7-Zip has its own archive format called 7z, but can read and write several others. It is developed by Igor Pavlov and was first released in 1999.

LGPL-2.1-or-later with unRAR restriction / LZMA SDK in the public domain ħ-Zip is a free and open-source file archiver, a utility used to place groups of files within compressed containers known as 'archives'. These translations are partial and for the user interface only. 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, Yoruba

7zip portable