macOS
Homebrewverified · 100%
brew install jbig2enclocal Homebrew formula metadata
MacPortsverified · 94%
sudo port install jbig2encMacPorts ports tree · graphics/jbig2enc/Portfile · source: api.github.com
brew
Install jbig2enc with Homebrew, apk, apt, MacPorts, Nix
JBIG2 encoder (for monochrome documents). Version 0.32 via Homebrew; verified 2026-06-19.
install
Additional install commands
Linux
Alpine Linux apkverified · 92%
sudo apk add jbig2encAlpine Linux edge package indexes · jbig2enc · source: dl-cdn.alpinelinux.org
Debian aptverified · 92%
sudo apt install jbig2Debian stable package indexes · jbig2 · source: deb.debian.org
Nixverified · 92%
nix profile install nixpkgs#jbig2encnixpkgs package indexes · pkgs/by-name/jb/jbig2enc/package.nix · source: api.github.com
overview
Package summary
JBIG2 encoder (for monochrome documents)
Project links
Commands and aliases
- jbig2
- jbig2topdf.py
history
Project history and usage
jbig2enc is a command-line JBIG2 encoder for monochrome document images. Its README describes JBIG2 as a bi-level image format that can outperform Group 4 fax compression and says the tool can generate JBIG2 streams, fragments for embedding in PDFs, symbol extraction and classification, refinement coding, and multipage document compression.
Project history
The public GitHub repository was created in 2009, and the bundled ChangeLog records releases as early as the 0.21-era work on PDF output and old-book scans. The project grew around Leptonica integration, with repeated releases updating Leptonica compatibility, Windows build support, autotools, CMake, Meson, and the helper script later named jbig2topdf.py.
Adoption history
Homebrew packages the executable as jbig2enc, while Debian and Ubuntu expose the related command through a jbig2 package name. OCRmyPDF documentation treats a JBIG2 encoder as an optional but recommended component for smaller OCR-produced PDFs, which is one of the main reasons the encoder matters in Unix packaging even though the upstream project is small.
How it is used
Typical usage is document-pipeline work: encode scanned bilevel images with jbig2, then use jbig2topdf.py to wrap the JBIG2 output into a PDF. The README also documents standalone .jb2 output and sample commands for multi-image PDF creation.
Why package nerds care
jbig2enc sits at an awkward packaging boundary: it is a tiny specialist encoder, but it unlocks much smaller scanned-document PDFs for tools higher in the stack. Packagers also care about its history because JBIG2 patent concerns long affected distribution decisions, while later releases focused on build-system portability and memory-safety fixes.
Timeline
- 2009: Public GitHub repository created and version 0.27 recorded with Leptonica 1.58 support.
- 2012: Version 0.28 added autotools support, a Visual C++ solution, version reporting, and PDF DPI fixes.
- 2017: Version 0.29 fixed builds with Leptonica 1.70 and adjusted reference counting.
- 2024: Version 0.30 moved PDF helper support to Python 3, added CMake, standalone .jb2 support, DPI options, and ARM endian fixes.
- 2026: Versions 0.31 and 0.32 added build-system work, CI improvements, argument checks, C++17 requirements, and memory-leak fixes.
Related projects
- The README names Leptonica as a required imaging library and links related jbig2enc sample and minidjvu projects. In package-manager use it is often encountered through OCRmyPDF and other scanned-document workflows.
Sources
security posture
Risk level: green
narrow executable package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- narrow executable package without higher-risk signals
Signals
- metadata:no-higher-risk-signals
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 6 platform targets.
- Installs with 6 runtime dependencies.
- Build metadata lists 4 build dependencies.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
jbig2 | cli | global executable | |
jbig2topdf.py | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-07-08
manager version0.32
manager updated2026-06-19
local dataok
upstreamcurrent
latest detected0.32
https://github.com/agl/jbig2enc
- okNo freshness warnings were generated.
install metadata
Package metadata
| Package key | brew:jbig2enc |
|---|---|
| Version | 0.32 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/jbig2enc |
| Homepage | https://github.com/agl/jbig2enc |
| Repository | https://github.com/agl/jbig2enc |
| Upstream docs | https://github.com/agl/jbig2enc/blob/master/README.md |
| License | Apache-2.0 |
| Source archive | https://github.com/agl/jbig2enc/archive/refs/tags/0.32.tar.gz |
| Last updated | 2026-06-19T22:36:09Z |
| Pulse | updated |
| Dependencies | giflib, jpeg-turbo, leptonica, libpng, libtiff, webp |
| Build dependencies | autoconf, automake, libtool, pkgconf |
| Bottle | available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | jbig2enc |
| Version Scheme | 0 |
| Revision | 0 |
| Head Version | HEAD |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
Debian apt95%
jbig2 0.30-1
encoder for JBIG2 - command-line tool
https://github.com/agl/jbig2enc
sudo apt install jbig2- Section: utils
- Architecture: amd64
- Source Package: jbig2enc
- 3 dependencies
- normalized package name match
- Matched by: Jbig2enc
Debian apt95%
libjbig2enc-dev 0.30-1
encoder for JBIG2 - development headers
https://github.com/agl/jbig2enc
sudo apt install libjbig2enc-dev- Section: libdevel
- Architecture: amd64
- Source Package: jbig2enc
- 2 dependencies
- normalized package name match
- Matched by: Jbig2enc
Debian apt95%
libjbig2enc0t64 0.30-1
encoder for JBIG2 - libraries
https://github.com/agl/jbig2enc
sudo apt install libjbig2enc0t64- Section: libs
- Architecture: amd64
- Source Package: jbig2enc
- 6 dependencies
- 1 provides
- 1 optional deps
- normalized package name match
- Matched by: Jbig2enc
Nix95%
jbig2enc
nix profile install nixpkgs#jbig2enc- normalized package name match
- Matched by: Jbig2enc
Ubuntu apt95%
jbig2 0.29-2.1build1
encoder for JBIG2 - command-line tool
https://github.com/agl/jbig2enc
sudo apt install jbig2- Section: universe/utils
- Architecture: amd64
- Source Package: jbig2enc
- 3 dependencies
- normalized package name match
- Matched by: Jbig2enc
Ubuntu apt95%
libjbig2enc-dev 0.29-2.1build1
encoder for JBIG2 - development headers
https://github.com/agl/jbig2enc
sudo apt install libjbig2enc-dev- Section: universe/libdevel
- Architecture: amd64
- Source Package: jbig2enc
- 2 dependencies
- normalized package name match
- Matched by: Jbig2enc
Ubuntu apt95%
libjbig2enc0t64 0.29-2.1build1
encoder for JBIG2 - libraries
https://github.com/agl/jbig2enc
sudo apt install libjbig2enc0t64- Section: universe/libs
- Architecture: amd64
- Source Package: jbig2enc
- 6 dependencies
- 1 provides
- 1 optional deps
- normalized package name match
- Matched by: Jbig2enc
apk95%
jbig2enc 0.30-r0
JBIG2 Encoder
https://github.com/agl/jbig2enc
sudo apk add jbig2enc- License: Apache-2.0
- Architecture: x86_64
- Source Package: jbig2enc
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Jbig2enc
apk95%
jbig2enc-dev 0.30-r0
JBIG2 Encoder (development files)
https://github.com/agl/jbig2enc
sudo apk add jbig2enc-dev- License: Apache-2.0
- Architecture: x86_64
- Source Package: jbig2enc
- 1 dependencies
- normalized package name match
- Matched by: Jbig2enc
apk95%
jbig2enc-doc 0.30-r0
JBIG2 Encoder (documentation)
https://github.com/agl/jbig2enc
sudo apk add jbig2enc-doc- License: Apache-2.0
- Architecture: x86_64
- Source Package: jbig2enc
- normalized package name match
- Matched by: Jbig2enc
apk95%
jbig2enc-static 0.30-r0
JBIG2 Encoder (static library)
https://github.com/agl/jbig2enc
sudo apk add jbig2enc-static- License: Apache-2.0
- Architecture: x86_64
- Source Package: jbig2enc
- normalized package name match
- Matched by: Jbig2enc
MacPorts95%
jbig2enc
sudo port install jbig2enc- normalized package name match
- Matched by: Jbig2enc
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- Nucleus package database
- av.db category and tag curation
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- package relationship graph
- package version freshness
- package-page enrichment