Best Free Online Guitar Tuner for Acoustic and Electric Guitar

Welcome to Acoustic World’s free, ultimate guitar tuning database.

Is Learning Guitar Even Worth It? (... x
Is Learning Guitar Even Worth It? (The TRUTH)

With the guitar tuners below, you can tune your acoustic or electric guitar online for free.

Below you’ll find free online guitar tuners for tuning your guitar to standard tuning and all the most common alternative and alternate tunings, including:

  • Drop D Guitar Tuning
  • DADGAD Guitar Tuning
  • Open C Guitar Tuning
  • Open G Guitar Tuning
  • Open E Guitar Tuning
  • Standard Tuning Half Step Down
  • Standard Tuning Whole Step Down

Standard Tuning Guitar Tuner:

E
A
D
G
B
E
Guitar Tuner from GTDB gtdb.org
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Notes on Standard Tuning:

Standard tuning on guitar is the most popular tuning used by the vast majority of guitarists in the vast majority of songs. The string pitches for standard tuning on guitar are E, A, D, G, B, and E, from the lowest pitch (low E2) to the highest pitch (high E4).

To aid in memorizing the notes in standard tuning, some guitarists use helpful mnemonics like Eddy Ate Dynamite, Good Bye Eddy.


Alternate Tuning Guitar Tuners:

Drop D Guitar Tuner

D
A
D
G
B
E
Guitar Tuner from GTDB gtdb.org
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DADGAD Guitar Tuner

D
A
D
G
A
D
Guitar Tuner from GTDB gtdb.org
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Open C Guitar Tuner

C
G
C
G
C
E
Guitar Tuner from GTDB gtdb.org
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Open G Guitar Tuner

D
G
D
G
B
D
Guitar Tuner from GTDB gtdb.org
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Open E Guitar Tuner

E
B
E
G#
B
E
Guitar Tuner from GTDB gtdb.org
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Tune Your Guitar Down a Half Step (Standard Tuning Half Step Down)

D#
G#
C#
F#
A#
D#
Guitar Tuner from GTDB gtdb.org
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Tune Your Guitar Down a Whole Step (Standard Tuning Whole Step Down)

D
G
C
F
A
D
Guitar Tuner from GTDB gtdb.org
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Notes on Alternate Tunings:

On guitar, anything other than standard tuning is typically considered an alternate tuning. However, some guitarists also chose to use standard tuning, but tune their strings a half step or whole step down.

This is common on acoustic guitar, as it can make the strings feel a bit lighter and more flexible. This is helpful when trying to do string bends, for example.

Some guitarists wonder if changing tunings constantly or using alternate tunings, in general, is bad for your guitar. To learn the answer, read my guide to changing guitar tunings here.


Need More Help Learning How to Tune a Guitar?

If you need more detailed help on how to tune your guitar, I recommend watching this guitar tuning tutorial:

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