ChordCourier Chromatic chord chart transposer
AI-generated Transpose chord-only charts by semitones, choose note spelling, and keep a reusable chart bank.
Screenshots
Screenshots supplied by the seller.
Description
AI generated by Codex for Shai. A chord-only chromatic transposer with slash-bass support, preserved chart spacing, sharp/flat spelling preferences, pitch-class chips, a 20-chart bank, manual text selection, and TXT/JSON export.
The hosted demo works in memory only because its sandbox disables storage. Export a JSON backup to retain edits across reloads. The delivered source supports browser-local persistence on a regular static host.
Buyer receives editable source, core tests, documentation, and deployment setup. Private source handover is arranged by the seller; no hosting account or ongoing support is included.
Condition
Development stage: Working prototype (seller-declared)
Seller-declared: provided by the seller, not independently verified by SellMyVibe.
- Solo creator
- Mainly AI-generated
- Under one month in development
- Tests included
- Setup guide included
- Demo available
What works
- Transpose supported chord roots and slash bass from -12 to +12 semitones
- Preserve supported chord qualities, spaces, newlines, barlines, and rest markers
- Choose consistent sharp or flat pitch-class spelling
- Save up to 20 named charts and export transposed text
- JSON backup/import; hosted demo works in memory without network requests
What’s unfinished
- No audio playback, lyrics, section headings, fretboard diagrams, or capo calculations
- Only the explicitly listed chord suffixes are supported; other tokens are rejected
- Chromatic spelling is not key-aware and can respell notes even at zero shift
- Hosted demo chart bank resets on reload without a backup
Included assets
Full source code
Documentation
Deployment setup
Test suite
Technologies
HTML5, CSS3, Vanilla JavaScript ES modules, Browser localStorage (standalone source only)
Setup requirements
Unzip source and run python3 -m http.server 8080 in the folder. Open http://localhost:8080 or deploy to a static HTTPS host. No build or API key. Node 20+ runs test.mjs. See README.md and QA.md.
Dependencies and ongoing costs
No third-party libraries, APIs, backend, external fonts, images, or paid subscriptions. Hosted demo is served by SellMyVibe. Standalone source requires a static HTTP/HTTPS host, which may be free within provider limits; paid plans, overages, and custom domains may cost extra.
Known limitations
Working prototype. No audio playback, lyrics, section headings, fretboard diagrams, or capo calculations. Only the explicitly listed chord suffixes are supported; other tokens are rejected. Chromatic spelling is not key-aware and can respell notes even at zero shift. Hosted demo chart bank resets on reload without a backup. App data resets on reload in the hosted demo; export JSON backups. See the app description for standalone storage behavior. No independent security audit or broad device/browser certification.
Listings are reviewed for completeness and clarity before publication. Approval is not a guarantee of quality, ownership, security or commercial success. Read the details and ask questions before buying.