IGZIP(1)                         User Commands                        IGZIP(1)

NAME
       igzip - compress or decompress files similar to gzip

SYNOPSIS
       igzip [options] [infiles]

DESCRIPTION
       Compress or decompress files similar to gzip using the ISA-L fast
       deflate library.

       Output .gz files are compatible with gzip and [RFC-1952].

       Options are similar to gzip except --keep is default.

OPTIONS
       -h, --help
              help, print this message

       -#     use compression level # with 0 <= # <= 3

       -o     <file>           output file

       -c, --stdout
              write to stdout

       -d, --decompress
              decompress file

       -z, --compress
              compress file (default)

       -f, --force
              overwrite output without prompting

       --rm   remove source files after successful (de)compression

       -k, --keep
              keep source files (default)

       -S, --suffix <.suf>
              suffix to use while (de)compressing

       -V, --version
              show version number

       -v, --verbose
              verbose mode

       -N, --name
              save/use file name and timestamp in compress/decompress

       -n, --no-name
              do not save/use file name and timestamp in compress/decompress

       -t, --test
              test compressed file integrity

       -T, --threads <n>
              use n threads to compress if enabled

       -q, --quiet
              suppress warnings

       with no infile, or when infile is - , read standard input

EXAMPLES
       Make compressed file1.gz and file2.gz and keep file1 and file2.
              igzip file1 file2

       Piped compression and decompression.
              igzip -c file.txt | igzip -d -c -

       Streaming compression from output of tar, compress level 2.
              tar cf - dir1 | igzip -2 > dir1.tar.gz

REPORTING BUGS
       Report bugs to https://github.com/intel/isa-l/issues

igzip command line interface 2.32.0
                                  March 2026                          IGZIP(1)