install

Additional install commands

macOS

Homebrewverified · 100%

brew install simdutf

local Homebrew formula metadata

MacPortsverified · 94%

sudo port install simdutf

MacPorts ports tree · textproc/simdutf/Portfile · source: api.github.com

Linux

Alpine Linux apkverified · 92%

sudo apk add simdutf

Alpine Linux edge package indexes · simdutf · source: dl-cdn.alpinelinux.org

Fedora dnfverified · 92%

sudo dnf install simdutf

Fedora Rawhide package metadata · simdutf · source: dl.fedoraproject.org

Nixverified · 92%

nix profile install nixpkgs#simdutf

nixpkgs package indexes · pkgs/by-name/si/simdutf/package.nix · source: api.github.com

Arch Linux pacmanverified · 92%

sudo pacman -S simdutf

Arch Linux sync databases · simdutf · source: geo.mirror.pkgbuild.com

openSUSE zypperverified · 92%

sudo zypper install libsimdutf33

openSUSE Tumbleweed package metadata · libsimdutf33 · source: download.opensuse.org

overview

Package summary

Unicode conversion routines, fast

Project links

Commands and aliases

fastbase64
fastbase64.coreutils
sutf
sutf-benchmark

history

Project history and usage

simdutf is a C++ library and utility suite for high-speed Unicode validation, transcoding, encoding detection, and Base64 processing.

Project history

simdutf grew from Daniel Lemire and collaborators' work on vectorized Unicode processing into a portable C++ library. It provides scalar and SIMD implementations for multiple instruction-set families and chooses an appropriate implementation at runtime.

Adoption history

The official project lists production use in Node.js, Bun, WebKit, Chromium, Cloudflare workerd, GraalVM JavaScript, StarRocks, Couchbase, Ladybird, fluent-bit, Ghostty, and other performance-sensitive software. The input also records packages across Homebrew, Alpine, Fedora-family systems, MacPorts, Nix, Arch, and openSUSE.

How it is used

Developers link simdutf into C or C++ programs to validate UTF-8, detect encodings, count code points, and convert among UTF-8, UTF-16, UTF-32, Latin-1, and Base64. The package also supplies command-line utilities including sutf and fastbase64.

Why package nerds care

simdutf matters to package maintainers because Unicode validation and transcoding are common hot paths in runtimes, browsers, databases, terminals, and servers. Runtime selection of architecture-specific SIMD implementations lets a portable package exploit modern CPUs without requiring separate user-facing APIs.

Timeline

2021: simdutf emerged as a standalone open-source library.
2022: The project added broader Unicode transcoding and architecture support.
2023: Node.js adoption demonstrated substantial runtime performance gains.
2025: The project documented use across major browsers, runtimes, databases, and infrastructure software.

Related projects

The project applies techniques associated with simdjson to Unicode and Base64 processing. It can replace or complement lower-level conversion paths otherwise handled by libraries such as ICU in larger runtimes and applications.

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 1 runtime dependencies.
Build metadata lists 2 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
`fastbase64`	cli	global executable
`fastbase64.coreutils`	cli	global executable
`sutf`	cli	global executable
`sutf-benchmark`	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 generated2026-09-19

manager version9.2.0

manager updated2026-09-16

local dataok

upstreamcurrent

latest detectedv9.1.0

https://github.com/simdutf/simdutf

okNo freshness warnings were generated.

install metadata

Package metadata

Package key	brew:simdutf
Version	9.2.0
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/simdutf
Homepage	https://simdutf.github.io/simdutf/
Repository	https://github.com/simdutf/simdutf
Upstream docs	https://simdutf.github.io/simdutf/
License	Apache-2.0 OR MIT
Source archive	https://github.com/simdutf/simdutf/archive/refs/tags/v9.1.0.tar.gz
Last updated	2026-09-16T00:01:03Z
Pulse	updated
Dependencies	icu4c@78
Build dependencies	aklomp-base64, cmake
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	simdutf
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	head stable

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Nix95%

simdutf

nix profile install nixpkgs#simdutf

normalized package name match
Matched by: Simdutf

nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/si/simdutf/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

apk95%

fastbase64 9.0.0-r0

Unicode validation and transcoding at billions of characters per second

https://simdutf.github.io/simdutf/

sudo apk add fastbase64

License: Apache-2.0 OR MIT
Architecture: x86_64
Source Package: simdutf
1 dependencies
1 provides
normalized package name match
Matched by: Simdutf

Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: fastbase64 from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz

apk95%

simdutf 9.0.0-r0

Unicode validation and transcoding at billions of characters per second

https://simdutf.github.io/simdutf/

sudo apk add simdutf

License: Apache-2.0 OR MIT
Architecture: x86_64
Source Package: simdutf
1 dependencies
1 provides
normalized package name match
Matched by: Simdutf

Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: simdutf from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz

apk95%

simdutf-dev 9.0.0-r0

Unicode validation and transcoding at billions of characters per second (development files)

https://simdutf.github.io/simdutf/

sudo apk add simdutf-dev

License: Apache-2.0 OR MIT
Architecture: x86_64
Source Package: simdutf
1 dependencies
1 provides
normalized package name match
Matched by: Simdutf

Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: simdutf-dev from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz

apk95%

simdutf-doc 9.0.0-r0

Unicode validation and transcoding at billions of characters per second (documentation)

https://simdutf.github.io/simdutf/

sudo apk add simdutf-doc

License: Apache-2.0 OR MIT
Architecture: x86_64
Source Package: simdutf
normalized package name match
Matched by: Simdutf

Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: simdutf-doc from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz

apk95%

sutf 9.0.0-r0

Unicode validation and transcoding at billions of characters per second

https://simdutf.github.io/simdutf/

sudo apk add sutf

License: Apache-2.0 OR MIT
Architecture: x86_64
Source Package: simdutf
1 dependencies
1 provides
normalized package name match
Matched by: Simdutf

Alpine Linux edge package indexes · dl-cdn.alpinelinux.org · Alpine Linux edge package indexes: sutf from https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz

dnf95%

simdutf 7.2.1-3.fc44

Unicode validation and transcoding at billions of characters per second

https://github.com/simdutf/simdutf

sudo dnf install simdutf

License: Apache-2.0 AND BSD-3-Clause
Category: Unspecified
Architecture: i686
Source Package: simdutf
4 dependencies
2 provides
normalized package name match
Matched by: Simdutf

Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: simdutf from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/652278618dec9c023176a80c435a32a2c8154869fb0eb662c267a54df28d77d9-primary.xml.zst

dnf95%

simdutf-devel 7.2.1-3.fc44

Development files for simdutf

https://github.com/simdutf/simdutf

sudo dnf install simdutf-devel

License: Apache-2.0 AND BSD-3-Clause
Category: Unspecified
Architecture: i686
Source Package: simdutf
4 dependencies
3 provides
normalized package name match
Matched by: Simdutf

Fedora Rawhide package metadata · dl.fedoraproject.org · Fedora Rawhide package metadata: simdutf-devel from https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/repodata/652278618dec9c023176a80c435a32a2c8154869fb0eb662c267a54df28d77d9-primary.xml.zst

pacman95%

simdutf 9.0.0-2

Unicode routines (UTF8, UTF16, UTF32) and Base64

https://simdutf.github.io/simdutf/

sudo pacman -S simdutf

License: Apache-2.0 AND MIT
Architecture: x86_64
3 dependencies
normalized package name match
Matched by: Simdutf

Arch Linux sync databases · geo.mirror.pkgbuild.com · Arch Linux sync databases: simdutf from https://geo.mirror.pkgbuild.com/extra/os/x86_64/extra.db.tar.gz

zypper95%

libsimdutf33 8.2.0-2.4

Shared libraries for simdutf

https://github.com/simdutf/simdutf

sudo zypper install libsimdutf33

License: Apache-2.0 AND BSD-3-Clause
Category: Unspecified
Architecture: x86_64
Source Package: simdutf
4 dependencies
2 provides
normalized package name match
Matched by: Simdutf

openSUSE Tumbleweed package metadata · download.opensuse.org · openSUSE Tumbleweed package metadata: libsimdutf33 from https://download.opensuse.org/tumbleweed/repo/oss/repodata/d310d5a96106e1e8872a385adf98aaa23be9db5d80937a6717314e7e7f37715065c6c748ab7ccee6475d620b46979c0fe64235fc0c46988e17edf659578fcf31-primary.xml.zst

zypper95%

simdutf-devel 8.2.0-2.4

Development files for simdutf

https://github.com/simdutf/simdutf

sudo zypper install simdutf-devel

License: Apache-2.0 AND BSD-3-Clause
Category: Unspecified
Architecture: x86_64
Source Package: simdutf
2 dependencies
3 provides
normalized package name match
Matched by: Simdutf

openSUSE Tumbleweed package metadata · download.opensuse.org · openSUSE Tumbleweed package metadata: simdutf-devel from https://download.opensuse.org/tumbleweed/repo/oss/repodata/d310d5a96106e1e8872a385adf98aaa23be9db5d80937a6717314e7e7f37715065c6c748ab7ccee6475d620b46979c0fe64235fc0c46988e17edf659578fcf31-primary.xml.zst

MacPorts95%

simdutf

sudo port install simdutf

normalized package name match
Matched by: Simdutf

MacPorts ports tree · api.github.com · MacPorts ports tree: textproc/simdutf/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

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.

combined/simdutf.yml

Used sources

Geiger risk classifier
cross-ecosystem install command graph
curated package history
external package-manager database matches
package relationship graph
package version freshness
package-page enrichment
pkg.so package database
pkgdb category and tag curation

Install simdutf with Homebrew, apk, dnf, MacPorts, Nix, pacman, zypper

Additional install commands

macOS

Linux

Package summary

Project links

Commands and aliases

Project history and usage

Project history

Adoption history

How it is used

Why package nerds care

Timeline

Related projects

Sources

Risk level: green

Risk classifier

Why

Signals

Install behavior

Recommended review

Installed executables

Version and freshness

Package metadata

Source database details

Other package-manager records

Internal package links

Topical hubs

Related tools

Same workflow

Agent security guides

Generated from repository data

Combined YAML source

Used sources