Larger than web installers (approx. 118MB vs ~2MB) because it packages every component.
Standalone offline installers usually only include English. Other languages require separate Language Pack downloads. Supported Windows Versions
For users needing the most up-to-date, secure, and compatible version of the classic framework, the Official .NET Framework 4.8.1 Offline Installer is the correct choice. What is the .NET Framework 4.8.1 Offline Installer?
As the final iteration, 4.8.1 supports modern versions of Windows but has dropped support for some older operating systems that 4.8 still supported: Download .NET Framework - free official downloads
Best for computers with limited connectivity or for IT administrators deploying to multiple machines across a network.