zipfli

Create optimized ZIP archives using Zopfli compression.

zipfli produces smaller ZIP files by using Zopfli's deflate implementation, which achieves better compression ratios than standard deflate at the cost of longer compression times. It includes format presets for EPUB, ODF, and OOXML that automatically handle which files must be stored uncompressed per each format's spec.

Installation

cargo install zipfli

Or build from source:

git clone https://github.com/pathawks/zipfli.git
cd zipfli
cargo install --path .

Usage

zipfli output.zip file1.txt file2.txt

Write to stdout:

zipfli - file1.txt file2.txt > output.zip

Use a format preset:

zipfli --format epub book.epub mimetype META-INF/container.xml content.opf chapter1.xhtml

Format Presets

Preset	Stored (uncompressed) files
epub	mimetype, META-INF/manifest.xml, META-INF/container.xml
odf	mimetype, META-INF/manifest.xml
ooxml	[Content_Types].xml, _rels/.rels

EPUB and ODF presets also sort mimetype to appear first in the archive, as required by their specifications.

If a compressed file ends up larger than the original, it is automatically stored uncompressed instead.

Options

Option	Description
-f, --format <FORMAT>	Archive format preset (epub, odf, ooxml)
-i, --iterations-without-improvement <N>	Zopfli iterations without improvement (default: 15)
-q, --quiet	Suppress progress output
-h, --help	Print help
-V, --version	Print version

License

Licensed under either of Apache License, Version 2.0 or MIT License at your option.