Chord Generator & Voicing Library

Construct and audition musical chords. Inspect guitar fretboard fingerings, piano chord shapes, and harmonic intervals.

Chord Synthesizer Ready

Select Root Note:

Select Chord Quality:

Selected Chord:

C Major

Chord Formula:

1 • 3 • 5

Component Pitches:

C • E • G

Guitar Fret Voicing:

Piano Keyboard Voicing:

How to Build Chords & Read Fretboard Voicings

Chords are the harmonic backbone of modern music. At their simplest, standard triads are constructed by stacking every other note in a scale — the root (1st), the third (3rd), and the fifth (5th). The spacing between these notes determines whether a chord sounds bright and joyful (major), melancholy and reflective (minor), or tense and ready to resolve (dominant 7th).

Chord Type	Formula	Interval Spacing	Sound & Character	Common Usage
Major (C)	`1 - 3 - 5`	Major 3rd + Minor 3rd	Bright, stable, grounded	Tonic home chord, pop & rock anthems
Minor (Cm)	`1 - b3 - 5`	Minor 3rd + Major 3rd	Mellow, reflective, sad	Emotional ballads, rock verses, indie grooves
Dominant 7 (C7)	`1 - 3 - 5 - b7`	Major triad + Flat 7th	Bluesy, gritty, strong tension	12-bar blues, funk riffs, lead-in to tonic
Major 7 (Cmaj7)	`1 - 3 - 5 - 7`	Major triad + Natural 7th	Lush, dreamy, open	Jazz standards, bossa nova, neo-soul
Minor 7 (Cm7)	`1 - b3 - 5 - b7`	Minor triad + Flat 7th	Warm, smooth, soulful	R&B progressions, jazz ii-V-I cadences
Suspended 4 (Csus4)	`1 - 4 - 5`	Root + 4th + 5th (no 3rd)	Airy, floating, unresolved	Acoustic guitar intros, tension before resolving to major

Why 7th Chords Create That Blues and Rock Pull

In a dominant seventh chord (like G7 in the key of C), the interval between the third (B) and the flat seventh (F) forms an unstable interval called a tritone. Your ear instinctively wants the B note to slide up one half-step into C, and the F note to slide down one half-step into E. That natural tension and release is what gives blues, rock, and jazz their signature forward momentum.

Movable Barre Chords on Guitar (E and A Shapes)

Once you learn how to play an open E chord and an open A chord, you can play virtually any chord on the entire neck. By placing your index finger as a movable clamp (barre) across all strings and sliding that shape up the fretboard, the E-shape gives you root-6 chords anywhere from F (fret 1) to A (fret 5), while the A-shape gives you root-5 chords like Bb (fret 1) or D (fret 5).

Using Inversions for Smoother Chord Transitions

Instead of jumping your hands up and down the piano or guitar neck to play chords in root position, try chord inversions. Placing the 3rd or 5th in the bass lets you connect adjacent chords with subtle finger movements, keeping the voice leading smooth and pleasing to the ear.

Frequently Asked Questions

How do I read these guitar chord boxes?

The six vertical lines are your guitar strings (thickest low E on the left, thinnest high E on the right). Horizontal lines represent frets. Dots show where to put your fingertips, 'O' means play the open string, and 'X' means do not strum or mute that string.

Can I hear how the chord is supposed to sound?

Yes! Click directly on any chord diagram or hit the Play Chord button to hear the full chord voicing played through the audio engine.

What should I do if my fingers cannot stretch across the frets?

Lower your thumb to the middle of the back of the neck instead of hooking it over the top; this gives your fingers more arch and reach. You can also explore open or alternate chord voicings that require fewer stretches.