Inno Setup is a popular program for making software installations. Inno Setup Unpacker is a console application to verify and get files out of the self-extracting executable.
Since there have been no updates of the SourceForge project since 2020 and the source codes are not yet adapted to the current Delphi versions (Unicode strings are the native type since Delphi 2009), I have modified them so that they can be compiled with newer Delphi versions (tested with Delphi 10 Seattle). In addition, some errors have been fixed and new command line options (-l and -u) were added, as well as exit codes to support the use in batch files.
Publisher’s description
What is innounp?
innounp by Jürgen Rathlev is open-source Windows software in the archivers category. It ranks 39th by popularity among archivers in this catalogue. It is written in Pascal.
Installation and requirements
The publisher provides Portable installers for 32-bit Windows. The main installer is 628 KB. It runs without installation (portable).
Updates and version history
The current version is 2.70.1, released on July 24, 2026. The version history goes back to May 27, 2025: 21 releases, all linked to the official files. That is about 18 releases a year.
Popularity and file types
The source code on GitHub (jrathlev/InnoUnpacker-Windows-GUI) has 343 stars. Similar programs include 7-Zip, PeaZip and WinRAR.
Project description on GitHub: “Inspect and unpack InnoSetup archives”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Portable: runs without installation
- Frequent updates (about 18 a year)
- Small download (628 KB)
Cons
- No native ARM64 build
- 32-bit only
In short: innounp is an open-source archiver tool for 32-bit PCs. It is actively maintained.
Is innounp safe to download?
- The file is served by raw.githubusercontent.com; check that it is the publisher’s official mirror
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
D5514CAC741F12CA94F642EACD30D514D820DCE016E4D016325413DF472C34EA· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 21 versions ›21 versions over 1 year · about 18 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 2.70.1Latest | July 24, 2026 | 628 KB | 32-bit ZIP |
| 2.67.11 | July 13, 2026 | — | 32-bit ZIP |
| 2.67.10 | July 12, 2026 | — | 32-bit ZIP |
| 2.67.9 | April 30, 2026 | — | 32-bit ZIP |
| 2.67.8 | April 22, 2026 | — | 32-bit ZIP |
| 2.67.7 | April 8, 2026 | — | 32-bit ZIP |
| 2.67.6 | March 28, 2026 | — | 32-bit ZIP |
| 2.67.5 | March 23, 2026 | — | 32-bit ZIP |
Install from the command line
Silent install ›winget install --id JurgenRathlev.innounp -escoop install main/innounpProgram files (.exe): innounp.exe
Related guide: How to use winget: install and update apps
Information
- Publisher
- Jürgen Rathlev
- Category
- Archivers
- Licence
- MPL or LGPL-2.0-or-later
- Price
- Free
- Source code
- github.com/jrathlev/InnoUnpacker-Windows-GUI
- Written in
- Pascal
- Requires
- Windows 11 / 10
- Architecture
- 32-bit
- Installer
- Portable
- Version
- 2.70.1
- Released
- July 24, 2026
- Added to the catalogue
- May 27, 2025
- Versions listed
- 21
- Updates / year
- 18.1
- GitHub stars
- 343
- GitHub forks
- 46
- Website
- rathlev-home.de
- winget ID
- JurgenRathlev.innounp
- Scoop package
- main/innounp
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is innounp free?
Yes. innounp is open-source software under the MPL or LGPL-2.0-or-later licence.
Is innounp safe to download?
The download comes from raw.githubusercontent.com; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install innounp with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Does innounp run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 32-bit version through emulation.
Where can I download an older version of innounp?
The versions page lists all 21 versions with links to their official installer files, back to May 27, 2025.
Can I use innounp without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to innounp?
7-Zip, PeaZip, WinRAR, Zstandard and UPX. The alternatives page compares them.
