CrateKey — DJ Key Detector

Detects the musical key of tracks on streaming platforms.

CrateKey detects the musical key and tempo of tracks on music pages — right in a side panel, without leaving the page. • See every analyzable track on a page, pick some (or select all), and analyze them — the queue keeps running while you keep browsing. • Key + BPM are detected **on your machine** with essentia.js (WebAssembly). No audio is uploaded and no account is required. • Each result is colour-coded by its position on the **Camelot wheel**, so an album reads as a field of harmonic colour and you can spot compatible tracks. • A History library groups analyzed tracks by album with cover art and links back to the source page. Works on Bandcamp today; more platforms are on the way.