.Q File Extension

Quantum Compressed File

Developer Cinematronics
3.8  |  6 Votes

What is a Q file?

A Q file is a compressed archive created using Quantum compression. It contains one or more compressed files. Q files may also be referred to as Quantum archives.

More Information

Quantum is a compression format created by Cinematronics' David Stafford. It uses an extended LZ77 compression algorithm to compress users' files. Most notably, Quantum is the compression method used to create some Windows .CAB (Windows Cabinet) files.

Most other Quantum archives are saved as Q files. Q files can be created using a variety of compression programs. For example, PAQ.exe was a Quantum compression program available for MS-DOS, and QWIN.exe was a Quantum compression program available for 16-bit Windows. COMPRESS.exe, a program bundled with Windows versions up to Windows XP, could also create Quantum archives.

How to open a Q file

Because Quantum compression is an old, rarely-used compression format, no current programs can decompress Q archives. If you have access to a program that can create Q archives, you may be able to use that program to decompress a Q archive.

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Programs that open Q files

No programs available

Verified by FileInfo.com

The FileInfo.com team has independently researched the Quantum Compressed file format and apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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