Theory tools

Ten tools to explore music theory on the fretboard and tone building, computed on the fly, no account or saving needed.

Circle of fifths

Visualize major keys and their relative minor, with direct access to sheets in each.

Find a specific note across the 6 strings and the first 12 frets.

Choose a chord: discover every other chord that naturally works with it.

Browse 10 scale types across 12 keys, with 5 computed positions for each.

All 12 power chords, one easy-to-move shape across the whole fretboard.

See how the 5 shapes C, A, G, E, D let you play the same chord anywhere on the neck.

Place two chords side by side to compare their fingerings at a glance.

Check a few known notes, instantly find the scales that contain them.

Display or print the most common open chords, all at a glance.

Discover the reference order for a pedal chain, and test your own.