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MPRESS
What it is
MPRESS is a free executable packer for compressing programs and libraries on Windows and macOS. It supports PE32, PE32+, .NET, and MAC-DARWIN formats, using the LZMAT compression library with optional LZMA compression. It 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 this method adds no memory overhead or other drawbacks. It also states that compressed programs run without runtime performance penalties and may start faster from slow removable media or a network. Its compatibility list names Windows 9x, NT, 2000, XP, 2003, Vista, 2008, and Windows 8, alongside Mac OS 10.3 and 10.4 and specified mac-darwin variants. The listed plan is free.
For and against
For
- Free of charge.
- Supports PE32, PE32+, .NET, and MAC-DARWIN formats.
- Offers optional LZMA compression.
- Command-line interface works with batch or make files.
Against
- Compatibility list names Windows only through Windows 8.
- macOS compatibility names Mac OS 10.3 and 10.4.
- The listed .NET Framework targets stop at version 4.0.
The verdict
MPRESS combines executable compression with options for stripping program information and command-line workflows. Check its listed format and operating-system compatibility against your target environment.
Who it suits
MPRESS may suit developers working with supported executable formats who want a free packer with command-line use. Its listed compatibility details are especially relevant when checking older Windows or macOS targets.
Plans and prices
MPRESS
Free of charge · PE32/PE32+/.NET/MAC-DARWIN executable formats
Read 30 Sep 2026 · github.com
On the record
- Command line
- Its command-line interface can be used from batch files or make files.github.com · read 30 Sep 2026
- Compression
- MPRESS uses the LZMAT compression library and offers optional LZMA compression.github.com · read 30 Sep 2026
- Decompression
- The README describes in-place decompression and says MPRESS has no memory overhead or other drawbacks from that technique.github.com · read 30 Sep 2026
- Executable contents
- MPRESS compresses program code, data, and resources, and can strip relocation, debug information, exceptions, and other information.github.com · read 30 Sep 2026
- 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.github.com · read 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.github.com · read 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.github.com · read 30 Sep 2026
- Protection claim
- The README says MPRESS protects programs against reverse engineering by non-professional hackers.github.com · read 30 Sep 2026
- Purpose
- MPRESS is an executable packer that compresses programs and libraries.github.com · read 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.github.com · read 30 Sep 2026
- Supported formats
- It supports PE32, PE32+, .NET, and MAC-DARWIN executable formats.github.com · read 30 Sep 2026
- Windows compatibility
- The README lists compatibility with Windows 9x, NT, 2000, XP, 2003, Vista, 2008, and Windows 8.github.com · read 30 Sep 2026
