Privacy policy

Last updated November 13, 2026.

There is no account

Sudoku24x7 doesn't have user accounts, sign-in, or a server-side database of your activity. Everything described below is stored only in your own browser, on your own device.

What we store, and where

This site uses your browser's localStorage — a storage area built into your browser, not a cookie, and not transmitted to us or anyone else — to save:

• Your settings (input mode, mistake checking, highlight preferences, and similar).
• Your in-progress state for a specific puzzle, so refreshing the page doesn't lose it.
• Local stats — games played, win rate, best and average time per level, and daily streak.

None of this is sent to our servers, because we don't have a server component that would receive it — this is a static site. If your browser blocks storage (private/incognito mode, or storage disabled), the site still works; it just won't remember your progress between visits. You can clear all of it at any time through the stats panel's export/reset option, or by clearing your browser's site data for this domain.

Analytics

We plan to use Google Analytics to understand overall traffic (which pages get visited, roughly how people navigate the site) — this is not active in the current build. Once it is enabled, this section will be updated to describe exactly what Google Analytics collects (typically: pages visited, approximate location derived from IP address, device/browser type, and similar) and how to opt out, before it ever goes live, not after.

Advertising

This site has reserved, empty ad slots in its layout, but no ad code runs in the current build — every ad slot is a fixed-size placeholder box with nothing loaded into it. If that changes in the future, Google (or another ad network we choose) would act as a third-party vendor using cookies to serve personalized ads based on your visits to this and other sites. At that point, this policy will be updated with specifics, and visitors in the EEA, UK, and Switzerland will see a consent prompt before any personalized-ad cookie is set. You'll always be able to opt out of personalized advertising through Google's Ads Settings once ads are live, and through the consent prompt itself at that time.

Cookies

See the cookie policy for what's actually set today versus what a future analytics or ads integration would add.

Contact

Questions about this policy: see contact.