# Install guetzli with Homebrew, apk, apt, MacPorts, Nix, pacman, scoop Perceptual JPEG encoder. Version 1.0.1 via Homebrew; verified 2026-07-14. Also installable with debian: sudo apt install guetzli. ## Install ```sh sudo av install brew:guetzli ``` Additional install commands: ### macOS - Homebrew (100%): ```sh brew install guetzli ``` Evidence: local Homebrew formula metadata - MacPorts (94%): ```sh sudo port install guetzli ``` Evidence: MacPorts ports tree: graphics/guetzli/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 ### Linux - apk (92%): ```sh sudo apk add guetzli ``` Evidence: Alpine Linux edge package indexes: guetzli from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz - Debian apt (92%): ```sh sudo apt install guetzli ``` Evidence: Debian stable package indexes: guetzli from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz - Nix (92%): ```sh nix profile install nixpkgs#guetzli ``` Evidence: nixpkgs package indexes: pkgs/by-name/gu/guetzli/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - pacman (92%): ```sh sudo pacman -S guetzli ``` Evidence: Arch Linux sync databases: guetzli from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz ### Windows - Scoop (92%): ```sh scoop install main/guetzli ``` Evidence: Scoop official bucket manifest trees: bucket/guetzli.json from https://api.github.com/repos/ScoopInstaller/Main/git/trees/master?recursive=1 ## Package facts - **Package key:** brew:guetzli - **Package manager:** Homebrew - **Version:** 1.0.1 - **Source summary:** Perceptual JPEG encoder - **Homepage:** - **Repository:** - **Last updated:** 2026-07-14T14:31:55+09:00 - **Generated:** 2026-08-03T19:37:03+00:00 ## Executables - guetzli (alias) ## Install behavior - Bottle: not available ## Freshness - Page generated: 2026-08-03 - Package-manager version: 1.0.1 ## Project history and usage Guetzli is Google's perceptual JPEG encoder for producing smaller sequential JPEG files at high visual quality. It belongs to the same family of format-compatible compression experiments as Zopfli: spend more CPU time during encoding while keeping output compatible with existing decoders. ### Project history Google announced Guetzli as open source on 2017-03-16. The announcement described it as a JPEG encoder for digital images and web graphics that targeted file-size reductions while remaining compatible with existing browsers, image-processing applications, and the JPEG standard. The repository README says Guetzli-generated images are typically 20-30 percent smaller than libjpeg images of equivalent quality, and that Guetzli emits sequential, non-progressive JPEGs. The implementation uses a psychovisual approach focused on quantization decisions, with Butteraugli-related perceptual modeling present in the repository. ### Adoption history Guetzli was quickly packaged because it offered an easy experiment for web image optimization: a single CLI that reads PNG or JPEG input and writes optimized JPEG output. The official README documents Homebrew and MacPorts installation paths, and the input metadata records packaging across Alpine, Homebrew, Debian, MacPorts, Nix, Arch, Scoop, and Ubuntu. Its adoption was bounded by cost. The README warns that it uses about 300 MB of memory per megapixel and roughly one minute of CPU per megapixel, making it better suited to offline asset pipelines than interactive image conversion. ### How it is used The CLI usage is direct: `guetzli [--quality Q] [--verbose] original.png output.jpg` or the same with JPEG input. The README recommends high-quality, preferably uncompressed input and notes that PNG alpha is flattened onto black because JPEG has no alpha channel. Guetzli assumes sRGB input with gamma 2.2 and ignores color-profile metadata. That assumption is important in package notes because it affects whether the tool is appropriate for a given image workflow. ### Why package nerds care Guetzli is a package-nerd favorite because it embodies a clear tradeoff: excellent density for legacy JPEGs, paid for with CPU and memory. It is a compact command-line artifact from a major research organization, easy to package, easy to benchmark, and easy to compare against libjpeg, MozJPEG, Zopfli, WebP, JPEG XL, and later Jpegli work. Google's later Jpegli announcement explicitly places newer JPEG work in relation to earlier Guetzli-style heuristics, making Guetzli part of the historical path from high-effort JPEG optimization toward faster modern JPEG-compatible encoders. ### Timeline - 2017-03-16: Google Open Source Blog announces Guetzli. - 2017-03-21: GitHub release metadata shows the release series around the public launch window. - 2017: README documents POSIX, Windows, macOS, Homebrew, MacPorts, and Bazel build paths. - 2024: Google's Jpegli announcement discusses faster heuristics developed after earlier Guetzli-style approaches. ### Related projects - Guetzli is related to libjpeg, MozJPEG, Butteraugli, Zopfli, WebP, JPEG XL, Brunsli, and Jpegli. Its distinguishing trait is staying inside the legacy JPEG format while using a slower perceptual search to improve compression density. ### Sources - - - - ## Security Notes narrow executable package without higher-risk signals. - **Geiger risk:** green / low - narrow executable package without higher-risk signals ## Other Package-Manager Records - Debian apt - guetzli - 1.0.1-2: normalized package name match | Debian stable package indexes: guetzli from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | perceptual JPEG encoder | https://github.com/google/guetzli - Nix - guetzli: normalized package name match | nixpkgs package indexes: pkgs/by-name/gu/guetzli/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Ubuntu apt - guetzli - 1.0.1-1build3: normalized package name match | Ubuntu 24.04 LTS package indexes: guetzli from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | perceptual JPEG encoder | https://github.com/google/guetzli - apk - guetzli - 0_git20191025-r3: normalized package name match | Alpine Linux edge package indexes: guetzli from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | Perceptual JPEG encoder that aims for excellent compression density at high visual quality | https://github.com/google/guetzli - apk - guetzli-dev - 0_git20191025-r3: normalized package name match | Alpine Linux edge package indexes: guetzli-dev from https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz | Perceptual JPEG encoder that aims for excellent compression density at high visual quality (development files) | https://github.com/google/guetzli - pacman - guetzli - 1.0.1-5: normalized package name match | Arch Linux sync databases: guetzli from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz | Perceptual JPEG encoder | https://github.com/google/guetzli - MacPorts - guetzli: normalized package name match | MacPorts ports tree: graphics/guetzli/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 - Scoop - main/guetzli: normalized package name match | Scoop official bucket manifest trees: bucket/guetzli.json from https://api.github.com/repos/ScoopInstaller/Main/git/trees/master?recursive=1 ## Combined YAML source View the package source record on GitHub. [combined/guetzli.yml](https://github.com/mxcl/pkgdb/blob/main/combined/guetzli.yml) ## Sources - pkg.so package database - Geiger risk classifier - curated package history - pkgdb category and tag curation - external package-manager database matches - cross-ecosystem install command graph