Privacy

Your entry is calculated locally

The calculator processes your identifier in this browser. It does not submit it to a server, put it in the page URL, write it to browser storage or request book metadata. Reloading the page restores the example instead of retaining your last input.

Exports are your choice

Copy notes asks the browser to copy the current diagnostic to your clipboard. The text and JSON buttons request a local download containing the identifier and result. The tool does not upload those files. Your browser, clipboard manager, download folder or device backups may retain data you choose to export.

Hosting is separate

Cloudflare Pages serves this website and necessarily receives ordinary request information such as IP address, requested path and browser/network details. Browser-local calculation does not mean an anonymous hosting connection. Read Cloudflare's privacy policy for its handling of service data.

Current measurement and advertising settings

This source release contains no analytics beacon, advertising loader or consent-platform script. Publisher verification metadata and ads.txt identify the intended publisher but do not load ads. New measurement or advertising scripts require an updated disclosure and appropriate exact-site configuration before activation.

Contact and external links

The public contact address is a shared forwarding alias. Choosing to email it sends your message through your mail provider and the forwarding service to the operator's private mailbox. Email is optional and separate from the calculator. External source links open independent websites whose handling of requests is governed by their own policies.

Questions can be sent using the address on the contact page. Avoid sending personal, financial or confidential data.