Chord Progression Builder
Pick a key, a mode and a style, then build a progression one chord at a time. Each suggestion shows how often that move happens in the style, and why it works.
Your progression in C major
Choose a first chord below, or start from a well-known progression.
Start with
Or start from a well-known progression
How the suggestions work
Every key has a family of chords built from its scale, and each chord has a job: home (the tonic), moving away (the subdominant, like IV and ii) or tension (the dominant, like V). Most progressions travel home, away, tension and back home again.
The percentages come from how often each move happens in that mode, nudged by the style you pick: rock leans on the flat VII, jazz on chains of falling fifths, blues on dominant seventh chords. When your last few chords match a well-known progression, the chord that usually follows moves up the list. Chords marked Outside the key are borrowed from a related key or point at another chord; they're common in that style and add colour.