Tune a ukulele in your browser

A free ukulele tuner for standard GCEA. It listens on your microphone, shows the note and the cents, and nothing is uploaded.

  • No upload
  • Free, no sign-up
  • Runs on your device
  • Works offline

How to tune a ukulele in your browser

  1. 1

    Allow the microphone

    Tap Listen. Pitch is measured here. The recording is not uploaded.

  2. 2

    Pluck G, C, E, then A

    One string at a time. The matching target lights up when you are close.

  3. 3

    Centre the needle

    Tune until the cents are near zero, then strum and fix any string that moved.

Standard ukulele tuning is GCEA

Soprano, concert and tenor ukuleles almost always use G, C, E, A. This page opens on those four notes. The G is the high re-entrant G4, above the C, which is what most ukuleles ship with.

A low G is G3, an octave down. Chromatic mode will show that octave if your ukulele has one. The cents work the same way.

GCEA frequencies at A4 = 440

Baritone ukuleles are usually D, G, B, E, the same notes as the top four strings of a guitar. Use Guitar mode or Chromatic for those.

StringNoteHz at 440
4th, closest to your faceG4392.00
3rdC4261.63
2ndE4329.63
1stA4440.00

High G and low G

Re-entrant tuning puts the G above the C, so a strum has that bright top note. Linear tuning puts the G below the C. Both are called G. The tuner shows the octave, so G4 means the high string and G3 means the low one.

Tune the C, E and A first. They are the same in both setups. Then bring the G to the octave you want.

Small strings move a lot

Ukulele strings stretch, especially when they are new. Tune, play for a minute, and tune again. Pulling a string sharp and then easing down helps it hold.

Hold the uke still and pluck gently. A wild strum feeds the mic several notes and the name will flicker.

Questions

What tuning does this ukulele tuner use?

G4, C4, E4, A4. That is standard soprano, concert and tenor tuning, with the high G.

Does it upload audio from the microphone?

No. Nothing is recorded or uploaded. The pitch is measured in your browser.

Can I tune a baritone ukulele?

Yes, in Guitar or Chromatic mode. Baritone is D G B E, not GCEA.

My G reads an octave lower. Is that wrong?

Only if you wanted the high G. A low-G string is supposed to read G3. G4 is the re-entrant high G.

Can I set A4 to 432?

Yes. 440 and 432 are both one tap, and you can type any A4 from 415 to 466.

Will it work on a phone?

Yes. Allow the microphone. The note is large enough to see while you turn a tuner peg.