UPX Download (Latest 2024) - FileCR

Free download UPX 4.2.4 Latest full version - The Ultimate Packer for eXecutables.


Free Download UPX for Windows PC. It is a free, secure, portable, extendable, high-performance executable packer for several executable formats.

Overview of UPX

It is not just your average file compressor. It's a powerful tool designed to significantly reduce the size of programs and Dynamic Link Libraries (DLLs) by an impressive 50%-70%. This reduction in size translates to various advantages, such as faster network load times, quicker downloads, and reduced storage costs.

One of its remarkable strengths is its ability to achieve exceptional compression ratios. Compared to traditional Zip compression, it offers superior results, making it an invaluable tool for optimizing distribution sizes. Moreover, it ensures rapid decompression, with speeds exceeding 500 MB/sec on modern machines.

Security and Verification

Its open-source nature allows Security and Antivirus software to analyze compressed apps, ensuring their integrity and security.

Incredible Compression Ratio

Its compression surpasses Zip's, enabling you to shrink your distribution sizes effectively.

Swift Decompression

Its in-place decompression ensures that your compressed executables are quickly unpacked without any memory overhead.

Checksum Maintenance

It maintains internal checksums for compressed and uncompressed files, ensuring data integrity.

Universal Compatibility

It supports various executable formats, including Windows programs, DLLs, macOS apps, and Linux executables.


Crafted in portable endian-neutral C++, it guarantees compatibility across different systems.


Its modular design facilitates the easy incorporation of new executable formats and compression algorithms.

Free and Open Source

Distributed under the GNU General Public License v2+, it comes with full source code, granting you the freedom to use, modify, and distribute it.

System Requirements

  • Windows 7 or later


UPX is more than just a file compressor; it's a tool that empowers developers and users alike. Its exceptional compression ratios, lightning-fast decompression, and cross-platform support ensure your software distribution becomes smoother, faster, and more cost-effective.


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