About

JustMusicTheory.com is a free music theory reference for guitarists and musicians of all levels. Our interactive tools include a library of 300+ guitar chords with visual diagrams, an interactive circle of fifths, interval references, pentatonic scale patterns in every key, mode explanations with fretboard diagrams, chord construction guides, and jazz shell chord voicings.

This site is the theory companion to JustAGuitarTuner.com, our free browser-based guitar tuner and metronome.

How We Stay Free

This site is supported by Google AdSense advertising and Amazon Associates affiliate links. These partnerships allow us to keep all tools free for everyone. Advertising never influences our content or tool accuracy.

Part of PinworthyTools

JustMusicTheory is part of the PinworthyTools network of free utility websites.