THUNDERFRET
Free tools / Guitar chord finder

Guitar chord finder

Tap the fret you're holding on each string and it names the chord — the reverse of a chord diagram. Slash chords included. Free.

Name your chord

Holding a shape and not sure what it is? Tap it out on the neck below — tap any fret to place a note, or tap the O / at the nut to set a string open or muted — and the name appears as you build it, right up to the 15th fret.

E
E · B · G#
35791215EADGBeOOOBEG#
Tap any fret to build the chord · tap the O/ at the nut to set a string open or muted.

How it works

A chord is just a set of notes. The finder reads the pitches you're fretting, works out which chord they spell, and picks the most likely name — checking the bass note so it can tell a plain C from a C/E. It covers majors, minors, 7ths, sus, add9, 6ths, diminished and augmented shapes.

Want the other direction — see a named chord's shape? Browse the chord library, or use a capo chart to transpose it.

// There's more

The full tool shows any chord across the whole neck, in every voicing, plus scales and ear training. Free.

Open the full chord tool

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