Select root...
C
D
E
F
G
A
B
Natural
# (sharp)
b (flat)
Choose a chord type...
••• Major chords •••
major
+5
add9
sus4
sus2
6
6/9
7
7 (alternate)
7sus4
7+5
7-5
7-9
7+9
maj7
maj7+11
maj9
9
11
11 (alternate)
13
13-9
••• Minor chords •••
m
m(add9)
m6
m7
m7+5
m7-5
m(maj7)
m9
m11
••• Other chords •••
dim
5 (powerchord)
History...