Privacy

This preview is a static tutorial site. You do not need an account.

What the site does

The site does not include analytics, live advertising, tracking pixels, cookies, browser storage, upload fields or feedback submission forms. Search filters the tutorials in your browser and does not submit your keywords. The interactive diagram runs in your browser; it does not send your folding progress to a server. Fonts, scripts and diagrams are served with the site, without third-party embeds.

Advertisement layout testing

Real ads are not enabled. The optional ?adPreview=1 layout test displays clearly labeled, local mock boxes only. It does not contact an advertising network or track visitors. Normal pages show no ad placeholders. Any future live advertising requires a separate integration and an updated privacy notice.

Hosting and ordinary web requests

The public preview uses Cloudflare Pages. Your browser requests pages and assets from Cloudflare, which may process connection information such as your IP address and request metadata to deliver and secure the service. See Cloudflare’s privacy policy. This notice does not promise zero infrastructure logging or a specific retention period.

The preview is publicly accessible without Cloudflare Access authentication. Anyone with the link can visit or share it. The noindex request asks search engines not to index the pages; it does not make them private. The source repository remains private.

Links and feedback

Historical sources open external websites, which have their own privacy practices. They are only contacted when you follow their links. Feedback is shared through the conversation where you received this preview, not collected on this site.

How to give preview feedback →

Updated October 9, 2026. This notice must be reviewed if hosting or data collection changes.