of the range, trust it — your ukulele isn’t strung wrong, and neither is the tuner.
New nylon strings will drift — that’s normal
Nylon stretches far more than steel, so a fresh ukulele (or a fresh set of strings) can slip noticeably flat within hours. It isn’t a defect; the strings simply need a week or two of playing to settle. The fix is cheap: retune every single time you pick the uke up, and give each string a gentle pull away from the fretboard before you do. Because a tune-up here takes well under a minute, the stretch period becomes a non-event instead of a mystery.
Getting a clean reading from a small instrument
Pluck one string at a time and let it ring — a strummed chord carries four pitches at once and can’t be tracked. Ukulele notes also fade quickly, so if the needle drops out, just pluck again rather than turning blind. Each peg can play its reference tone too, which is a lovely way to learn what “in tune” sounds like: listen, hum along, match the string by ear, then let the needle grade you. Curious about pitch beyond these four notes? The note identifier names anything you play or sing.
One tuner family, many instruments
If a baritone uke joins the family, its D G B E strings match a guitar’s top four — the guitar tuner has you covered until a baritone preset arrives. The same engine also tunes banjo, mandolin, bass, and violin — and once everything rings true, the online audio editor is ready to record the results.
Four Green Checks? Press Record
The full Notevibes Online Audio Editor records your strumming, cleans up room noise, detects key and tempo, and exports to MP3 or WAV — all in your browser.
Free to try · No credit card required
Related Audio Tools
More free AI audio tools from Notevibes — same engine, no sign-up.
Guitar Tuner
Tune all six strings with your mic — auto string detection.
Banjo Tuner
Tune a 5-string banjo to open G with your mic.
Mandolin Tuner
Tune all four string pairs to G D A E.
Bass Tuner
Tune a 4-string bass (E A D G) with your mic.
Pitch Detector
Read the live pitch of any sound — Hz, note, and cents.
Note Identifier
Sing or play a note and see its name instantly.
Ukulele Tuner FAQ
How do I tune my ukulele with this online tuner?
Press the button, allow microphone access, and pluck one string. The tuner works out which of the four it is, shows how far off it sits, and says whether to tighten or loosen. Turn gently until the needle centers and goes green, hold it a second, and that string gets a check. Four checks and the uke is ready.
What tuning does it use?
Standard ukulele tuning — G4 C4 E4 A4, referenced to A4 = 440 Hz. It's the same G C E A whether you play a soprano, concert, or tenor ukulele, so this one tuner covers all three sizes.
Why does the G string sound higher than the C string?
That's reentrant tuning, and it's correct. On a standard ukulele the G string is a high G4 — pitched above the C4 sitting right next to it. It surprises almost every beginner, but it's what gives the ukulele its bright, bouncy sound. Nothing is wrong with your instrument.
Does it cover baritone ukuleles?
Not as a preset yet — baritones use D G B E instead of G C E A. Those four notes happen to match a guitar's top four strings, so for now tune a baritone by ear against the D, G, B, and E reference tones on our guitar tuner.
Why does my new ukulele keep going out of tune?
Nylon strings stretch, a lot, for the first week or two of playing. A brand-new uke drifting flat every day is completely normal. Retune each time you pick it up — it takes under a minute here — and gently pre-stretching the strings with your thumb speeds up the settling.
Is anything recorded or uploaded?
No. Your sound is analyzed on your own device in real time and thrown away frame by frame — nothing is recorded, stored, or sent anywhere, and the mic turns off the moment you press Stop.
Is it free?
Completely free — no account, no app, no limits. It runs in your browser and only asks for microphone permission, which you can take back whenever you like.