Privacy

Updated 15 September 2026.

Your disk stays yours

The animation uses a randomly generated disk map held in browser memory. It does not read, upload, edit, or delete any files on your device.

Cookies and tracking

Optional Google Analytics is described below. Your selected interface appears in the page URL so that a link can open directly in MS-DOS mode. We serve the interface fonts from this site.

Hosting

Like other websites, the hosting service receives the information needed to deliver the page, including your IP address, request time, requested URL and browser headers. The simulator does not send the contents of its disk map to a server.

Sponsor links

If a sponsor link is displayed, it is labeled Advertisement. It is an ordinary link: the destination website receives your request only when you follow it and has its own privacy practices. No sponsor tracking script is loaded by this version of Defrag.

Operator reporting and Google account access

JustDefrag Reports is used by the site operator to read this site’s Google Analytics and AdSense data. Public visitors do not sign in to this tool or grant access to their Google accounts. The operator authorizes read-only access to reporting data, including aggregate visits, simulator usage, traffic sources and advertising performance.

The reporting tool stores its Google authorization credentials privately. Report snapshots are stored privately on the reporting server and the operator’s computer, and summaries are sent through our delivery service to the designated JustDefrag WhatsApp group, where group members can read them. These reports are not published on this website. Stored reports remain until the operator deletes them. The operator can revoke the app’s access in Google Account settings and delete the saved credentials and reports.

Optional analytics

If you allow analytics, Google Analytics uses cookies to measure page visits, interface choices, simulation starts and completions, and clicks on sharing and session controls. Google receives technical information such as browser details and your IP address when these requests are made. The Google Analytics tag loads only after you allow analytics. Advertising personalization and Google signals are disabled for this analytics setup. This privacy page does not load analytics or advertising scripts.

Your analytics choice is stored in this browser for 180 days. Use Analytics choices on the simulator page to change it; declining stops further analytics events and clears this site’s Google Analytics cookies. Advertising choices are managed separately. Learn more in Google’s privacy policy.

Contact

For privacy questions or requests, email info@justdefrag.com.