Chord transposer: move a progression to a new key
Arrange your own chords, then transpose the sequence without changing its chord qualities.
Choose and arrange your own chords. Transposition keeps their interval relationships.
Original progression
Transposed progression
| Original progression | Transposed progression |
|---|---|
| CC4 · E4 · G4 | DD4 · F♯4 · A4 |
| FF4 · A4 · C5 | GG4 · B4 · D5 |
| GG4 · B4 · D5 | AA4 · C♯5 · E5 |
Ready to play. Sound starts when you press Play.
Make your sequence
Add chords in the order you want to hear them. Reorder or remove an entry as you refine the phrase. A progression here is your own sequence, not an AI suggestion or a song identification result.
Check the before and after
Moving C–F–G–Am up two semitones gives D–G–A–Bm. Every root moves by the same amount; the final chord remains minor. Changing the key and changing a chord’s quality are separate operations.
| Before | Up two semitones |
|---|---|
| C | D |
| F | G |
| G | A |
| Am | Bm |
Listen, compare and save
Choose a spelling that makes sense in the destination key, then play the complete sequence. Keep a JSON copy if you want to reopen and edit it later. A PDF records the reference notes and symbols but does not retain an editable project or audio.
Sources and methods
- Diatonic chords in major
- Enharmonic notes
- ChordLilt product contract