Inno Setup 7.0.2

Inno Setup: Lightweight, Scriptable Installer Creator for Windows

Inno Setup is a mature, open-source installer system for Windows that has been widely adopted by developers since 1997. Designed to produce compact, single-executable installers, it combines a small footprint with powerful scripting and customization features, making it ideal for both simple applications and complex deployment scenarios.

Why Developers Choose Inno Setup

Inno Setup stands out for its balance of simplicity and control. The engine produces a single EXE installer that follows the familiar Windows wizard interface, while an integrated Pascal scripting language and built-in preprocessor let developers implement advanced logic, custom dialogs, and conditional installs without external dependencies. The project is actively maintained and its source code is available on GitHub, supporting transparency and community contributions.

Powerful Scripting and Customization

The embedded Pascal script engine enables fine-grained control over install and uninstall behavior, custom pages, and runtime decisions. Developers can automate tasks, evaluate system conditions, and interact with the Windows API to handle complex workflows. The preprocessor simplifies repetitive tasks and supports modular script development for larger projects.

Installer Size, Compression, and Code Signing

Compression with LZMA/LZMA2 (7-Zip) keeps installers small without sacrificing performance. Inno Setup supports code signing of installer executables and installed files, which improves trust and reduces SmartScreen or UAC warnings. Options for encrypted and password-protected installations further secure distributed packages.

Deployment and Automation Features

• Silent and unattended installation/uninstallation modes for automated deployments
• Support for both administrative and non-administrative installs
• Custom actions, DLL registration, COM server support, and file association management
• Built-in uninstaller generation with clean removal of files, shortcuts, and registry entries

Compatibility and Platform Support

Inno Setup runs on modern Windows releases and produces installers that work across 32-bit and 64-bit systems, including recent Windows 10 and Windows 11 builds and ARM variants. This broad compatibility makes it suitable for desktop, server, and cross-architecture deployments.

Localization, Branding, and User Experience

Multilingual installer support and customizable wizard pages let developers present localized license agreements, EULAs, and branded graphics. Control over setup types, custom prompts, and shortcut/registry behavior helps deliver a polished user experience tailored to target audiences.

Extensibility and Community Resources

A rich ecosystem of third-party tools, examples, and extensions is available, including the popular QuickStart Pack that bundles helpful scripts and utilities to accelerate setup creation. The active community and open-source repository provide templates, IDE integrations, and continuous improvements.

Key Features at a Glance

• Free, open-source installer system with source on GitHub
• Single EXE installers with standard Windows wizard UI
• Integrated Pascal scripting engine and preprocessor for advanced customization
• 7-Zip LZMA/LZMA2 compression for small installer sizes
• Support for code signing, encrypted/passworded installers, and multilingual packages
• Silent/unattended install and uninstall for automation and deployment
• Wide Windows compatibility, including 32-bit, 64-bit, and ARM targets
• Comprehensive file, registry, INI, and shortcut management
• Extensible via community tools and the QuickStart Pack

Who Should Use Inno Setup

Inno Setup is ideal for independent developers, small teams, and ISVs who need a reliable, scriptable installer without licensing costs. It scales from simple installers to enterprise-grade deployments where automation, signing, and silent installation are required.

Getting Started

Download packages, the QuickStart Pack, and documentation are provided by the official Inno Setup project site. Examples and ready-made scripts accelerate learning, while the community-maintained repositories and plugins help adapt Inno Setup to unique distribution workflows.