Papa’s Best CFBF Optimizer

A command line tool to optimize and defragment Compound File Binary Format (CFBF) files.

CFBF is the underlying format for Windows setups (.MSI), Word documents (.DOC), PowerPoint presentations (.PPT), Excel sheets (.XLS), and many more. CFBF Optimizer removes needless sectors and abandoned data from the files and reduces fragmentation in the rest – much like the now-abandoned Document Press.

Runs on Windows 7 and later, and on Linux with Wine.

Download

CFBF Optimizer
source code (C++)
updated 1 November 2019 (changes)

Features

shrinks CFBF files by removing unused sectors from the internal file system
improves compressability via defragmentation of the contained data
supports version 3 (pre-2010) as well as version 4
keeps digital signatures intact
very fast

Usage

bestcfbf <infile> <outfile> [-v4]
returns zero on success

Benchmark

In comparison with Document Press, CFBF Optimizer reaches the same optimization level with small files (CFBF v3) and is superior with large files (CFBF v4). Sizes are in KiB:

	original	CFBF Optimizer	CFBF Optimizer (`-v4`)	Document Press 6.01
RSS Bandit setup	10 687.5	10 687	10 656	10 687
Word 2000 sample file	70	64	88	64
STL Viewer setup	76	55	72	55
`Movie Quiz.xls`	3 650.5	3 650	3 644	3 650

Something Missing?

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