privacy

Uploaded files

PDFs you upload for grading are processed in memory and deleted immediately after the response is sent. The server stores nothing. The grade JSON and overlay image are returned to you in the HTTP response; if you want to keep them, save them locally.

Third parties

Grading sends small image crops of each cell to Anthropic's API for handwriting recognition. No other data leaves the server. There are no analytics scripts, no tracking pixels, and no Cloudflare proxy.

Logs

Access logs record truncated IP addresses (last octet removed) and are deleted after 7 days.

My Puzzles

The My Puzzles feature stores your puzzle library in your browser's local storage. That data never leaves your device and the server never sees it.