Online Chord Progression Library — Genre Filter | LazyTools

Music Theory

Online Chord Progression Library — Genre Filter & Instant Playback

Browse 20 essential chord progressions across eight genres — Pop, Rock, Jazz, Blues, R&B, Folk, Electronic and Classical. Filter by genre or search by chord name, Roman numeral or description. Furthermore, click Play on any progression to hear it arpeggiated immediately in your browser. The LazyTools library is the only free tool combining genre filtering and instant playback without ads or sign-up.

20 progressions across 8 genresGenre filterSearch by chord or numeralOne-click playbackRoman numeral & chord names

How to use the Online Chord Progression Library

Filter by genre

Select a genre from the dropdown — Pop, Rock, Jazz, Blues, R&B, Folk, Electronic or Classical. Furthermore, the list filters instantly to show only progressions in that genre. Leave it set to "All genres" to browse the full collection.

Search by chord, numeral or keyword

Type in the search box to filter by any part of the progression. Furthermore, searching "II-V" finds all progressions containing that jazz turnaround. Searching "Am" finds progressions containing A minor. Search is case-insensitive and works on Roman numerals, chord names and descriptions.

Read the progression details

Each result shows the genre badge, Roman numeral analysis, chord names with the key, and a short description. Furthermore, Roman numeral analysis (I, II, III, IV, V, VI, VII) shows the harmonic function of each chord regardless of key — making progressions transposable to any key.

Click Play to hear the progression

Click the green Play button on any progression to hear it played immediately. Furthermore, each chord arpegiates slightly (notes played in quick succession rather than simultaneously) for clarity. The playback runs once through the full progression.

Transpose to your key

The library shows progressions in their example keys. Furthermore, Roman numeral analysis lets you transpose to any key — if the example is in C major and you want G major, replace each chord with the corresponding chord in G major using the Circle of Fifths tool.

Roman numeral analysis across genres

Roman numerals describe chord function regardless of key. Furthermore, the same Roman numeral pattern sounds identical in any key — only the actual pitch changes. This makes Roman numeral analysis the universal language for chord progressions.

Roman numeral	Chord quality	Function	Example in C
I	Major	Tonic — home, resolution	C major
II or IIm	Minor	Supertonic — pre-dominant	D minor
IV	Major	Sub-dominant — movement away from home	F major
V	Major	Dominant — tension, wants to resolve to I	G major
VIm	Minor	Relative minor — emotional depth	A minor
bVII	Major (borrowed)	Borrowed from parallel minor — rock flavour	Bb major

How to transpose a progression to any key

Transposing moves a progression from one key to another. Furthermore, the Roman numeral analysis stays the same — only the chord names change. Use the Circle of Fifths or the diatonic chord table for the target key to map each Roman numeral to the correct chord.

I–V–VI–IV in C = C–G–Am–F | same in G = G–D–Em–C

I = tonic chord of the target key (e.g. G major in G)
V = fifth chord of target key (e.g. D major in G)
VI (minor) = sixth chord of target key (e.g. E minor in G)
IV = fourth chord of target key (e.g. C major in G)

Worked example: transposing I–V–VI–IV from C to G

The I–V–VI–IV progression sounds the same in any key. Here is the same progression in four keys:

Degree	Key of C	Key of G	Key of D	Key of Bb
I	C major	G major	D major	Bb major
V	G major	D major	A major	F major
VI	A minor	E minor	B minor	G minor
IV	F major	C major	G major	Eb major

The I–V–VI–IV progression is the most recorded chord progression in popular music. Furthermore, songs in every key use the same harmonic structure — only the pitch differs. Playing it in G major (G–D–Em–C) on a capo-2 guitar produces the same open-chord feel as C major (C–G–Am–F) without a capo.

What are chord progressions?

A chord progression is a sequence of chords played in order. Furthermore, it forms the harmonic foundation of a song — defining the key, mood and direction of the music. Most popular songs use between three and eight chords in a repeating pattern. The specific pattern determines much of the emotional character of the music.

Chord progressions have been the primary structural element of Western music for centuries. Furthermore, composers in the Baroque period used standardised progressions like I–IV–V–I as cadences. Jazz musicians codified the II–V–I turnaround as the universal movement from tension to resolution. Moreover, pop songwriters have used the I–V–VI–IV pattern so prolifically that music theorists call it the "axis progression."

Why certain progressions work in certain genres

Genre-specific progressions reflect the harmonic vocabulary and emotional expectations of their listeners. Furthermore, blues progressions use dominant seventh chords because the minor third and flat seven create tension that reflects the blues emotional language. Jazz progressions use extended chords and complex substitutions because jazz listeners expect harmonic sophistication. Moreover, pop progressions prioritise resolution and accessibility — the I chord appears frequently, giving listeners a clear tonal home.

Why chord progressions matter for songwriters

Understanding chord progressions transforms a guitarist or pianist from a player into a composer. Furthermore, knowing which chords belong together in a key — and which movements create specific emotional effects — removes guesswork from composition. Moreover, the library here provides a starting inventory of proven progressions that can be used as-is or adapted.

Progressions are not copyrightable. Furthermore, the I–V–VI–IV progression belongs to no single artist — thousands of songs use it. Songwriters are free to use any progression as a structural starting point and make the song unique through melody, rhythm, lyrics and production. Moreover, learning classic progressions builds harmonic intuition that eventually enables original composition without reference to examples.

The II–V–I in jazz

The II–V–I turnaround is the foundational harmonic movement in jazz. Furthermore, it appears in virtually every jazz standard — standards are collections of these turnarounds in various keys and sequences. Jazz improvisation education begins by learning to navigate II–V–I in all 12 keys. Moreover, understanding this progression unlocks the ability to play over the vast majority of jazz repertoire.

Frequently asked questions

What is the most popular chord progression?+

The I–V–VI–IV progression is the most widely recorded chord progression in popular music. Furthermore, it appears in thousands of songs across pop, rock and country. In C major: C–G–Am–F. In G major: G–D–Em–C. The progression works because it cycles through the tonic (I), dominant (V), relative minor (VI) and sub-dominant (IV) — covering all the primary harmonic functions. Moreover, its familiarity creates an instant sense of recognition and comfort in listeners.

What does II–V–I mean in jazz?+

II–V–I refers to three chords built on the second, fifth and first degrees of a major key. Furthermore, in C major: Dm7 (II), G7 (V), Cmaj7 (I). The movement from II to V to I creates a smooth harmonic pull — II is a pre-dominant chord, V is dominant (creates tension), and I is the tonic (resolves the tension). Moreover, this three-chord pattern appears in some form in nearly every jazz standard ever written.

Can I use any of these progressions in my songs?+

Yes — chord progressions are not copyrightable. Furthermore, the harmonic patterns in this library are shared musical vocabulary used by thousands of composers and songwriters. Using a common progression as a starting point and adding your own melody, rhythm and arrangement creates an original song. Moreover, the same progression can sound completely different depending on tempo, key, voicing, rhythm and instrumentation.

What is the difference between major and minor progressions?+

Major progressions use chords built on major scale degrees and generally sound bright and positive. Furthermore, minor progressions use chords built on natural minor scale degrees and sound darker and more emotional. However, most real songs mix major and minor chords — the I chord might be major while the VI chord is minor (as in I–V–VI–IV). Moreover, borrowed chords from the parallel minor key add tension and colour to otherwise major progressions.

How do I transpose a progression to a different key?+

Identify the Roman numeral of each chord in the progression. Furthermore, apply those same Roman numerals to the diatonic chords of your target key. For example, I–V–VI–IV in C (C–G–Am–F) becomes I–V–VI–IV in D (D–A–Bm–G). The Circle of Fifths tool shows all diatonic chords for any key instantly. Moreover, if you use a capo on guitar, you can play familiar chord shapes in one key and the capo raises them to match any target key.

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