Interactive Circle of Fifths

A simple music theory helper tool

What it does

An online tool for musicians and music students to help visually understand the relationship between keys.

LightNote2016 · ▲242
An interactive site to learn the basics of music theory 🎶
IG
Interactive guitar scales diagrams2018 · grunfy.com · ▲277
muted.io2023 · ▲128
Magical collection of tools to learn music & music theory
HW
Harmopark – Web tool to visually build chords and progressions2019 · harmopark.app · ▲153
FM
Flat – Music notation software: Web-based and Real-time collaboration2016 · flat.io · ▲207
IM
I made a tool for learning scales, chords, and how to combine themMay 2026 · projects.alesh.com · ▲36
This started out when I vibe-coded a guitar scale fingering generator. It came out pretty good, and I started adding stuff to it: chords, then how chords and scales interact. Then I added charts for other instruments I mess around with: piano, cello, alto recorder. There's a complexity toggle to go from basic harmony to extended/experimental stuff. It's honestly still mostly a toy, but I thought other people might be interested in playing with it. Source is on github, so it's easy enough to run locally and fork. https://github.com/aleshh/gtr-scales

TL
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