Guitar Chord Progression Generator
Choose a key, generate four chords, and hear how they fit together before trying the shapes on your guitar.
I · bar 1
V · bar 2
vi · bar 3
IV · bar 4
One chord per bar in 4/4. Minor mode uses natural minor harmony, including a minor v chord.
Turn a progression into something playable
The generator selects from four harmonic patterns for each mode and transposes them into your chosen key. Every result includes a guitar voicing and its scale degree. Use the diagram to find a starting position, then change the rhythm or inversion to suit your part.
Playback gives each chord one bar in 4/4. At 90 BPM the four-bar example lasts about 10.7 seconds. The reference sound illustrates pitches and timing, rather than a recorded guitar performance.
What the Roman numerals tell you
In C major, I–V–vi–IV becomes C–G–Am–F. Moving to G major preserves those relationships and gives G–D–Em–C. Uppercase numerals denote major chords; lowercase ones identify minor chords. A small degree sign marks a diminished triad.
Minor mode follows the natural minor scale. Its fifth chord is minor. Many songs replace that chord with a major or dominant seventh chord, but that alteration is not inserted automatically here.
Use the result as a starting point
Hold a chord for an extra bar, leave a beat of silence, or try a different strumming pattern. Those choices often change the character more than generating another sequence.
A progression does not identify a song or guarantee an original composition. Common harmonic patterns appear in many unrelated recordings.