Question 1

How do I use the online guitar tuner?

Accepted Answer

Click 'Start Tuning', allow microphone access, then pluck a string. The needle shows how far off you are in cents — turn the tuning peg until the needle centers and turns green.

Question 2

Is this guitar tuner accurate?

Accepted Answer

Yes. It uses the McLeod Pitch Method (MPM) algorithm, which provides professional-grade accuracy within ±1 cent. For best results, tune in a quiet environment and pluck one string at a time.

Question 3

Does this tuner work on mobile?

Accepted Answer

Yes. It works on iPhone, Android, and all modern mobile browsers. Make sure to allow microphone permission when prompted.

Question 4

What is a cent in guitar tuning?

Accepted Answer

A cent is 1/100th of a semitone. A difference of ±5 cents is barely noticeable to the ear. A good target is ±3 cents or less — shown as green on this tuner.

Question 5

What guitar tunings are supported?

Accepted Answer

Standard (E A D G B E), Drop D, Double Drop D, Half Step Down (Eb), Full Step Down (D), Drop C, Open G, Open D, Open E, and DADGAD. Bass guitar and ukulele modes are also available.

Question 6

What does Drop D tuning mean?

Accepted Answer

Drop D tuning lowers the lowest string (6th string) from E to D. It enables power chords with one finger and is popular in rock, metal, and folk music.

Question 7

Can I tune bass guitar or ukulele with this?

Accepted Answer

Yes — click the Bass or Ukulele tab at the top to switch modes, each optimized for that instrument's frequency range and common tunings.

Online Guitar Tuner — Free, Accurate, No Download