Privacy
CartonFit has no accounts and no tracking cookies. Everything you enter stays in your browser's local storage. The only data we ever receive is an email you explicitly submit.
CartonFit computes everything in your browser. It has no accounts, no tracking cookies, and nothing to upload by design. The only personal data it can ever receive is an email address you deliberately type into the release-notification form.
Everything you enter — SKUs, components, carton sizes, rates, batches — is processed locally in your browser and saved in your browser's local storage so your work survives a page reload. It is never transmitted to us or to anyone else. Clearing your browser storage erases it; the workbench also offers a one-click reset to sample data.
Release notifications. If you submit your email address to the notification form, we store that address (with a timestamp) for one purpose: to tell you when the paid tier ships. We do not sell, rent, share or profile it. Every message we send includes a way to opt out, and you can ask to have it deleted any time by emailing [email protected].
Email you send us. If you email us, we keep the correspondence as long as needed to handle your question and nothing else.
Nothing else. There is no third-party advertising, no social pixel, no session recording, and no analytics cookies on this site.
This site is served by Cloudflare (Pages and Workers). Requests to the notification endpoint are processed by a Cloudflare Worker that stores the submitted email in Cloudflare's key-value storage. Cloudflare acts as our infrastructure provider; see Cloudflare's own privacy documentation for how it handles request data.
Payments, if and when introduced, will be processed by Paddle (Paddle.com) as Merchant of Record. Payment details go to Paddle, not to us. We would receive only what Paddle shares for order fulfilment (such as your email and license status), used solely to operate the subscription. This page will be updated before that happens.
Material changes to this policy will be announced on this page. Questions or deletion requests: [email protected].
Last updated 2026-09-28 13:53 UTC.