Last Updated: August 2026
Classkraft operates entirely serverless and on-device. All image processing, color quantization, and vectorization occur locally within your browser using a Web Worker. Your source photos and generated booklets are never uploaded to any server. There is no account, no sign-in, and no analytics.
Classkraft saves your light/dark theme preference and your selected language in your browser's local storage. It also saves your current project — the photo you picked and your settings — in your browser's IndexedDB, so that closing the tab does not lose your work.
All of this stays on your device. Nothing is uploaded, and Classkraft cannot read it. Since generating a mural or poster can take a moment, Classkraft also saves the result you last generated, so it is still there if you close the tab and come back. Use the “Change image” button on the photo, or “Remove”, to start a new project and delete everything saved so far; clearing your browser's site data for Classkraft also removes everything.
The header includes an optional link to Ko-fi if you'd like to support the project. Ko-fi is an independent third-party site with its own privacy policy; Classkraft does not receive or process any information from it.
If you have any questions about this Privacy Policy, please contact us at info@classkraft.com.