What is a chord progression builder?

A tool that lets you build a chord sequence in a chosen key, hear it played back, and notate it in chord names or Roman numerals. The diatonic-chord helper limits the chord choices to those that naturally belong to the key, so even theory-light users can build progressions that 'work'. Switch out of diatonic mode and you can drop in any chord — borrowed chords, secondary dominants, the lot.

What does 'diatonic' mean for a chord progression?

Diatonic chords are the seven chords built from the notes of a single key. In C major: C (I), Dm (ii), Em (iii), F (IV), G (V), Am (vi), B° (vii°). Most pop, rock, folk and country songs sit almost entirely on the diatonic chords of one key, which is why diatonic progressions sound so 'right' to a Western-trained ear.

What's the difference between Roman numerals and chord names?

Chord names (C, F, G, Am) are absolute — they specify both the function and the key. Roman numerals (I, IV, V, vi) are relative — they specify only the function, so the same Roman numerals transpose to any key. A 'I-V-vi-IV' progression in C is C-G-Am-F; in G it's G-D-Em-C. Roman-numeral analysis is what unlocks transposing songs and seeing the structural patterns across thousands of pieces.

Can I hear the progression played back?

Yes — the builder uses Web Audio API synthesis to play back each chord in the progression. You can step through one chord at a time or loop the whole sequence. The synth voicing is a clean guitar-like tone, fine for sketch-listening (not concert quality, by design — the goal is to hear the harmonic motion, not to produce a backing track).

Can I save or share a progression I build?

Yes — the URL updates as you build, so you can copy the address and share it. The receiver opens the same progression. The current state is also saved to local storage, so closing the tab and reopening it later resumes where you left off.

Why would a guitar tutor use a progression builder?

Three teaching scenarios. First, theory teaching: walk the student through how I-V-vi-IV in C produces the same set of relationships as in G. Second, songwriting prompts: hand the student four diatonic chords and ask them to write a riff over the loop. Third, repertoire analysis: sketch out the chord progression of the song you're working on so you can study and transpose it. We unpack the lesson-block structure in How to plan a guitar lesson.

Is the chord progression builder free?

Yes — completely free, no signup, no ads, no usage limits. Use the output (chord names, Roman numerals, the audio sketches) in any commercial context — lesson handouts, songbooks, online courses, your own compositions.

Free Chord Progression Builder for Guitar — Diatonic, Roman Numerals, Audio Playback

TL;DR — The free chord progression builder at myguitartutor.com lets you sketch chord sequences in any key, hear them back, and switch between chord names, Roman numerals and Nashville notation. Built for guitar tutors teaching theory and for songwriters sketching the harmonic skeleton of a piece. No signup, no ads.

Teaching chord progressions is where music theory turns from abstract intervals into something a student can actually hear. The catch: most chord-progression tools online are either over-engineered (full DAWs with mixing controls) or under-engineered (static text lists of common progressions). What’s missing is the middle ground — a sketching tool that lets you build a four-chord loop in 20 seconds, hear it, and try variations.

That’s the gap our free chord progression builder fills.

What it is

A browser-based tool for sketching, hearing and notating chord progressions:

Pick a key — any of 24 keys (12 major, 12 minor). The diatonic chord helper changes to match.
Diatonic chord helper — the seven natural chords of the chosen key are one click away.
Build the progression — click chords to add them in sequence. Drag to reorder.
Hear it back — Web Audio synthesis plays the chords in time. Step through one at a time or loop the whole sequence.
Switch notation — chord names (C, F, G, Am), Roman numerals (I, IV, V, vi), or Nashville numbers (1, 4, 5, 6m).
Custom chords — switch off diatonic mode and drop in any chord (borrowed, secondary dominants, modal interchange).
Preset progressions — common patterns one click away: I-V-vi-IV, ii-V-I, 50s doo-wop, 12-bar blues.
Shareable URL — copy the link, send to your student.
Local storage — closing and reopening picks up where you left off.
No signup, no ads, no watermarks.

How to use it

Four steps to a working progression:

Open the progression builder.
Pick the key — say, C major.
Click chords from the diatonic helper to build the sequence. For example: I, V, vi, IV → C, G, Am, F (the most-used progression in Western pop music).
Press play to hear it loop. Switch notation to Roman numerals to see the relative pattern.

To experiment with substitutions, switch off diatonic mode and drop in a borrowed chord (e.g. iv from the parallel minor) to hear what happens.

Pro tips for tutors

Teach the I-V-vi-IV pattern across multiple keys

Build I-V-vi-IV in C (C-G-Am-F), then change the key to G and watch the chord names update (G-D-Em-C). The Roman numerals don’t change — that’s the lesson. Most pop songs sit on this exact progression; recognising it in any key is one of the highest-value theory skills you can teach.

Use the audio playback for ear training

Build a four-chord progression but don’t show the student the chord names. Play it. Ask them: which chord is the I? Which feels like the “home” chord? This builds tonic identification — the foundation of all functional ear training.

Sketch the song’s progression before learning the riff

When a student brings a song they want to learn, build the chord progression first, listen to it loop, then tackle the riff. Knowing the harmonic skeleton makes the melody and rhythm parts intelligible — without it, the student is memorising sequences of finger movements with no underlying structure.

Use Nashville notation for transposing on the fly

Nashville notation (1, 4, 5, 6m) is what session musicians use because it transposes instantly. Once a student can read a chord sheet in Nashville, they can play the same song in any key — which is what they’ll need when a singer asks them to “drop it down a tone.”

Where it fits in the teaching workflow

The progression builder lives in the theory/listening block of a structured lesson:

Plan the lesson with a lesson planner — allocate 10 minutes to theory/listening.
Sketch the progression of the current repertoire piece during the theory block. Play it, transpose it, discuss what makes it tick.
Set the analysis as homework — “next week, bring me the Roman-numeral analysis of the chorus.” Log it on the practice log.
Track progression-analysis skill on the student progress tracker.

The pillar pieces on lesson structure, retention and motivation: How to plan a guitar lesson, How to track guitar student progress, How to get guitar students to actually practice.

Tools that pair with the progression builder

The progression builder is one of seven free browser tools for guitar tutors:

Chord chart generator — print clean diagrams for any chord in your progression for student handouts.
Chord encyclopedia — 228 pre-built voicings if you want to give the student multiple options for a chord.
Reverse chord & scale lookup — the opposite tool: drop in notes and identify the chord.
Scale generator — visualise the scale that fits the progression (use the I chord’s major or relative minor pentatonic).
Metronome — set a tempo, loop the progression, improvise over it.
Tuner — tune before any harmonic work.

Try it now

The free chord progression builder is one click away. Bookmark it, share progression URLs with students, and turn theory blocks from abstract whiteboard chat into something the student can hear.

If you’re running a tutoring practice that’s outgrown a folder of free tools, our bespoke teaching platform gives you a built-in progression engine that students can practise along with — saved progressions per student, sharable to phones, loopable, transposable, all on your branded domain.