Which of these would you like?
It is safe, legal, and supports cross-progression with D2R if you buy it later. However, the vanilla classic client is still buggy on ultra-wide monitors.
Websites offering "Free Full Game" downloads for Diablo 2 often bundle the game with: Malware/Adware : Older installers are common targets for hidden scripts. Broken Multiplayer
Before you click that "Download Now" button, you need to understand the truth.
Boosting the game from 640x480 to 800x600 (a massive leap at the time!). The "Best" Way to Play: Diablo II: Resurrected vs. Classic