Online guitar tuner

Free guitar tuner using your phone or computer microphone: standard tuning (E A D G B E), drop D, DADGAD, open G and about twenty more.

Turn on the microphone and play an open string: the needle should sit in the centre. Click a string to hear the reference note.

▶ Open the app

Tuning

Standard	E A D G B E
Half step down	E♭ A♭ D♭ G♭ B♭ E♭
Whole step down (D standard)	D G C F A D
Drop D	D A D G B E
Double drop D	D A D G B D
Drop C♯	C♯ G♯ C♯ F♯ A♯ D♯
Drop C	C G C F A D
Drop B	B F♯ B E G♯ C♯
Drop A	A E A D F♯ B
DADGAD	D A D G A D
Open D	D A D F♯ A D
Open D minor	D A D F A D
Open D6	D A D F♯ B D
Open G	D G D G B D
Open E	E B E G♯ B E
Open A	E A E A C♯ E
Open C	C G C G C E
C6	C A C G C E
New Standard (Fripp)	C G D A E G
Nashville (high strung)	E A D G B E