Open-source 7-Zip is a file archiver with a high compression ratio for packing and unpacking files. It handles many archive formats, offers strong AES-256 encryption for 7z and ZIP files, and adds itself to the Windows right-click menu for quick use.
Platform: Windows. Best for: Compressing, extracting and encrypting archive files. Replaces: WinRAR and WinZip. Verified: October 2026