• 🎸 Online Ukulele Tuner

    Tune your ukulele online using your device's microphone. Choose your ukulele tuning, pluck one string at a time, and see whether the detected pitch is flat, sharp, or in tune.
    Standard G-C-E-A uses a high G string. Low-G tuning replaces it with a lower G.
    440 Hz is the most common modern reference pitch.
    Open Strings
    Click a string to make it the selected target. The microphone tuner can still identify the nearest musical note automatically.
    Select a string or simply start the tuner and pluck one open ukulele string.
    Detected Note
    —
    — Hz
    Target: —
    Waiting for a string
    −50¢ Flat In Tune +50¢ Sharp
    0 cents
    Ukulele Reference Tones
    Press a note to hear the target pitch for that open string.
    Microphone Note: Live tuning requires microphone permission in your browser. For more stable detection, tune in a quiet room and pluck one string at a time. Other instruments, background music, speech, and excessive noise can interfere with pitch detection.
    How does the Online Ukulele Tuner work?

    The tuner listens to your ukulele through the microphone and estimates the fundamental frequency of the string. It compares that frequency with equal-tempered musical notes using your selected concert-pitch reference.

    The tuning meter displays the pitch difference in cents. Negative values indicate a flat pitch and positive values indicate a sharp pitch.
    Tip: Tune gradually and check each string again after you finish all four. Changing the tension of one ukulele string can slightly affect the tuning of the others, especially after installing new strings.

  • An Online Ukulele Tuner lets you tune your ukulele directly through your device's microphone. Choose your preferred ukulele tuning, pluck one open string at a time, and the tuner will detect the pitch, identify the nearest musical note, and show whether the string is flat, sharp, or in tune.

    The tuner supports several useful ukulele tunings, including Standard G–C–E–A, Low-G G–C–E–A, Baritone D–G–B–E, and D-Tuning A–D–F♯–B.

    Standard Ukulele Tuning

    The most familiar tuning for soprano, concert, and tenor ukuleles is:

    G4 – C4 – E4 – A4

    Standard ukulele tuning is unusual because the G string is commonly tuned higher than the C and E strings. This is known as reentrant tuning.

    The open-string pitches at A4 = 440 Hz are approximately:

    G4 = 392.00 Hz
    C4 = 261.63 Hz
    E4 = 329.63 Hz
    A4 = 440.00 Hz

    Low-G Ukulele Tuning

    A Low-G ukulele uses G3 instead of the higher G4 found in traditional reentrant tuning.

    The strings are:

    G3 – C4 – E4 – A4

    Low-G tuning creates a more linear pitch arrangement and extends the instrument's lower range. It is popular with players who want additional bass notes for melodies, fingerstyle arrangements, and chord voicings.

    Baritone Ukulele Tuning

    Baritone ukuleles are commonly tuned:

    D3 – G3 – B3 – E4

    This is the same pitch arrangement as the four highest-pitched strings of standard guitar tuning.

    Make sure you select Baritone before tuning a baritone ukulele because its intended open-string pitches are different from standard G–C–E–A ukulele tuning.

    How to Use the Ukulele Tuner

    Select your tuning and press Start Microphone Tuner. Allow microphone access when your browser asks for permission.

    Pluck one open string and let it ring clearly.

    The tuner displays the detected note, frequency in Hertz (Hz), and the difference between your pitch and the nearest equal-tempered note in cents.

    If the display says Flat, gradually tighten the string to raise its pitch.

    If it says Sharp, gradually loosen the string to lower its pitch.

    When the detected pitch is within approximately ±5 cents, the tuner displays In Tune.

    What Are Cents?

    A cent is a small measurement of musical pitch. There are 100 cents in one equal-tempered semitone.

    A reading of −12 cents, for example, means the string is slightly flat. A reading of +12 cents means it is slightly sharp.

    The closer the reading gets to 0 cents, the closer the string is to the target pitch.

    Use the Reference Tones

    You can also press one of the reference-tone buttons to hear the correct pitch for each open string.

    Try listening to the reference pitch and then matching it on your ukulele. This can help develop your ear while still giving you access to the visual tuner when you need confirmation.

    Keep your device's playback volume at a comfortable level when using reference tones.

    Why Does My Ukulele Keep Going Out of Tune?

    Ukulele strings can change pitch as they stretch, particularly when they are new.

    New strings may need to be tuned repeatedly before they become more stable. Temperature, humidity, playing pressure, string condition, tuning machines, and the instrument itself can also affect tuning stability.

    Changing the tension of one string can sometimes cause a small change in the others, so it is useful to check all four strings again after completing your first tuning pass.

    Don't Tighten the Wrong String Too Far

    When a string is significantly out of tune, confirm that the tuner is detecting the correct note and octave before continuing to tighten it.

    Blindly increasing tension while aiming for the wrong octave can put unnecessary stress on the string and instrument and may cause the string to break.

    Tip: Tune up to the target pitch gradually instead of making large tuning-peg movements. After tuning all four strings, play a few chords and check each open string again. If you just installed new strings, expect to repeat the tuning process several times while the strings settle and stretch.

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