Chord Theory
Progression Generator
Pick a key and a mood, then generate a musically coherent chord progression instantly. Free browser tool — play it back right away.
What is this tool?
A one-click chord progression generator. Pick a key, length, and mood, and the tool generates a musically valid progression that resolves naturally to the tonic — all based on standard music theory transitions.
When it helps
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Spark songwriting ideas
Discover progressions you wouldn't write on your own. Open a favorite in the Builder to tweak and make it yours.
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Endless practice backings
Generate fresh backing progressions for ear training or improvisation — no two sessions have to feel the same.
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Hear mood-based conventions
Switching the mood filter (Bright, Melancholic, etc.) quickly teaches you which chord moves define each feel.
How to use
- 1 Set the key, major/minor, and length (4/8/12 chords) in the top bar.
- 2 Tap the mood button and pick a feel (or leave it on "Auto").
- 3 Press "🎲 Generate" in the dock to produce a random progression.
- 4 Use "▶ Play" to hear it, or "🏗️ Edit in Builder" to carry it over for customization.
- 5 Not vibing? Hit "Generate Another" as many times as you like.