7-ZSTar
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7-ZSTar 26.05.1 · fork of 7-Zip · Windows · open source · LGPL v3

Skip “Show more options”. One pass. No .tar on disk. 10× faster than 7z.

Your whole project, packed in seconds. 7-ZSTar is an open-source fork of 7-Zip for Windows: zstd compression, one-pass tar.zst and, with the all-users MSI, a first-level Windows 11 right-click menu.

Download 26.05.1 See the formats

MSI for all users (first-level menu) or just you · portable ZIP · x64 · x86 · arm64

File Explorer icons

Every band is a format.

These are the icons 7-ZSTar gives your archives in File Explorer. The color band shows the extension. Open a .tar.zst and you see the files inside right away, with no .tar to unpack and open first.

8 tar formats build in one pass

    10 tar formats open in one step

      One pass, both ways

      One pass. No .tar on disk.

      Compress to tar.zst and your files stream straight into the archive. Extract it and they stream straight back out, with no .tar written either way. Official 7-Zip can't create a .tar.zst, and it extracts one in two steps, through a .tar. Here, eight tar formats compress in one pass and ten extract in one step.

      Measured, not promised

      Your whole project, packed in seconds.

      10× faster than 7z.

      On three real project folders, tar.zst finished 10 to 18 times faster than 7z. It also came out 15 to 23% smaller than zip, and no slower.

      tar.zst archives are 15 to 27% larger than 7z. If the smallest file matters most, 7z is still the one to pick.

      time / archive size
      Folder Files Raw size zip 7z tar.zst

      zip, 7z and tar.zst all at default settings. 7-ZSTar 26.05.1 x64 (7z.exe), one machine (Intel Core Ultra 7 155H, NVMe SSD), three real project folders, median of 3 runs, 2026-11.

      Screenshots

      The real thing, on Windows 11.

      7-ZSTar file manager with report.tar.zst open, listing the folders and files inside it

      Open a .tar.zst. See the files.

      The file manager opens a .tar.zst as one archive, so there's no .tar to unpack first.

      Windows 11 right-click menu in File Explorer, with 7-ZSTar on the first level and its submenu open

      7-ZSTar on the first level.

      Right-click a file and it's there, no “Show more options”. The submenu extracts in one click, or adds the file to a .tar.zst, .7z or .zip. It comes with the all-users MSI, which needs administrator rights.

      Interface languages

      92 interface translations.

      7-ZSTar ships 92 interface translations, each listed here under its own name. To switch, open the Tools menu, choose Options, then the Language tab.

      • Afrikaans
      • Shqip
      • عربي
      • Aragonés
      • Հայերեն
      • Asturianu
      • Azərbaycanca
      • বাংলা
      • Башҡортса
      • Euskara
      • Беларуская
      • Brezhoneg
      • Български
      • Català
      • 简体中文
      • 繁體中文
      • Corsu
      • Hrvatski
      • Čeština
      • Dansk
      • Nederlands
      • English
      • Esperanto
      • eesti keel
      • Estremeñu
      • فارسی
      • Suomi
      • Français
      • Frysk
      • Furlan
      • Galego
      • ქართული
      • Deutsch
      • Ελληνικά
      • ગુજરાતી
      • עברית
      • हिन्दी
      • Magyar
      • Íslenska
      • Ido
      • Bahasa Indonesia
      • Gaeilge
      • Italiano
      • 日本語
      • Taqbaylit
      • Qaraqalpaqsha - Latın
      • Қазақша
      • 한국어
      • Kurdî
      • کوردی
      • Кыргызча
      • Latviešu
      • Zeneize
      • Lietuvių
      • Македонски
      • Bahasa Melayu
      • मराठी
      • Монгол хэл
      • ᠮᠤᠩᠭᠤᠯ ᠬᠡᠯᠡ
      • नेपाली
      • Norsk Bokmål
      • Norsk Nynorsk
      • پښتو
      • Polski
      • Português Brasileiro
      • Português
      • ਪੰਜਾਬੀ
      • Română
      • Русский
      • संस्कृत
      • Српски - ћирилица
      • Srpski - latinica
      • සිංහල
      • Slovenčina
      • Slovenščina
      • Español
      • Kiswahili
      • Svenska
      • Тоҷикӣ
      • தமிழ்
      • Татарча
      • ไทย
      • Türkçe
      • Türkmençe
      • Українська
      • ئۇيغۇرچە
      • O‘zbekcha
      • Ўзбекча
      • Valencià
      • Tiếng Việt
      • Cymraeg
      • Yoruba

      Download 26.05.1

      Windows, x64, x86 and arm64. A standard MSI for all users or just you, or a portable ZIP.

      Installer, all users

      Windows 11 first-level menu

      Requires administrator rights

      7-ZSTar-26.05.1-x64.msi Download

      Installer, just you

      No first-level menu 7-ZSTar-26.05.1-x64-user.msi Download

      Portable ZIP

      No first-level menu 7-ZSTar-26.05.1-x64.zip Download

      The installers are not code-signed, so Windows may show a SmartScreen warning the first time you run one; you can check your download against SHA256SUMS on the release page.

      Also for x86 and arm64: 7-ZSTar-26.05.1-x86.msi 7-ZSTar-26.05.1-x86-user.msi 7-ZSTar-26.05.1-x86.zip 7-ZSTar-26.05.1-arm64.msi 7-ZSTar-26.05.1-arm64-user.msi 7-ZSTar-26.05.1-arm64.zip
      Source on GitHub