PECompact is a next generation Windows executable compressor designed for software developers and vendors. Commonly termed an 'executable packer', such utilities compress executables and modules (i.e. *.EXE, *.DLL, *.OCX, *.SCR). At runtime the compressed modules are rapidly decompressed in memory.

Executable compressors work by compressing selected portions of executables. At runtime, compressed executables are decompressed and reconstructed directly into their virtual image (memory) so that no data is ever written to the disk. The executable can therefore be run exactly as it was before without the user even knowing it was compressed.

PECompact has been built to be very extensible. Using advanced plug-ins by, PECompact is able to be enhanced and extended by third parties.

PECompact includes plug-ins to perform CRC checks, password based encryption, message box prompt for permission to execute, and much-much more. And since these plugins can all be combined in any order and quantity, each compressed file can be very unique.

For absolute uniqueness, the loader itself (decompression stub) is also a plug-in type and so can be changed or extended.