Reharmonizator

Harmonizator is a professional chord chart editor and reharmonization engine for musicians, composers, and jazz students.

BUILD YOUR CHART
Enter any chord progression using the intuitive chord builder or tap notes on the piano keyboard — the app detects the chord automatically. Supports all chord types: triads, seventh chords, extended harmonies, slash chords, and more.

ANALYZE YOUR HARMONY
Get instant harmonic analysis of your progression: key detection, Roman numeral notation, chord function (tonic, dominant, subdominant), and II-V-I pair highlighting.

REHARMONIZE WITH PROFESSIONAL TECHNIQUES
Apply jazz reharmonization tools used by professional arrangers:

Secondary dominants
Tritone substitution
Related II (ii-V)
Modal interchange
Bass change & inversions
Hybrid / polychords
Chromatic approach
Parallel voicing
Cadential 6/4 & Sus
Backdoor dominant
HEAR IT IN REAL TIME
Play back your progression with Rhodes, Synth, Guitar, or Choir sounds. Adjust tempo, time signature, chords per bar, and individual volumes for chords, bass, and drums.

ADD A MELODY
Write, record, or generate a melody over your chord chart. Edit notes in a piano roll or view them on a staff. Export your work as a MIDI file.