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ISx vs Unshield: catalog facts
ISx	Unshield
Free Free and open source under the MIT licence.	Free Free; the source is published on GitHub.
Windows, Command line	Linux, Command line
Extracts all components of an InstallShield installer Covers versions from 2003 to InstallShield 2021	Opens InstallShield CAB files that general archivers cannot Extracts installer files without running the installer
Command line only Tested on a limited set of installers	Command line only Handles only InstallShield cabinets, not other formats
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.