Online Guitar Tuner

Tune your guitar by ear or by microphone. Pluck a string and the tuner shows the closest target note and whether you are flat or sharp.

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Press start and play a string
Needs microphone access. Nothing is recorded or uploaded.

Tap a string to hear its reference note:

Standard tuning from the thickest to the thinnest string: E – A – D – G – B – E.

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How to use the tuner

  1. Press Start tuner and allow microphone access.
  2. Pluck one open string and let it ring.
  3. If the needle is left of centre, the string is flat: tighten it. If it is right, the string is sharp: loosen it.
  4. When it shows In tune, move to the next string, then check them all again.

Tuner for other tunings

Drop D TuningDADGAD TuningOpen G TuningOpen D TuningOpen E TuningOpen A TuningHalf Step Down TuningFull Step Down TuningDrop C TuningDouble Drop D TuningOpen C Tuning

Tuner FAQ

How does an online guitar tuner work?

It uses your device microphone to listen to the pitch of the string you play, measures its frequency and shows how many cents sharp or flat it is compared to the target note.

What are the standard guitar tuning notes?

E – A – D – G – B – E, from the thickest to the thinnest string.

Is the online tuner free and private?

Yes. It runs completely in your browser. Audio is analysed on your device and is never recorded or uploaded.

Why does my tuner not pick up my guitar?

Allow microphone access, play one string at a time in a quiet room and hold the guitar close to the microphone. For an electric guitar, put it through an amp or use the reference tones to tune by ear.

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