Log in to spotify.com/account/privacy, scroll to the bottom and request "Extended streaming history". Spotify emails you a zip file within ~3 weeks. That's the file you drop here. (The basic "Account data" zip only covers the last year — you want the extended one for a real Wrapped.)

Your listening data stays in your browser — Yearstack has no server that processes or stores it. Refreshing the page wipes everything. There are three outbound calls and you can opt out of each: (1) cover art lookups send track/artist names to Deezer's and iTunes' public catalogs (no personal data) — stay offline while loading to skip; (2) Last.fm scrobble fetching sends only your public username (skip by not picking the Last.fm tab); (3) "Share Online" uploads your rendered Wrapped to wrap.yearstack.com so you can share a URL — only when you click that button.

Spotify's official Wrapped uses some private signals (skip behaviour, listening segments, podcast separation) we can't see. Numbers here come straight from your raw history — sometimes higher, sometimes lower than Spotify's. Plays under 30 seconds are still counted; phantom multi-week records are capped at 10 minutes per play.