Chord Progression Generator
Choose Key, Mood & Length – get chords, Roman Numerals, alternatives, and a brief theory breakdown.
1) Settings
2) Result
FAQ
Why do Roman Numerals work so well?
Because they describe the function instead of just the name: I is home (tonic), V builds tension (dominant), IV and vi are neighbors. This allows you to transpose the same progression into any key.
What is the difference between "Sad" and "Dark"?
"Sad" usually stays within the standard minor scale (emotional, clear). "Dark" frequently uses borrowed chords like ♭VII or ♭VI and sus-chords to create more shadows and drama – typical in Rock, Trap, and film scores.
How do I make a progression "more epic"?
Focus on longer tension arcs: build towards V (or V/V), use 6–8 chords, and try using a pedal tone (one note stays the same) or a "lift" in the final chord (e.g., IV → V → i).
I don't like the result – what now?
First, try changing the Length (4 → 6) or the Mood. Alternatively, swap just one chord for a suggested alternative. Often, a single change (e.g., IV → ii) is enough to shift the entire vibe.
Chord Progression Generator: Progressions by Key, Mood & Genre — With Music Theory Explanation
The Chord Progression Generator creates ready-to-use chord progressions for any key, mood (happy, sad, tense, mysterious, uplifting), and genre (pop, jazz, blues, classical, film, metal). Each progression is displayed with chord names, Roman numerals, and a plain-English music theory explanation of why it sounds the way it does — making it educational as well as instantly practical for songwriters and producers.
Mood-Based Generation
Select a mood and the generator picks progressions whose harmonic movement matches: happy (I–V–vi–IV type), sad (vi–IV–I–V, minor keys), tense (diminished chords, tritone substitutions), mysterious (modal, unresolved), uplifting (IV–I, bright modulations).
Genre Presets
Genre presets load typical harmonic patterns: jazz (ii–V–I, turnarounds), blues (I–IV–V with dominant 7ths), film (Lydian borrowings, parallel major/minor), pop (I–V–vi–IV, I–IV–V), metal (power chords, Phrygian patterns), folk (I–IV–I–V).
Theory Explanation
Every generated progression comes with an explanation: which chords create tension, which provide resolution, why the progression sounds the way it does, and what makes it work harmonically — turning the tool into a music theory lesson as well as a practical generator.
Variations
For each progression, generates 3 variations: a simplified version (fewer chords), an enriched version (substitutions and extended chords), and a reharmonised version using borrowed chords or secondary dominants for a more sophisticated sound.
The Most Used Chord Progressions in Popular Music
| Progression | Roman numerals | In C major | Mood / genre | Famous examples |
|---|---|---|---|---|
| The "Axis" / "Pop" progression | I–V–vi–IV | C–G–Am–F | Happy, anthemic, universally pleasing | "Let It Be", "No Woman No Cry", "With or Without You", "Don't Stop Believin'" |
| 50s / "doo-wop" progression | I–vi–IV–V | C–Am–F–G | Nostalgic, romantic, classic pop | "Stand By Me", "Blue Moon", "Earth Angel", "Every Breath You Take" |
| ii–V–I (jazz turnaround) | ii–V–I | Dm7–G7–Cmaj7 | Jazz resolution, sophisticated, smooth | Virtually every jazz standard; "Autumn Leaves", "All The Things You Are" |
| 12-bar blues | I–I–I–I / IV–IV–I–I / V–IV–I–V | C7–C7–C7–C7 / F7–F7–C7–C7 / G7–F7–C7–G7 | Blues, soul, rock, R&B | "Johnny B. Goode", "Pride and Joy", "The Thrill Is Gone" |
| Andalusian cadence | i–bVII–bVI–V | Am–G–F–E | Spanish, dramatic, descending minor | "Stairway to Heaven" (intro), "Sultans of Swing", flamenco music |
| vi–IV–I–V (minor feel in major) | vi–IV–I–V | Am–F–C–G | Emotional, melancholic, cinematic | "Someone Like You", "Wherever You Will Go", countless ballads |
| I–IV–V (basic blues/rock) | I–IV–V | C–F–G | Energetic, simple, driving | "La Bamba", "Twist and Shout", "Wild Thing" |
Understanding Tonic, Subdominant & Dominant Function
- Tonic function (I, iii, vi) — "home"The tonic chord is the point of rest and resolution — it sounds stable and complete. In C major, C major (I) is the primary tonic; Am (vi) and Em (iii) have tonic-like stability because they share two of the three tonic chord tones. Progressions that end on I feel resolved and finished. Starting a progression on I establishes the key immediately.
- Subdominant function (IV, ii) — "departure"Subdominant chords create a sense of movement away from home — they provide lift and motion, but without the strong pull back to tonic that dominant chords create. The IV chord (F in C major) is the "brightening" departure; ii (Dm) is the jazzier departure. The most common use: I→IV begins the journey outward. The famous "plagal cadence" (IV→I, the "Amen" ending) moves directly from subdominant back to tonic — softer and more settled than a dominant→tonic resolution.
- Dominant function (V, vii°) — "tension and pull"The dominant chord (V7 especially) creates strong harmonic tension that pulls powerfully back to the tonic. The V7 chord (G7 in C major) contains a tritone interval (the most dissonant interval in Western music) between its third and seventh — this tension resolves when the chord moves to I. This V→I resolution ("authentic cadence") is the single most powerful harmonic movement in Western music, driving the sense of closure, climax, and arrival. Secondary dominants (V7 of ii, V7 of IV etc.) temporarily apply this tension to other scale degrees, creating temporary "tonicisations" that add harmonic richness.
- Combining functions: the typical "story arc" of a progressionMost satisfying chord progressions follow a functional arc: Tonic → Subdominant → Dominant → Tonic (home → departure → tension → resolution). I–IV–V–I is the simplest version. I–ii–V–I is the jazz version. I–IV–ii–V–I is expanded. The "Axis" progression I–V–vi–IV actually reverses this (starts with tonic, goes to dominant, then tonic-substitute, then subdominant) — its unusual order is part of why it feels fresh and keeps cycling without a strong cadence.
Frequently Asked Questions
Why do I–V–vi–IV and vi–IV–I–V sound so similar?
They use exactly the same four chords — just starting at a different point in the cycle. I–V–vi–IV starts on the tonic (major, bright); vi–IV–I–V starts on the relative minor (Am in C major, slightly darker). Because both progressions loop infinitely, they are literally the same sequence of chords with a different starting emphasis. This is why hundreds of songs use what appears to be the same "four chords" — the emotional difference comes from which chord you start and end on (establishing it as the tonal home), the melody, the rhythm, the tempo, and the production. Starting and ending on vi makes the progression feel minor-ish; starting on I makes it feel major/bright. The generator shows both framings and explains the difference.
What makes the ii–V–I progression so central to jazz?
The ii–V–I progression (e.g., Dm7–G7–Cmaj7 in C major) is the fundamental harmonic unit of jazz because it combines all three harmonic functions in two steps: ii (subdominant, departure) → V7 (dominant, maximum tension) → I (tonic, resolution). The V7 chord's tritone resolves by half-step into the I chord — the strongest possible harmonic gravity in Western music. Jazz musicians extend this by: adding extensions (9, 11, 13) to each chord, substituting the V7 with a tritone substitution (bII7), altering the V chord (V7b9, V7#11), or preceding the ii with its own secondary dominant (V7/ii = A7 in C major). An entire jazz education is essentially learning to play over, through, and around ii–V–I progressions in all 12 keys and in all their altered forms — it is the harmonic DNA of the genre.
Can I use the generated progressions without knowing music theory?
Yes — the generator outputs chord names in letter notation (C, Am, G7, Fmaj7 etc.) that you can directly use with a chord chart, piano, guitar, or any chord-based instrument without any theory knowledge. Look up each chord shape, play them in the given order, and you have a working progression. The theory explanations are optional context for those who want to understand why it sounds good — not a prerequisite for using it. Many successful songwriters work entirely by ear, feeling which chords sound right rather than analysing them theoretically. The generator is designed to bridge both approaches: practical chord names for immediate use, plus theory for those curious about the underlying logic.
What is a turnaround and how do I use it?
A turnaround is a short chord progression (usually 2–4 chords) placed at the end of a section to create harmonic momentum that leads back to the beginning — "turning around" to restart the progression. The most common jazz turnaround: I–VI–II–V (in C major: Cmaj7–A7–Dm7–G7). The VI chord (A7 here, functioning as a secondary dominant V7/ii) creates an unexpected chromatic pull that makes the final V–I resolution feel even stronger. In blues, a common turnaround in bars 11–12: V7–IV7–I–V7. In pop, a simple I–V serves as a turnaround. Turnarounds are most audible at the end of a verse or chorus, in jazz solos between choruses, and at the repeat point of a looped progression — they add motion and prevent the progression from feeling static.
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