Privacy Policy
The short version: we collect almost nothing.
What we don't collect
- No accounts, names, or email addresses — the site has no sign-up.
- No advertising or cross-site tracking cookies.
- Code you type into the playgrounds is never sent to our servers; it runs in your browser.
Your learning progress
Lesson and quiz progress is stored in your browser's local storage on your own device. It never leaves your browser, and you can delete it at any time by clearing your browser's site data.
Standard technical processing
- The site is served through Cloudflare, which processes standard connection data (such as IP address and requested URL) to deliver pages and protect the site.
- Fonts are loaded from Google Fonts, which receives your browser's font request.
Children
The For Kids section works the same way as the rest of the site: no accounts and no personal data collection.
Changes
If this policy changes, the updated version will be published on this page.