UPX

File Format
Name	UPX
Ontology	Electronic File Formats Compression Executable compression UPX

For another "UPX" format, see UPX/TPX (Photo Express).

UPX (Ultimate Packer for eXecutables) is a popular executable compression application.

UPX supports several different executable formats, including Microsoft Windows and MS-DOS. UPX-compressed executables can often be identified as such, for example by the file command.

UPX traditionally uses a data compression algorithm named UCL, though other algorithms may also be available.

Sample files

• dexvert samples — archive/upxPacked

Links

• UPX website
• Wikipedia: UPX