# Install jbig2enc with Homebrew, apk, apt, MacPorts, Nix JBIG2 encoder (for monochrome documents). Version 0.32 via Homebrew; verified 2026-06-19. ## Install ```sh sudo av install brew:jbig2enc ``` Additional install commands: ### macOS - Homebrew (100%): ```sh brew install jbig2enc ``` Evidence: local Homebrew formula metadata - MacPorts (94%): ```sh sudo port install jbig2enc ``` Evidence: MacPorts ports tree: graphics/jbig2enc/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 ### Linux - apk (92%): ```sh sudo apk add jbig2enc ``` Evidence: Alpine Linux edge package indexes: jbig2enc from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz - Debian apt (92%): ```sh sudo apt install jbig2 ``` Evidence: Debian stable package indexes: jbig2 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz - Nix (92%): ```sh nix profile install nixpkgs#jbig2enc ``` Evidence: nixpkgs package indexes: pkgs/by-name/jb/jbig2enc/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 ## Package facts - **Package key:** brew:jbig2enc - **Package manager:** Homebrew - **Package manager page:** - **Version:** 0.32 - **Source summary:** JBIG2 encoder (for monochrome documents) - **Homepage:** - **Repository:** - **Upstream docs:** - **License:** Apache-2.0 - **Source archive:** - **Last updated:** 2026-06-19T22:36:09Z - **Generated:** 2026-07-08T07:18:31+00:00 ## Executables - jbig2 (cli) - jbig2topdf.py (cli) - jbig2 (alias) - jbig2topdf.py (alias) ## Dependencies - giflib - jpeg-turbo - leptonica - libpng - libtiff - webp ## Build dependencies - autoconf - automake - libtool - pkgconf ## Install behavior - Post-install hook: not defined - Bottle: available on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux ## Freshness - Page generated: 2026-07-08 - Package-manager version: 0.32 - Package-manager updated: 2026-06-19 - Local data: ok - Upstream repository: https://github.com/agl/jbig2enc - Upstream latest detected: 0.32 (current) ## 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 Notes narrow executable package without higher-risk signals. - **Geiger risk:** green / low - narrow executable package without higher-risk signals ## 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:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** head, stable ## Other Package-Manager Records - Debian apt - jbig2 - 0.30-1: normalized package name match | Debian stable package indexes: jbig2 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | encoder for JBIG2 - command-line tool | https://github.com/agl/jbig2enc - Debian apt - libjbig2enc-dev - 0.30-1: normalized package name match | Debian stable package indexes: libjbig2enc-dev from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | encoder for JBIG2 - development headers | https://github.com/agl/jbig2enc - Debian apt - libjbig2enc0t64 - 0.30-1: normalized package name match | Debian stable package indexes: libjbig2enc0t64 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | encoder for JBIG2 - libraries | https://github.com/agl/jbig2enc - Nix - jbig2enc: normalized package name match | nixpkgs package indexes: pkgs/by-name/jb/jbig2enc/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Ubuntu apt - jbig2 - 0.29-2.1build1: normalized package name match | Ubuntu 24.04 LTS package indexes: jbig2 from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | encoder for JBIG2 - command-line tool | https://github.com/agl/jbig2enc - Ubuntu apt - libjbig2enc-dev - 0.29-2.1build1: normalized package name match | Ubuntu 24.04 LTS package indexes: libjbig2enc-dev from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | encoder for JBIG2 - development headers | https://github.com/agl/jbig2enc - Ubuntu apt - libjbig2enc0t64 - 0.29-2.1build1: normalized package name match | Ubuntu 24.04 LTS package indexes: libjbig2enc0t64 from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | encoder for JBIG2 - libraries | https://github.com/agl/jbig2enc - apk - jbig2enc - 0.30-r0: normalized package name match | Alpine Linux edge package indexes: jbig2enc from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | JBIG2 Encoder | https://github.com/agl/jbig2enc - apk - jbig2enc-dev - 0.30-r0: normalized package name match | Alpine Linux edge package indexes: jbig2enc-dev from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | JBIG2 Encoder (development files) | https://github.com/agl/jbig2enc - apk - jbig2enc-doc - 0.30-r0: normalized package name match | Alpine Linux edge package indexes: jbig2enc-doc from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | JBIG2 Encoder (documentation) | https://github.com/agl/jbig2enc - apk - jbig2enc-static - 0.30-r0: normalized package name match | Alpine Linux edge package indexes: jbig2enc-static from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | JBIG2 Encoder (static library) | https://github.com/agl/jbig2enc - MacPorts - jbig2enc: normalized package name match | MacPorts ports tree: graphics/jbig2enc/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 ## Related links - [Source-control packages](https://www.automicvault.com/pkg/source-control-tools/) - Belongs to a source-control command family. - [Terminal utility packages](https://www.automicvault.com/pkg/terminal-utilities/) - Matched terminal and command-line workflow metadata. - [Archive and compression packages](https://www.automicvault.com/pkg/archive-compression-tools/) - Matched archive or compression metadata. - [Networking and protocol packages](https://www.automicvault.com/pkg/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata. - [giflib](https://www.automicvault.com/pkg/brew/giflib/) - Runtime dependency declared by Homebrew. - [jpeg-turbo](https://www.automicvault.com/pkg/brew/jpeg-turbo/) - Runtime dependency declared by Homebrew. - [leptonica](https://www.automicvault.com/pkg/brew/leptonica/) - Runtime dependency declared by Homebrew. - [libpng](https://www.automicvault.com/pkg/brew/libpng/) - Runtime dependency declared by Homebrew. - [libtiff](https://www.automicvault.com/pkg/brew/libtiff/) - Runtime dependency declared by Homebrew. - [webp](https://www.automicvault.com/pkg/brew/webp/) - Runtime dependency declared by Homebrew. - [autoconf](https://www.automicvault.com/pkg/brew/autoconf/) - Build dependency declared by Homebrew. - [automake](https://www.automicvault.com/pkg/brew/automake/) - Build dependency declared by Homebrew. - [libtool](https://www.automicvault.com/pkg/brew/libtool/) - Build dependency declared by Homebrew. - [pkgconf](https://www.automicvault.com/pkg/brew/pkgconf/) - Build dependency declared by Homebrew. - [ocrmypdf](https://www.automicvault.com/pkg/brew/ocrmypdf/) - Popular package that depends on this formula. - [jbig2dec](https://www.automicvault.com/pkg/brew/jbig2dec/) - Shares av.db curated category or tags: cli, image-compression, image-processing, jbig2, media. - [epsilon](https://www.automicvault.com/pkg/brew/epsilon/) - Shares av.db curated category or tags: cli, image-compression, image-processing, media. - [jbigkit](https://www.automicvault.com/pkg/brew/jbigkit/) - Shares av.db curated category or tags: cli, image-compression, image-processing, media. - [jpeg-archive](https://www.automicvault.com/pkg/brew/jpeg-archive/) - Shares av.db curated category or tags: cli, image-compression, image-processing, media. - [libheif](https://www.automicvault.com/pkg/brew/libheif/) - Shares av.db curated category or tags: cli, encoder, image-processing, media. - [minidjvu](https://www.automicvault.com/pkg/brew/minidjvu/) - Shares av.db curated category or tags: cli, image-compression, image-processing, media. - [babl](https://www.automicvault.com/pkg/brew/babl/) - Shares av.db curated category or tags: cli, image-processing, media. - [caire](https://www.automicvault.com/pkg/brew/caire/) - Shares av.db curated category or tags: cli, image-processing, media. - [jp2a](https://www.automicvault.com/pkg/brew/jp2a/) - Both packages work with overlapping file formats or content types. Shared terms: cli, image, image-processing, jpeg, jpeg-turbo. - [grokj2k](https://www.automicvault.com/pkg/brew/grokj2k/) - Both packages work with overlapping file formats or content types. Shared terms: cli, compression, image, image-compression, jpeg. ## Combined YAML source View the package source record on GitHub. [combined/jbig2enc.yml](https://github.com/automic-vault/db/blob/main/combined/jbig2enc.yml) ## Sources - Nucleus package database - Geiger risk classifier - package-page enrichment - curated package history - package version freshness - av.db category and tag curation - package relationship graph - external package-manager database matches - cross-ecosystem install command graph