Interactive Chord Finder, Free Piano Scale and Chord Explorer
I built a free, browser-based tool for exploring scales, modes, and their diatonic chords. Pick any root note and scale (major, natural minor, all seven modes, and 70+ other scales) and instantly see which chords (triads, 7th, 9th, etc.) belong to that key. It also includes a built-in sequencer so if you've found interesting chords for your scale, you can arrange them into a progression and hear how they flow together. No need to switch between a theory reference and a DAW just to test whether a ii–V–I sounds right in your preferred scale. No signup, no ads, no paywall, just a tool I wished…
Interactive Chord Finder, Free Piano Scale and Chord Explorer launched on February 16, 2026 with 9 votes, #1,122 of 16,627 launches that month and more than 75% of that year's launches.
What it does
Interactive scale and chord explorer with piano keyboard and guitar fretboard — find diatonic chords for any scale or mode
Please enable JavaScript to use the interactive chord finder. Get music theory tips, new scales and chords, and site updates delivered to your inbox. Learn how secondary dominants and borrowed chords let you step outside a key for dramatic harmonic colour. Understand … Learn how the five open chord shapes (C, A, G, E, and D) connect across the entire guitar neck. Understand the CAGED … Master the ii–V–I, the most important chord progression in jazz. Learn how it works harmonically, how to voice it onfrom interactivechordfinder.com
In the maker’s words, at launch
I built a free, browser-based tool for exploring scales, modes, and their diatonic chords. Pick any root note and scale (major, natural minor, all seven modes, and 70+ other scales) and instantly see which chords (triads, 7th, 9th, etc.) belong to that key. It also includes a built-in sequencer so if you've found…
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I made a tool for learning scales, chords, and how to combine themMay 2026 · projects.alesh.com · ▲36This 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
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