Chord Progression Builder
Build a chord progression from a key and a popular pattern (I–V–vi–IV, ii–V–I, blues), hear it on guitar or piano, and transpose it.
Key + Pattern → Chords
Why it is safe to use
- Runs entirely in your browser; nothing you enter is sent to a server.
- Free, with no account and no sign-up.
- Installable as an app; a tool you have opened keeps working offline.
- Open source (MIT) on GitHub.