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Free UPX 2.3

A GUI for the "ultimate EXE packer"

by Mike Williams

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Based on 0 ratings
License: Freeware
Operating Systems: Windows 10, Windows 7 (32 bit), Windows 7 (64 bit), Windows 8, Windows Server, Windows Vista (32 bit), Windows Vista (64 bit), Windows XP
Languages: English
Software Cost: Free
Date Updated: 19 February 2017
Watchlist: Add download to my watchlist
Downloads To Date: 525
Developer: Jacek Pazera
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Free UPX
A GUI for the "ultimate EXE packer"

Free UPX is a graphical interface for UPX, the "ultimate executable packer", and can help you compress or decompress various executable file types (EXE, DLL, OCX, CPL etc).

The package will often compress executables by more than standard archiving software, and the results are transparent. Compress an EXE, it keeps the same extension as before, and decompresses itself every time it's launched with no sign it was ever packed.

UPX is aimed at developers who need to reduce the size of their distribution (NirSoft uses it to keep file sizes low, for example). But you could use it to shrink your favourite applications, maybe to squeeze more onto a USB key.

You could also use Free UPX to decompress packed executables. That's handy if you're trying to analyze an EXE with something like PeStudio to find out what it does.

Whatever you're doing, Free UPX is simple to operate. Drag and drop some EXEs to see information about them, check if any are packed already, then compress or decompress them in a couple of clicks.

Beware, though: by default Free UPX rewrites the original file with its packed/ unpacked version. To change this, enter a custom output file name, or just work with a copy of the source file.

That's not all. Packing the wrong files may cause problems with some applications, if it doesn't break them entirely, so be sure to test your exe's carefully.

Version 2.3:

Added support for the latest version of the UPX: 3.93.


Free UPX is simple and straightforward packer/ unpacker which supports many different file types (Windows, Elf, Mac OS). It's not aimed at the average home user, though, so if you don't really know what you're doing, be sure to work with copies of the source files.

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Spotlight: Free Full Software

WhatsApp Messenger 2.17.31

Free Full Commercial Software

WhatsApp Messenger is the world's most popular instant messaging app for smartphones.

You can use it to send and receive text and voice messages, photos, videos, even call your friends in other countries, and because it uses your phone's internet connection it might not cost you anything at all (depending on whether you'll pay data charges).

It's easy to set up and use. There's no need to create and remember new account names or pins because it works with your phone number, and uses your regular address book to find and connect you with friends who use WhatsApp already.

You can talk one-to-one or in group chats, and because you're always logged in there's no way to miss messages. Even if your phone is turned off, WhatsApp will save your messages and display them as soon as you're back online.

There's plenty more (location sharing, contact exchange, message broadcasting) and the app is free for a year, currently $0.99/ year afterwards.

What's New in Version 2.17.31

• Add color filters to your media. Just capture or select a photo, video, or GIF, and swipe up to pick a filter.
• When you receive multiple photos from the same sender in a row, they'll now be grouped together as an album.
• New reply shortcut: simply swipe right in any message to quickly reply to it.