Privacy

No accounts. Nothing to sign up for. No login, no profile, no password, so there is no account record of you anywhere.

Your progress stays in your browser. Puzzles played, your streak, finished labs, course progress and notes, and the education notice all sit in this browser's local storage. None of it reaches Tidlo or anyone else, and none of it follows you to another device. Clear your site data and it is gone.

The email form is optional. Leave your address and it goes to Kit, the mailing service Tidlo uses, with double opt-in: nothing is sent until you confirm from your inbox. It is the only personal data Tidlo collects, and every email carries an unsubscribe link.

No analytics, no tracking. Tidlo runs no analytics and sets no tracking or advertising cookies. Fonts come from Tidlo itself. Tidlo sets no cookies of its own. If you visited during the private preview, the cookie that unlocked it does nothing now and carries nothing about you.