If you prefer offline software rather than online tools (SaaS), several reputable options provide installers:

A virus inside a .rar cannot harm your device while it is compressed, but it can execute once you extract and run the file. Recommended Anti-Plagiarism Software (Downloadable)

Be cautious of completely free tools from unknown sites. Some may be unreliable or compromise your manuscript's privacy by copying it for sale elsewhere.

Only download from official developer websites or highly reputable repositories like SourceForge .

Ensure it supports common formats like .docx and .pdf .

Many tools can scan content in over 20 languages.