---
name: "jbig2dec"
section: "1"
platform: "linux"
package: "jbig2dec"
version: "0.20-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/jbig2dec"
---

# jbig2dec(1)

File format converter specialized in JBIG2 decoding

## NAME

jbig2dec - File format converter specialized in JBIG2 decoding

## SYNOPSIS

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

## DESCRIPTION

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.

## OPTIONS

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.

## REPORTING BUGS

Report bugs at https://bugs.ghostscript.com

Contact the developers on Discord: https://discord.gg/taPnFQp5gb or via the mailing list \<gs-devel@ghostscript.com\>.

## AUTHOR

This manpage was initially written by Sebastian Rasmussen \<sebras@gmail.com\> for jbig2dec and the Debian Project.