Privacy & data

Sack Stack is a free bag packing planner with weight tracking. It is a fully client-side app that runs entirely in your browser — there is no account, no login, and no server-side database.

What we collect

Nothing personal. The site does not collect, store, or transmit your trips, items, names, or any other content you enter. We do not use analytics or tracking cookies.

Where your data lives

All trips, bags, carriers, and items are saved in your browser's localStorageon this device only. They are never sent over the network. If you open the site on another device or browser, you will not see your trips there.

Backups

Browsers can clear localStorageat any time — privacy tools, disk cleanup, or "clear site data" will erase your trips. Before any important trip, use Export from the home screen to download a JSON backup, then use Import to restore it later.

Sharing

When you copy a share link for a trip, the trip data is encoded into the URL fragment (the part after #). URL fragments are not sent to any server; the recipient's browser decodes the trip locally. Only share the link with people you trust.

Hosting

The site is served as static files. The host can see standard request metadata (IP address, user agent) in their server logs, like any website, but receives none of your trip content.

Transparency

Sack Stack is open-source software. The full source code is public, so you can verify exactly how the app handles your data, what it sends to servers (nothing, for trip content), and what it tracks (also nothing). The privacy claims above are not just promises — they are inspectable in the code.

Clear everything

Wipe all Sack Stack data from this browser. This cannot be undone — export a backup first if you want to keep your trips.