Chord Tools
Free browser-based Chord Tools tools.
Chord Builder
Construct chords from intervals
Chord Finder
Identify chords from notes
Chord Inversion Explorer
View all inversions
Chord Substitution Finder
Find tasteful substitutions
Secondary Dominant Finder
V/x dominant lookup
Circle of Fifths Tool
Interactive circle of fifths
Chord Chart Builder
Guitar and piano chord charts
Nashville Number System Tool
Number charts for any key
Chord Progression Generator
Generate fresh progressions
Modulation Pathway Tool
Pivot chord modulation paths
Borrowed Chord Explorer
Modal interchange chords
Extended Chord Reference
9ths, 11ths, 13ths and beyond