Interactive Chord Finder, Free Piano Scale and Chord Explorer
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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 existed when I was learning music theory. There's also a growing collection of articles covering diatonic chords, seventh chords, modes, extended jazz harmony, and common progressions.Built with Hugo as a static site. Would love feedback from fellow musicians and music theory nerds.
HN · launched Feb 16, 2026 · 9 upvotes (top 51%) · 0 views
Niche: music education and practice apps · 185 launches, 16 in the last 7 days ▼ -36% · Explore this niche →
Category and tags
- Media & entertainment
- B2C
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 185 launches in music education and practice apps →
Could you build this?
Yes It is a client-side progressive web app implementing deterministic music theory rules, interactive fretboard/keyboard rendering, and basic Web Audio synthesis.
Discussion
5 comments analyzed.
Competitors mentioned: Pianojacq.com
Feature requests: PDF export with chords, MIDI export, Full song composition capability
Competitors
Other products that read as similar to this one : 294 launches clear the similarity bar, closest 8 shown.
Attention rank: #146 of 295 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 103 days after the earliest competitor.
- I made a tool for learning scales, chords, and how to combine them · hn · 2026-05-20 · 36 upvotes · similarity 0.68
- Music Guru · ph · 2026-10-05 · 3 upvotes · similarity 0.67
- Piano Fingers Piano Scale & Chord Tool · ph · 2026-09-16 · 1 upvotes · similarity 0.61
- Circle of Fifths · ph · 2026-10-21 · 1 upvotes · similarity 0.58
- ChordScan · ph · 2026-09-19 · 1 upvotes · similarity 0.57
- OrbKord · ph · 2026-11-09 · 2 upvotes · similarity 0.57
- See chords as flags · hn · 2025-11-05 · 129 upvotes · similarity 0.56
- Open—Shape · ph · 2026-09-16 · 1 upvotes · similarity 0.54
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.