Inno Setup is a free installer for Windows programs by Jordan Russell and Martijn Laan. First introduced in 1997, Inno Setup today rivals and even surpasses many commercial installers in feature set and stability.
Key features:
Support for every Windows release since 2006, including: Windows 11, Windows 10, Windows 10 on ARM, Windows Server 2019, Windows Server 2016, Windows 8.1, Windows 8, Windows Server 2012, Windows 7, Windows Server 2008 R2, Windows Server 2008, and Windows Vista. (No service packs are required.)
Extensive support for installation of 64-bit applications on the 64-bit editions of Windows. The x64, ARM64 and Itanium architectures are all supported.
Extensive support for both administrative and non administrative installations.
Supports creation of a single EXE to install your program for easy online distribution. Disk spanning is also supported.
Standard Windows wizard interface.
Customizable setup types, e.g. Full, Minimal, Custom.
Complete uninstall capabilities.
Installation of files:
Includes integrated support for "deflate", bzip2, and 7-Zip LZMA/LZMA2 file compression.
The installer has the ability to compare file version info, replace in-use files, use shared file counting, register DLL/OCX's and type libraries, and install fonts.
Creation of shortcuts anywhere, including in the Start Menu and on the desktop.
Creation of registry and .INI entries.
Running other programs before, during or after install.
Support for multilingual installs, including right-to-left language support.
Support for passworded and encrypted installs.
Support for digitally signed installs and uninstalls, including dual signing (SHA1 & SHA256).
Silent install and uninstall.
Unicode installs.
Integrated preprocessor option for advanced compile-time customization.
Integrated Pascal scripting engine option for advanced run-time install and uninstall customization.
Full source code is available from GitHub.
Tiny footprint: only about 1.5 mB overhead with all features included.
All features are fully documented.
Used by Microsoft Visual Studio Code and Embarcardero Delphi.
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