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jbig2dec(1) jbig2dec Manual jbig2dec(1)

jbig2dec - File format converter specialized in JBIG2 decoding

jbig2dec [options] file.jbig2
jbig2dec [options] global-stream page-stream

The jbig2dec command converts JBIG2 files to png or pbm files.

When passed a single file argument it is interpreted as a JBIG2 file stream, with either sequential or random-access organization.

When passed two stream arguments, they are interpreted as the global and page-specific portions of an embedded organization, as used in PDF. If a particular page references no global segment stream, /dev/null can be passed for the global-stream argument to request the embedded parser.

The options are as follows:
-e, --embedded
Expect embedded bit stream without file header.
-o file, --output file
Store the decoded output in file. Defaults to the input with a different extension. Set to - for standard output.
-t type, --format type
Force a particular output file format. Supported are png and pbm.
-d, --dump
Print the structure of the JBIG2 file rather than explicitly decoding it.
-m, --hash
Print a hash of the decoded document.
-q, --quiet
Suppress warnings and other diagnostic output.
-v, --verbose
Report additional information about the decoding process. Pass just -v for information about the file as it's being decoded. This is the same as --verbose=2. Pass --verbose=3 or higher for debugging information.
-V, --version
Show program version information.
-h, --help
Show usage summary.

Report bugs at

Contact the developers at the IRC channel #ghostscript at or via the mailing list <>.

This manpage was initially written by Sebastian Rasmussen <> for jbig2dec and the Debian Project.
2020 March 11 Version 0.19

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