Defrag98: Windows 98 Disk Defragmenter Simulator Online

Defrag98 is a free browser-based recreation of the Windows 98 Disk Defragmenter that animates a virtual drive’s cluster grid using JavaScript, with four speed settings that mimic the original’s consolidation, forward-drag, and shoving moves. The progressive web app caches its interface, audio and fonts for offline use, runs on phones despite a mock warning, and offers an optional €3 “Buy Me a Coffee” donation.