About us

About ChordFlow

ChordFlow is a free library of guitar, piano, ukulele, bass and mandolin chords — chord diagrams with fingerings, piano voicings, scales, keys, chord progressions and practice tools. Every chord shows its notes, intervals and fingerings, and every tool runs in your browser. No sign-up, no cost.

What we do

Every tool on this site answers one practical question with the notes you already have: what is in this chord, where do my fingers go, what key is this song in, what happens if I put a capo on the third fret. There are 32 tools, and every one of them runs entirely in your browser — nothing you type is sent to a server, and nothing costs anything. No sign-up, no account, no paywall.

The guides go deeper than the tools. Each one is 1,200+ words and works the theory out in full: why a major chord sounds bright and a minor chord sounds sad, how a scale becomes a key, why the same four chords show up in thousands of songs, and how to move a progression to a key that suits your voice. Chord diagrams, scales and intervals follow standard equal-temperament music theory (A4 = 440 Hz), and where a fingering is a standard shape rather than the only shape, we say so.

What we are not

ChordFlow is not a music teacher, a publisher or a record label, and nothing on this site is a substitute for lessons with a good teacher. We cover chords, scales, keys and theory only — never song chord charts or lyrics, which belong to their writers and publishers. A diagram shows you where to put your fingers; it cannot hear your timing, your tone or your technique. Read the full Disclaimer.

How the site pays for itself

ChordFlow is free to use. The site is supported by advertising and by affiliate links to instrument retailers and music-learning services — if you buy through one of those links, we may earn a commission at no extra cost to you. Affiliate links never change a calculation, a diagram or a recommendation. See our Affiliate Disclosure and Editorial Policy.

How we work

Chord shapes are checked against their notes: a chord is its intervals, and a diagram that does not produce those notes is a wrong diagram. Scales are built from their formulas, keys from their diatonic chords, and progressions from the degrees that define them. If you find an error, tell us — corrections are listed on our Contact page, and we fix verified mistakes.

Browse the tools → · Guitar Chords → · Scales → · Every page on the site →