Generator (free)
Unlock Pro (USD 9)
Pro adds 7th, 9th and sus chords, dorian, mixolydian and phrygian modes, inversions and spread voicings, a random generator that follows functional harmony (tonic, subdominant, dominant), and 60 extra progression presets.
Pro is a one-time licence key (USD 9) sold by us on Gumroad. Buy the Pro licence key on Gumroad. If you already have a key, enter it below.
About this tool
- It is a browser tool: your choices and the MIDI file stay on your device.
- The preset lists were written with AI help. They are common patterns, not recordings of any song.
- Only anonymous event counts are recorded (a preview was started, a file was downloaded), with no cookies and no personal data. See the privacy notice.
- Refunds follow Gumroad terms: see the refund policy.
- The MIDI files are Standard MIDI Format 0 files generated by a script and checked by automated tests of the file structure. We make no claim about how any particular DAW imports them.
Background reading: Chord progression and Roman numeral analysis on Wikipedia.