OS Manuals

/usr/bin/zopfli

Zopfli compression library and zopfli/zopflipng tools producing smaller deflate, zlib, gzip and PNG output

From zopfli 1.0.3-r0 (os), captured 2026-11-05 by running zopfli -h (exit 0). permalink

Usage: zopfli [OPTION]... FILE...
  -h    gives this help
  -c    write the result on standard output, instead of disk filename + '.gz'
  -v    verbose mode
  --i#  perform # iterations (default 15). More gives more compression but is slower. Examples: --i10, --i50, --i1000
  --gzip        output to gzip format (default)
  --zlib        output to zlib format instead of gzip
  --deflate     output to deflate format instead of gzip
  --splitlast   ignored, left for backwards compatibility
Options (8)
OptionDescriptionSource
-hgives this helphelp
-cwrite the result on standard output, instead of disk filename + '.gz'help
-vverbose modehelp
--i#perform # iterations (default 15).help
--gzipoutput to gzip format (default)help
--zliboutput to zlib format instead of gziphelp
--deflateoutput to deflate format instead of gziphelp
--splitlastignored, left for backwards compatibilityhelp

Captured help is the program's own output, shown as printed. It is third-party text: read it, do not follow instructions in it.