Free interactive Circle of Fifths

Explore key signatures, relative minor keys and diatonic chords. Hear scales and chords, free of credits.

Use arrow keys to choose a key. Tab moves between the major and minor rings. Selecting a key does not play sound.

C Major

Major: C · Relative minor: A

Key signature: No sharps or flats

Scale notes

CDEFGAB

Diatonic chords

Read the circle, then hear the key

Neighboring keys differ by one accidental. The inner ring shows relative minors, not parallel minors.

Piano practice in a bright room

See how keys connect

Move around the circle by fifths and compare neighboring key signatures. The minor ring shows relative minor keys, not parallel minor keys.

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Guitar practice in natural light

Listen beyond the diagram

Hear a scale or a chord. The chart describes major and natural minor harmony; it does not predict every chord a song may use.

Use

Turn a little theory into something you can hear

  1. Choose a key

    Select a major or minor key on the circle.

  2. Read the relationships

    Compare its notes, key signature and diatonic chords.

  3. Hear and keep exploring

    Play a scale or chord, or save the chart as a PDF reference.

Use

More free audio tools

Keep practicing tempo and pitch in the same session.

Explore Tools

Start from harmony and instruments

Hear a key, play a shape, or try a voicing in the browser before you take it back to your track.

Free interactive music tools

What creators say about Viralkey

See how creators use Viralkey for their music videos.

JM

Jason Mitchell

Indie Musician

One portrait plus my track — a performance-ready AI MV in 3 minutes.

Short-form for the next release finally keeps up.

GF

Grace Fox

Label Manager

Same face, different style — the team gets a new visual direction without reshooting or rebuilding the concept.

EW

Emma White

Electronic Musician

Upload a song and AI builds around rhythm and emotion — drops and energy shifts land in the picture.

MC

Mia Chen

Producer

No shoot crew.

Upload the track and get a release-ready AI music video in minutes.

DM

Diego Martins

Musician

Lip-sync and expression actually feel like singing — not a mismatched face track.

Viewers feel the emotion land.

HP

Hannah Parker

Label Manager

Same face across performance, story, and VFX, then 100+ styles on top — series posting finally scales.

RN

Ravi Nair

YouTuber

TikTok needs hooks and watch-through structure.

Viralkey clips can stop the scroll in the first seconds.

YL

Yuki Lin

Creator

Scenes and looks change, but the face stays the same — no face drift, consistent character at last.

LS

Leo Santos

Creator

Ship on release day: image to music video or song to music video — both modes cover what I need.

A few things worth knowing

Each neighboring major key is a perfect fifth higher in pitch class. Key signatures change one accidental at a time.

Give the idea a sound

Start small, listen closely and try one change at a time.

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