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MPRESS

MPRESS is a free executable packer for compressing programs and libraries on Windows and macOS.

Place
#16 of 28
Score
5.9

What MPRESS is

MPRESS is a free executable packer for compressing programs and libraries on Windows and macOS. It supports PE32, PE32+, .NET and MAC-DARWIN executable formats, using the LZMAT compression library with optional LZMA compression. MPRESS can compress code, data and resources, and strip relocation, debug, exception and other information. For .NET executables, it supports Framework targets 1.1, 2.0, 3.0 and 4.0 without requiring the .NET Framework to be installed. A command-line interface can be used from batch files or make files. The README describes in-place decompression and says it adds no memory overhead or other drawbacks; it also says compressed programs run without runtime performance penalties and may start faster from slow removable media or a network. Its compatibility list includes Windows 9x, NT, 2000, XP, 2003, Vista, 2008 and Windows 8, as well as named mac-darwin architectures and Mac OS 10.3 and 10.4. The listed plan is free.

Good

  • Supports PE32, PE32+, .NET and MAC-DARWIN formats.
  • Optional LZMA compression is available.
  • Command line can be used in batch or make files.
  • .NET targets do not require the framework installed.

Watch out

  • Listed Windows compatibility ends at Windows 8.
  • Named Mac OS compatibility is 10.3 and 10.4.
  • Supported formats are limited to those listed.

Who it suits

MPRESS suits developers who need to pack supported Windows or macOS executables, including .NET targets, and can use a command-line tool. Its stated compatibility list is relevant for users working with those older Windows and Mac OS versions.

Verdict

MPRESS offers executable compression and stripping options for several listed formats, with a command-line interface. Check its compatibility list against the operating system and executable types you need to handle.

Plans and prices

From MPRESS's own pricing page, checked 30 Sep 2026.

All about pricing
PlanPriceWhat it gives you
MPRESSFreeFree of charge · PE32/PE32+/.NET/MAC-DARWIN executable formats

The facts

Each one read from MPRESS's own pages, with the date it was checked.

What it does

Command line
Its command-line interface can be used from batch files or make files.checked 30 Sep 2026
Compression
MPRESS uses the LZMAT compression library and offers optional LZMA compression.checked 30 Sep 2026
Decompression
The README describes in-place decompression and says MPRESS has no memory overhead or other drawbacks from that technique.checked 30 Sep 2026
Executable contents
MPRESS compresses program code, data, and resources, and can strip relocation, debug information, exceptions, and other information.checked 30 Sep 2026
Maintainer context
The repository says it mirrors MPRESS source and files and describes the original site as unchanged since the early 2000s.checked 30 Sep 2026
.NET support
It supports .NET executables targeting Framework versions 1.1, 2.0, 3.0, and 4.0, and does not require the .NET Framework to be installed.checked 30 Sep 2026
Protection claim
The README says MPRESS protects programs against reverse engineering by non-professional hackers.checked 30 Sep 2026
Purpose
MPRESS is an executable packer that compresses programs and libraries.checked 30 Sep 2026
Runtime behavior
The README says compressed programs run as before without runtime performance penalties and may start faster from slow removable media or a network.checked 30 Sep 2026
Supported formats
It supports PE32, PE32+, .NET, and MAC-DARWIN executable formats.checked 30 Sep 2026

Where it runs

macOS compatibility
The README lists mac-darwin-i386, mac-darwin-x86_64, and mac-darwin-ub applications, and names Mac OS 10.3 and 10.4.checked 30 Sep 2026
Windows compatibility
The README lists compatibility with Windows 9x, NT, 2000, XP, 2003, Vista, 2008, and Windows 8.checked 30 Sep 2026

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