There have been reports of malicious actors using URLs very similar to the official site (such as instead of the legitimate 7-zip.org ) to distribute malware disguised as the 7-Zip installer [2, 25]. Always download from the official 7-Zip website [30].

: It primarily uses the LZMA and LZMA2 algorithms to achieve significant file size reduction [5, 11].

: Applications like Keka or The Unarchiver can decompress these files [19].

: Can handle files up to approximately 16 billion gigabytes (GB) in size [6].

: Use 7-Zip or other third-party tools like WinZip or WinRAR [10, 36].

A file is a compressed archive format created with the open-source software 7-Zip [10, 11]. It is known for its high compression ratios, often outperforming the standard ZIP format by 30–70% [11]. Key Features of .7z Files