Looking for a powerful compression tool that can shrink files without sacrificing quality? Look no further than UPX. Developed by the UPX Team, this Windows 7 software packs a punch, delivering fast and efficient compression for a variety of file types. With UPX, you can reduce the size of your files and folders by up to 80%, saving valuable disk space and speeding up transfers. And the best part? UPX is completely free to download and use. Say goodbye to bloated files and say hello to UPX.

UPX achieves an excellent compression ratio and offers very fast decompression. Your executables suffer no memory overhead or other drawbacks for most of the formats supported, because of in-place decompression. UPX strengths in a nutshell:

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 it's 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 v2+, with special exceptions granting the free usage for commercial programs as stated in the UPX License Agreement.

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