Cookie Policy

What a cookie is

A cookie is a small piece of data your browser stores for a site you visited. The site can read it back on your next visit to remember a choice you made.

Cookies this site uses

Just one: pdfclean_lang, which remembers the interface language you picked (auto, Chinese or English) for one year. The site writes it itself, and it holds nothing that identifies you.

Cookies this site does not use

No advertising, no third-party analytics or ad cookies, and no cross-site tracking of what you browse.

Third-party services

Page scripts load from unpkg.com, the site is fronted by Cloudflare, and the human check — when it is enabled — uses Cloudflare Turnstile. Those third parties may set essential cookies under their own policies.

Managing cookies

You can delete or block cookies in your browser settings. If you block them, the interface language falls back to your browser's language and everything else keeps working.