upx
UPXALL
An application that can run recursively in a directory, compressing data more>> An application that can run recursively in a directory, compressing data
UPXALL will simplifies the compression process of UPX. Just run* it, drag and drop** the folder that contains the executables to be compressed on UPXALL window press enter, select a compression method and press enter one more time. UPXALL will run UPX recursively on every subfolder first decompressing already compressed files and then recompressing them with the selected method.
UPXALL is open-source software written in Lua. Fell free to alter the code to suit your needs.
Drag and drop will not work, you will have to type the full path to the directory that contains the executable files.
Note: This is beta version, you might encounter some problems with international characters in the path

UPX 3.01
UPX is a free, portable, extendable, high-performance executable packer. more>> UPX is a free, portable, extendable, high-performance executable packer for several different executable formats. It achieves an excellent compression ratio and offers very fast decompression. Your executables suffer no memory overhead or other drawbacks because of in-place decompression. UPX uses the NRV compression library for compression services. A compatible but somewhat less efficient OpenSource implementation is available through the UCL compression library.
Features
- excellent compression ratio: typically compresses better than WinZip/zip/gzip, use UPX to decrease the size of your distribution !
- very fast decompression: ~10 MB/sec on an ancient Pentium 133, ~200 MB/sec on an Athlon XP 2000+.
- no memory overhead for your compressed executables because of in-place decompression.
- safe: you can list, test and unpack your executables. Also, a checksum of both the compressed and uncompressed file is maintained internally.
- universal: UPX can pack a number of executable formats.
- portable: UPX is written in portable endian-neutral C++
- extendable: because of the class layout its very easy to add new executable formats or new compression algorithms
- free: UPX is distributed with full source code under the GNU General Public License, and may be used freely even with commercial programs.
The main news in version 3 are:
- optional LZMA compression
- support for BSD systems<<less

GUI4UPX 2
GUI4UPX is launched to be an easy to use front end for the well known Ultimate Packer for eXecutables, UPX. more>>
GUI4UPX 2 is launched to be an easy to use front end for the well known Ultimate Packer for eXecutables, UPX. With this front end you can choose file, set the compression ratio and run the process. You can decompress files too. There is a visible command for UPX. Since version 2.0 there is a possibility to process more than one file. With Maxiorel GUI4UPX you can create BAT file with prepared commands.
Requirements: Windows 95/98/Me/NT/2000/XP/2003 Server
UPX-iT 1.6.2
UPX-iT is a free Win32 GUI for UPX packer ! more>>
UPX, a free DOS command-line tool, is an extendable, portable, high-performance executable packer for many different executable formats.
The primary use for UPX-iT is for software developers to compress their programs before distributing them to their customers or posting them on the internet.
This makes the final file sizes much smaller (up to 75% smaller) for faster file transfers. However, the average user can use the tool to compress files on their systems to increase free disk space.

UPX Tool 1.02
UPX Tool is designed to compress and decompress your EXE and DLL files. more>>
UPX Tool 1.02 is designed to compress and decompress your EXE and DLL files. This program compresses the size of executable files. It works for DOS programs, and DLL's. Also reductions of over 50% are often possible.

Free UPX 1.2
Free UPX is an advanced graphical interface for the UPX (Ultimate Packer for eXecutables). It offers easy access to all documented and undocumented UPX parameters without the need for command line usage. more>>
Free UPX is an advanced graphical interface for the UPX (Ultimate Packer for eXecutables).
It allows you to compress (and decompress) files produced according to Microsoft Portable Executable and COFF Specification (EXE, DLL, OCX, BPL, CPL and other). It offers easy access to all documented and undocumented UPX parameters without the need for command line usage.
The Free UPX interface is very simple and user-friendly. To compress executable files, just drag & drop them into main window, select proper profile from list, and click the COMPRESS button.
Free UPX is designed for UPX 3.04w - the last stable version in October 2009.
The most important features:
- Compression and decompression executable files (EXE, DLL, OCX, BPL, CPL, SYS, AX, ACM, DRV, TLB and other).
- Easy acces to all UPX command-line parameters.
- Displaying detailed informations about compressed files: original file size, compresson ratio, UPX version, compression level and other.
- Predefined UPX profiles for beginners. Advanced users can define custom profiles.
- Dont need any installation. Just extract ZIP archive and click fupx.exe file.
- Portability. This program can be run from portable devices. All settings are written to INI file.
- Shell integration (optional).
- 100% freeware! - for private and commercial use. There are no limitations, no adware, no spyware.<<less
UPX Tool+ 1.1
UPX is a command-line tool that helps you reduce the size of both EXEs and DLLs more>>
No additional software is required for the compressed EXEs or DLLs to work. An additional benefit is a potentially faster loading program due to fewer read cycles to load the EXEs/DLLs.
UPX Tool+ is a GUI wrapper for UPX for the command-line intimidated. It includes UPX v3.00 and it is able to compress with LZMA (a better file compression format).
UPX Tool+ is completely portable.
Jazz-UPX 1.00
Provides an user-friendly interface with all the options available to choose from more>> Provides an user-friendly interface with all the options available to choose from
The Jazz-UPX application was written to be used with UPX (Ultimate Packer for eXecutables). It provides an user-friendly interface with all the options available to choose from.
Main features:
- Drag and drop function.
- Shell extension.
- Extra textbox for additional options in future versions of UPX.
- Clear description of the various functions and options when you move your mouse over them.
- Saves your settings and able to revert to Default.
- Multiple files support for compression and decompression.
- Recursive folder scanning for multiple files option.
System requirements:
- UPX included in the package
Enhancements:
- Option to include or exclude subfolders for multiple files
- Changed some codes for more accurate file scanning
UPXN 1.4.0.4
GUI for UPX (Ultimate Packer for eXecutables). more>>
Enhancements:
- Drag & drop file on Dialog is Enabled
- Dialog is now TOPMOST over all others
- Internal images added and the another changed
- Added Error message for non applications opened
- Added estimate of savings before Compression
- Check for suspicious file maybe compressed by other compression program that's not UPX
Requirements: upx.exe
<<lessUPXGUI 1.1.0
UPXGui is a graphical user interface for UPX (packer for executables - a command line tool). more>>
UPXGui uses the version 2.03 of UPX.
UPXGui is used to compress Windows 32-bit executables or DLLs. Very useful to reduce the the size of your software distribution.
UPXGUI is also easy-to-use, small and simple.
FindUPX 1.0c
FindUPX - search through a bunch of files and report any files that have been compressed with the UPX executable compressor more>>
I needed this because I compressed a bunch of windows DLLs which then stopped compiled windows help files from displaying any more. I couldnt find the DLL that I had compressed, so wrote this to find it.
JLCs UPX GUI 1.0
JLCs UPX GUI application was designed to be a simple GUI for the executable packer UPX more>>
Upx Gui 1.7.0.0
A very small software application that offers a front-end for the Upx program more>> A very small software application that offers a front-end for the Upx program
Well, Upx Gui is exactly what its name says, a front-end for the Upx application.
Upx Gui features context menu integration, compression settings and an auto shutdown option.
The program now also scans the selected file with the help of PEid. After this scan, it determines the thing to do, compress, or de-compress.
The size is updated accordingly.
Enhancements:
- Added some more file versions to database.
- Added support for screensavers.
- Added a link to the new site in the aboutbox.
- Bug fixed: when canceling Fileselect, program would hang
- Some minor cosmetic fixes.
UPX Graphical 1.38a
Graphical GUI incl UPX 3.02. Support Drag and Drop and context-menu. With many further information. UPX and the scrambler are integrated. But the best is this program is 160kb great. NO external progr more>>
Graphical GUI incl UPX 3.02. Support Drag and Drop and context-menu. With many further information. UPX and the scrambler are integrated. But the best is this program is 160kb great. NO external program required.
Whats new in this version: UPX 3.03 added
<<less
Dirk Paehl - A Graphical UPX utility. UPX Graphical. Graphical GUI incl UPX 3.02 and a scrambler. Support Drag & Drop and context-menu. WithUPXcmd 1.3.0.0
This is an open source GUI for excellent executable packer, UPX. more>> This is an open source GUI for excellent executable packer, UPX.
UPXcmd is a freeware GUI (Graphical User Interface) for excellent executable packer, UPX (Ultimate Packer for eXecutables, upx.sf.net).
UPXcmd package contains a new program, UPXcmd DropBox. Dropbox allows you to compress your files by dragging them to an always on top window. DropBox uses UPXcmd main programs settings for processing.
Overall, UPXcmd is an excellent open source packer.
Main features:
- Easy and fully functional GUI for UPX
- Compress or decompress more than one files with one click
- Ability to choose filetypes to compress
- Compress your files without replacing, no data loss!
- Dragn Drop compressing or decompressing with new UPXcmd DropBox
- Shutdown Windows after process completed option
Enhancements:
- NEW!: UPXcmd DropBox application added
- NEW!: Window transparency checkbox fade in/out effect
- NEW!: UPXcmd now saves default compression level setting
- FIX: Minor GUI view fixes
- CHG: No need to GDI DLL anymore
- CHG: UPXcmd does not delete data resources on exit anymore
- CHG: Some code optimizations