The online installer can be 50MB to 500MB depending on the language. If you have 20 computers in a rural school with 2Mbps internet, downloading the same 200MB file 20 times is inefficient. The offline installer allows you to download the CAB or ISO file once and deploy it to 20 machines via USB or network share.
Run the setup.exe from the downloaded source folder on a target machine. office 2021 proofing tools offline installer
Developers with Visual Studio subscriptions can access the "Office 2021 Proofing Tools Kit" for development and testing purposes. The online installer can be 50MB to 500MB
| File Name | Office2021_ProofingTools_x64_offline.exe |
|-----------|--------------------------------------------|
| Version | 16.0.14326.xxxxx (latest as of [Date]) |
| File Size | ~1.2 GB (varies by language selection) |
| Format | Self-extracting executable / ODT + ISO | Run the setup