Afrikaans, Albanian, Arabic, Aragonese, Armenian, Asturian, Azerbaijani, Bangla, Bashkir, Basque, Belarusian, Breton, Bulgarian, Catalan, Chinese Simplified, Chinese Traditional, Corsican, Croatian, Czech, Danish, Dutch, English, Esperanto, Estonian, Extremaduran, Farsi, Finnish, French, Frisian, Friulian, Galician, Georgian, German, Greek, Gujarati, Indian, Hebrew, Hindi, Indian, Hungarian, Icelandic, Ido, Indonesian, Irish, Italian, Japanese, Kabyle, Karakalpak - Latin, Kazakh, Korean, Kurdish - Sorani, Kurdish, Kyrgyz, Latvian, Ligurian, Lithuanian, Macedonian, Malay, Marathi, Mongolian (MenkCode), Mongolian (Unicode), Mongolian, Nepali, Norwegian Bokmal, Norwegian Nynorsk, Pashto, Polish, Portuguese Brazilian, Portuguese Portugal, Punjabi, Indian, Romanian, Russian, Sanskrit, Indian, Serbian - Cyrillic, Serbian - Latin, Sinhala, Vietnam, Slovak, Slovenian, Spanish, Swedish, Tamil, Tatar, Thai, Turkish, Ukrainian, Uyghur, Uzbek, Valencian, Vietnamese, Welsh, YorubaThese translations are partial and for the user interface only.

As a container format, security or size reduction are achieved by looking for similarities throughout the data using a stacked combination of filters.

7-Zip supports a number of other compression and non-compression archive formats (both for packing and unpacking), including ZIP, gzip, bzip2, xz, tar, and WIM.

The utility also supports unpacking APM, ar, ARJ, chm, cpio, deb, FLV, JAR, LHA/LZH, LZMA, MSLZ, Office Open XML, onepkg, RAR, RPM, smzip, SWF, XAR, and Z archives and cramfs, DMG, FAT, HFS, ISO, MBR, NTFS, SquashFS, UDF, and VHD disk images.

The tabs show name, modification time, original and compressed sizes, attributes, and comments (4DOS descript.ion format).

[31] 7-Zip has a LZMA SDK which was originally dual-licensed under both the GNU LGPL and Common Public License,[32] with an additional special exception for linked binaries.

[33][34][35] 7-Zip 16.03 Release notes say that the installer and SFX modules have added protection against DLL preloading attack.

[37] A year later, a severe Remote code execution vulnerability was found on versions prior to 24.07 (CVE-2024-11477), it was fixed on 20 November 2024.

[38] Snapfiles.com in 2012 rated 7-Zip 4.5 stars out of 5, noting, "[its] interface and additional features are fairly basic, but the compression ratio is outstanding".

[39] On TechRepublic in 2009, Justin James found the detailed settings for Windows File Manager integration were "appreciated" and called the compression-decompression benchmark utility "neat".

And though the archive dialog has settings that "will confound most users", he concluded: "7-Zip fits a nice niche in between the built-in Windows capabilities and the features of the paid products, and it is able to handle a large variety of file formats in the process.