Free Online Guitar Tuner

How to Tune Your Guitar with Our Free Online Tuner

Achieve perfect tuning every time with our easy-to-use, free guitar tuner.

Step 1) Activating the guitar tuner: Begin by clicking the red microphone icon. Your device will prompt you to grant permission to access your microphone – click "allow." This will allow the online guitar tuner to detect your guitar's sound.

Step 2) Checking if your guitar strings are in tune:

  • To ensure accurate tuning, minimize background noise while using the tuner.
  • Start by playing any string on your guitar (we suggest starting with the lowest string).
  • The tuner will recognize the note being played and show how close it is to the correct pitch.
  • After playing a note, a slider will appear on the screen, representing the pitch of your string.
  • If the slider is green, your string is in tune. If the slider is red, your string is out of tune.

Step 3) Reading the guitar tuner: If the slider on the guitar tuner is red, indicating that you're out of tune, your pitch is either flat or sharp.

If the slider is to the LEFT of center, your string is FLAT. In this case, turn the tuning peg for your string counterclockwise until the slider turns green.

If the slider is to the RIGHT of center, your string is SHARP. In this case, turn the tuning peg for your string clockwise until the slider turns green. Once in-tune, repeat this process for the remaining strings on your guitar.

Tuning Tips:

The tuner defaults to standard tuning (EADGBe), but you can access alternative tunings by clicking on "standard" and selecting your preferred tuning. Turn the tuning pegs gently to avoid over correcting or breaking a string.

How often should you tune your guitar?

Guitar tuning frequency depends on various factors:

  • Playing frequency
  • Stringing technique – Poor stringing can cause more frequent tuning issues
  • Guitar type – Some guitars, like Gibsons, are known for their G strings going out of tune
  • Room temperature – Ideally, 66-77 °F or 19-25 °C
  • Humidity – Optimal humidity is 40-50%
  • Storage – Storing your guitar in a case vs. exposed to the environment


A tuner can be used on any musical instrument. A list of common instruments and their tuning is shown below. Except for the ukulele and banjo, which do not have strings organized by pitch, the notes are written from lowest to highest.


Guitar: E A D G B E
Bass guitar: E A D G
Ukulele: G C E A
Banjo: G D G B D
Mandolin: G G D D A A E E
Violin: G D A E
Viola: C G D A
Cello: C G D A
Double bass: E A D G


As a general guideline, if you play the guitar for 30 minutes to an hour continuously, check your tuning at least once during that session. We recommend tuning your guitar every time you sit down to play.

When performing live, tune your guitar every two to three songs. Adding a reminder to your setlist can help you remember.

Bookmark this site to have a free guitar tuner available whenever you need it!