# Install libpsl with Homebrew, apk, apt, dnf, MacPorts, Nix, pacman, zypper C library for the Public Suffix List. Version 0.22.0 via Homebrew; verified 2026-06-25. ## Install ```sh sudo av install brew:libpsl ``` Additional install commands: ### macOS - Homebrew (100%): ```sh brew install libpsl ``` Evidence: local Homebrew formula metadata - MacPorts (94%): ```sh sudo port install libpsl ``` Evidence: MacPorts ports tree: net/libpsl/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1 ### Linux - apk (92%): ```sh sudo apk add libpsl ``` Evidence: Alpine Linux edge package indexes: libpsl from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz - Debian apt (92%): ```sh sudo apt install libpsl-dev ``` Evidence: Debian stable package indexes: libpsl-dev from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz - dnf (92%): ```sh sudo dnf install libpsl ``` Evidence: Fedora Rawhide package metadata: libpsl from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst - Nix (92%): ```sh nix profile install nixpkgs#libpsl ``` Evidence: nixpkgs package indexes: pkgs/by-name/li/libpsl/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - pacman (92%): ```sh sudo pacman -S libpsl ``` Evidence: Arch Linux sync databases: libpsl from https://geo.mirror.pkgbuild.com/core/os/x86_64/core.db.tar.gz - zypper (92%): ```sh sudo zypper install libpsl-devel ``` Evidence: openSUSE Tumbleweed package metadata: libpsl-devel from https://download.opensuse.org/tumbleweed/repo/oss/repodata/be8d3611d25469107f32075a1697e69ec57a2b850b42348a658cc671ad5ec2b50760d02c3e59524d50da9a11d5be799bdaffba2e166e8ca8858512e3c0bd665d-primary.xml.zst ## Package facts - **Package key:** brew:libpsl - **Package manager:** Homebrew - **Package manager page:** - **Version:** 0.22.0 - **Source summary:** C library for the Public Suffix List - **Homepage:** - **Repository:** - **Upstream docs:** - **License:** MIT - **Source archive:** - **Last updated:** 2026-06-25T00:40:45Z - **Generated:** 2026-07-08T07:18:31+00:00 ## Executables - psl (cli) - psl-make-dafsa (cli) - psl (alias) - psl-make-dafsa (alias) ## Build dependencies - 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: 0.22.0 - Package-manager updated: 2026-06-25 - Local data: ok - Upstream repository: https://github.com/rockdaboot/libpsl - info: No cached GitHub release or tag data was available. ## Project history and usage libpsl is a C library for working with the Public Suffix List, the shared list used to decide where registrable domain boundaries sit. It gives native programs a fast way to answer questions that matter for cookies, certificates, domain display, and site grouping. ### Project history The library was created by Tim Ruehsen from libmget cookie code on 2014-03-19, according to the source changelog, and the public GitHub repository was created on 2014-03-20. The README describes libpsl as a C library that handles the Public Suffix List with built-in PSL data, file-loaded PSL data, DAFSA compression, thread safety, and IDNA support. The Public Suffix List itself is a cross-vendor initiative maintained by Mozilla volunteers and registry submissions. libpsl packages that ecosystem for C consumers rather than trying to define suffix policy itself. ### Adoption history libpsl's adoption comes from web-client and network-client needs: software must avoid supercookies, reject overbroad certificate or domain assumptions, and group sites by registrable domain. The Public Suffix List page names browsers, Qt, crawler libraries, certificate-authority workflows, and security tooling as users of PSL data. Package managers carry libpsl because many lower-level network tools need PSL behavior without embedding their own parser. Homebrew, Debian-family systems, Fedora, MacPorts, Nix, Arch, Alpine, and openSUSE all appear in the package metadata for this batch. ### How it is used Developers use libpsl through the C API to test whether a domain is a public suffix, verify cookie-domain acceptability, find public or private domain portions, or load updated PSL data. The package also ships the `psl` command and `psl-make-dafsa` for command-line inspection and compressed list generation. ### Why package nerds care libpsl is package-nerd significant because it is tiny infrastructure with security consequences. A stale or missing PSL layer can allow cookie scoping mistakes or bad domain-boundary assumptions, while a shared library lets distributions update the logic and data path centrally. Its build and packaging details are also unusually nerdy: the README separates libpsl releases from PSL data updates, supports both autotools and Meson, and uses DAFSA compression to shrink lookup data for fast native access. ### Timeline - 2014-03-19: Source changelog says Tim Ruehsen created the library from libmget cookie code. - 2014-03-20: The public GitHub repository was created. - 2016-01-02: Release 0.12.0 appears in GitHub release metadata. - 2019-04-16: Release 0.21.0 was published. - 2026-06-24: Release 0.22.0 included portability, build, Windows, Apple ICU, and tarball-build improvements. ### Related projects - The Public Suffix List, Mozilla's PSL maintenance process, Chromium's DAFSA code, GNU Wget/libmget history, curl-like clients, browsers, crawler libraries, and certificate-authority tooling are the related ecosystem. ### Sources - - - - - - - - ## Security Notes library-like package without higher-risk signals. - **Geiger risk:** green / low - library-like package without higher-risk signals ## Source Database Details - **Source Database:** Homebrew formula API - **Tap:** homebrew/core - **Full Name:** libpsl - **Version Scheme:** 0 - **Revision:** 0 - **Bottle Stable Root URL:** - **Deprecated:** no - **Disabled:** no - **Keg Only:** no - **URL Keys:** stable ## Other Package-Manager Records - Debian apt - libpsl-dev - 0.21.2-1.1+b1: normalized package name match | Debian stable package indexes: libpsl-dev from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Library for Public Suffix List (development headers) | https://github.com/rockdaboot/libpsl - Debian apt - libpsl5t64 - 0.21.2-1.1+b1: normalized package name match | Debian stable package indexes: libpsl5t64 from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Library for Public Suffix List (shared libraries) | https://github.com/rockdaboot/libpsl - Debian apt - psl - 0.21.2-1.1+b1: normalized package name match | Debian stable package indexes: psl from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Explore the Public Suffix List | https://github.com/rockdaboot/libpsl - Debian apt - psl-make-dafsa - 0.21.2-1.1: normalized package name match | Debian stable package indexes: psl-make-dafsa from https://deb.debian.org/debian/dists/stable/main/binary-amd64/Packages.xz | Create a binary DAFSA from a Public Suffix List | https://github.com/rockdaboot/libpsl - Nix - libpsl: normalized package name match | nixpkgs package indexes: pkgs/by-name/li/libpsl/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1 - Ubuntu apt - libpsl-dev - 0.21.2-1.1build1: normalized package name match | Ubuntu 24.04 LTS package indexes: libpsl-dev from https://archive.ubuntu.com/ubuntu/dists/noble/main/binary-amd64/Packages.gz | Library for Public Suffix List (development headers) | https://github.com/rockdaboot/libpsl - Ubuntu apt - libpsl5t64 - 0.21.2-1.1build1: normalized package name match | Ubuntu 24.04 LTS package indexes: libpsl5t64 from https://archive.ubuntu.com/ubuntu/dists/noble/main/binary-amd64/Packages.gz | Library for Public Suffix List (shared libraries) | https://github.com/rockdaboot/libpsl - Ubuntu apt - psl - 0.21.2-1.1build1: normalized package name match | Ubuntu 24.04 LTS package indexes: psl from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Explore the Public Suffix List | https://github.com/rockdaboot/libpsl - Ubuntu apt - psl-make-dafsa - 0.21.2-1.1build1: normalized package name match | Ubuntu 24.04 LTS package indexes: psl-make-dafsa from https://archive.ubuntu.com/ubuntu/dists/noble/universe/binary-amd64/Packages.gz | Create a binary DAFSA from a Public Suffix List | https://github.com/rockdaboot/libpsl - apk - libpsl - 0.21.5-r3: normalized package name match | Alpine Linux edge package indexes: libpsl from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | C library for the Publix Suffix List | https://rockdaboot.github.io/libpsl - apk - libpsl-dev - 0.21.5-r3: normalized package name match | Alpine Linux edge package indexes: libpsl-dev from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | C library for the Publix Suffix List (development files) | https://rockdaboot.github.io/libpsl - apk - libpsl-doc - 0.21.5-r3: normalized package name match | Alpine Linux edge package indexes: libpsl-doc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | C library for the Publix Suffix List (documentation) | https://rockdaboot.github.io/libpsl - apk - libpsl-static - 0.21.5-r3: normalized package name match | Alpine Linux edge package indexes: libpsl-static from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | C library for the Publix Suffix List (static library) | https://rockdaboot.github.io/libpsl - apk - libpsl-utils - 0.21.5-r3: normalized package name match | Alpine Linux edge package indexes: libpsl-utils from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz | C library for the Publix Suffix List (utils) | https://rockdaboot.github.io/libpsl - dnf - libpsl - 0.21.5-7.fc44: normalized package name match | Fedora Rawhide package metadata: libpsl from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst | C library for the Publix Suffix List | https://rockdaboot.github.io/libpsl - dnf - libpsl-devel - 0.21.5-7.fc44: normalized package name match | Fedora Rawhide package metadata: libpsl-devel from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/e5ca8ce900cd68f5419e1c39ae517343100b306336cbaeb70a3c153121d95094-primary.xml.zst | Development files for libpsl | https://rockdaboot.github.io/libpsl ## 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. - [Networking and protocol packages](https://www.automicvault.com/pkg/networking-protocol-tools/) - Matched network, protocol, or remote-service metadata. - [Web development packages](https://www.automicvault.com/pkg/web-dev-tools/) - Matched web development metadata. - [pkgconf](https://www.automicvault.com/pkg/brew/pkgconf/) - Build dependency declared by Homebrew. - [curl](https://www.automicvault.com/pkg/brew/curl/) - Popular package that depends on this formula. - [transmission-cli](https://www.automicvault.com/pkg/brew/transmission-cli/) - Popular package that depends on this formula. - [wget](https://www.automicvault.com/pkg/brew/wget/) - Popular package that depends on this formula. - [wget2](https://www.automicvault.com/pkg/brew/wget2/) - Popular package that depends on this formula. - [httrack](https://www.automicvault.com/pkg/brew/httrack/) - Shares av.db curated category or tags: cli, networking, web. - [gensio](https://www.automicvault.com/pkg/brew/gensio/) - Shares av.db curated category or tags: c-library, cli, networking. - [getdns](https://www.automicvault.com/pkg/brew/getdns/) - Shares av.db curated category or tags: c-library, cli, networking. - [gsasl](https://www.automicvault.com/pkg/brew/gsasl/) - Shares av.db curated category or tags: c-library, cli, networking. - [ldns](https://www.automicvault.com/pkg/brew/ldns/) - Shares av.db curated category or tags: c-library, cli, networking. - [libdnet](https://www.automicvault.com/pkg/brew/libdnet/) - Shares av.db curated category or tags: c-library, cli, networking. - [libexosip](https://www.automicvault.com/pkg/brew/libexosip/) - Shares av.db curated category or tags: c-library, cli, networking. - [libfabric](https://www.automicvault.com/pkg/brew/libfabric/) - Shares av.db curated category or tags: c-library, cli, networking. - [libnl](https://www.automicvault.com/pkg/brew/libnl/) - Local package facts share a topical domain. Shared terms: c-library, cli, list, networking. ## Combined YAML source View the package source record on GitHub. [combined/libpsl.yml](https://github.com/automic-vault/db/blob/main/combined/libpsl.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