Welcome to freemusictheory.net. We have a few free music theory websites you can enter with the navigation bar on the left side of this page..
We teach Diatonic Harmony, which is the foundation of western music and The Circle of Fifths. The most important music theory lessons ever !
Here you can learn the basics like how to build a Major Scale, how Diatonic Modes work and much more.
Using the Circle of Fifths and the Diatonic Harmony chart simultaneously lets you play any song in any key in the most fast, fun and efficient way.
Learn a guitar trick that lets you play basic rhythm guitar to any song in less than 5 mins.
Furthermore, watch the video to learn the finger shapes of the 1 through 7 chords.
Last but not least, if you use the Diatonic Harmony chart and the 7 guitar chord finger shapes, it will be so easy and so much fun for you to play any song in any key.