FUPX 2.5

FUPX (Free UPX) by Jacek Pazera is a free, portable Windows front‑end for the UPX executable packer. It makes compressing and decompressing executables simple and safe by giving you a clear, point‑and‑click interface for UPX’s command‑line options. It’s ideal for developers, power users, and anyone who wants to reduce the size of EXE, DLL, and other supported binaries without digging into the terminal.

Key features:

• Easy GUI for packing and unpacking files supported by UPX (e.g., EXE, DLL, OCX, SYS, CPL)
• Batch processing with drag‑and‑drop
• Per‑file settings with access to common UPX options (compression levels, custom switches)
• Displays original vs. compressed size and compression ratio
• Optional backup of originals and quick restore
• Portable—no installation required; works with 32‑ and 64‑bit binaries
• Lets you select and use a specific UPX build if needed

Note: FUPX is a graphical wrapper; the actual compression is performed by UPX.

FUPX is developed by Jacek Pazera and is used by 1 user of Software Informer. The most popular versions of this product among our users are: 2.5, 3.0, 3.1 and 3.2. The name of the program executable file is fupx.exe.