Since software versions update frequently, you can find the specific or the latest stable version at these trusted sources:
If you specifically need the 6.03 legacy version, check MajorGeeks or OldVersion.com , which maintain archives of older software builds. Quick Tips for Using WinRAR Portable Download File 6.03 Portable.rar
Looking for ? This version is a reliable, classic build of the famous compression tool, perfect for managing .rar and .zip files on the go. Since software versions update frequently, you can find
After downloading the .rar or .zip file containing the portable app, extract its contents to a folder before running the executable ( WinRAR.exe ). After downloading the
Always scan downloaded .rar files with your antivirus software before opening them to ensure the file is safe and hasn't been tampered with by third parties. RAR 6.10.Build103 APK Download - Softpedia
Sites like PortableApps.com often host clean, pre-packaged versions of popular utilities for mobile use.