Spotify Search works; Spotify Audio-Features may be blocked (403). This version uses the track’s preview_url (when available) to estimate key/major-minor in-browser.
Spotify + Search
Not connected
Tip: you can hardcode it in the script if you don’t want to paste each time.
Redirect URI must be set in your Spotify app to:
Auto detection rule: Works automatically only if Spotify provides a preview_url (30s clip). If not, use the manual controls below.
Manual override
Always available
Scale: C Major
Click ▾
Guitar
Bass
Ukulele
Piano
Diagram
RootScale noteOther
Detection note: This MVP uses a lightweight chroma-based estimator on Spotify’s preview clip. It’s a heuristic — good enough for many pop tracks, but not “studio-grade” yet.