Chord Progression Tool
Browse common progressions, or build your own in any key and play it back.
Key
Current key: C major
I – V – vi – IV
C – G – Am – F
No sound? Tap the page once first (browser autoplay policy).
How to use
- Pick a key and major / minor.
- Choose a preset, or set each slot's chord from the dropdown to build your own.
- "Add chord" extends the progression (up to 12). Set the tempo and loop, then press Play.
About roman-numeral (degree) notation
Chords are given as scale degrees. Upper-case (I, IV, V) are major-ish, lower-case (ii, vi) are minor-ish, ° is diminished, and 7 / M7 mark seventh chords. The same numerals give the same function in any key.
Preset examples
- Axis / pop (I–V–vi–IV): a four-chord loop used worldwide.
- Royal road (IV–V–iii–vi) and Komuro (vi–IV–V–I): staples of J-pop.
- ii–V–I: the fundamental jazz cadence.
- Canon and 12-bar blues: classical-to-blues standards.
Copyright
A chord progression on its own (e.g. I–V–vi–IV) is a common, functional element of music theory and is not protected by copyright. The preset names here are standard theory terms and do not refer to specific songs. What copyright protects in a real song is the melody, lyrics, arrangement and recording.
FAQ
- Can I try the same progression in a different key?
- Yes — change the key and every chord transposes while the degrees stay the same.
- What about richer extended chords?
- Each slot offers
IM7,ii7,V7and more. To see a single chord's notes, use the Chord Viewer.