Altera Quartus Ii 8.1 Web Edition -windows- Free Download _verified_ (2025)

While modern development has moved to newer Intel Quartus Prime versions, version 8.1 remains a critical tool for maintaining older hardware and for educational purposes.

Note: Quartus II 8.1 is 32-bit. It will run on 64-bit Windows, but the USB Blaster driver might require disabling driver signature enforcement. Altera Quartus II 8.1 Web Edition -Windows- free download

Unlike the paid subscription version, the Web Edition is free and includes: While modern development has moved to newer Intel