macOS
Homebrewverified · 100%
brew install caesiumcltlocal Homebrew formula metadata
brew
Install caesiumclt with Homebrew, winget
Fast and efficient lossy and/or lossless image compression tool. Version 1.3.0 via Homebrew; verified from local package data.
install
Additional install commands
Windows
Windows Package Managerverified · 92%
winget install --id SaeraSoft.CaesiumCLT -eWindows Package Manager source index · SaeraSoft.CaesiumCLT · source: cdn.winget.microsoft.com
overview
Package summary
Fast and efficient lossy and/or lossless image compression tool
Project links
Commands and aliases
- caesiumclt
history
Project history and usage
CaesiumCLT is the command-line member of the Caesium image-compression family, packaged for workflows where batch JPEG, PNG, WebP, and GIF optimization belongs in scripts rather than a desktop GUI.
Project history
The public caesium-clt repository dates to 2015 and describes itself as Caesium Command Line Tools. The current README presents the tool as a Rust command-line compressor built on libcaesium, with lossy, lossless, maximum-size, resize, conversion, metadata, recursive, and multithreaded modes.
The project changelog records a major migration to Rust in the 0.19 line and a 1.0.0 release that consolidated multi-format compression, resizing, format conversion, dry-run, overwrite policy, and recursive batch behavior. Subsequent 1.x releases added Homebrew-oriented release automation, GIF support, human-readable size limits, minimum-savings logic, faster scanning, and JSON output.
Adoption history
CaesiumCLT is distributed through developer and user package channels rather than only as release binaries: the official README documents Cargo, Homebrew, and Winget installs, and Homebrew carries it as the caesiumclt formula. Its audience is the overlap between web/media optimization users and shell users who want repeatable compression jobs.
How it is used
Common use is batch image compression from the shell: quality-based lossy compression, lossless optimization, recursive directory processing, conversion to WebP or JPEG, max-size targeting, and optional EXIF or timestamp preservation. The docs also expose scripting-friendly switches such as dry-run, quiet/verbose levels, thread count, and JSON output.
Why package nerds care
For package maintainers, CaesiumCLT is notable as a small media CLI that wraps a dedicated compression engine while staying easy to ship across Cargo, Homebrew, Winget, and GitHub release binaries. It is a useful example of a GUI-adjacent application family exposing a clean automation surface for CI image optimization and bulk asset cleanup.
Timeline
- 2015: Public caesium-clt repository created on GitHub.
- 2025: 1.0.0 release documents the core modern feature set.
- 2025: 1.1.0 adds GIF support and Homebrew installation notes.
- 2026: 1.3.0 release adds fast scanning and minimum-savings behavior.
Related projects
- libcaesium is the compression engine named by the README as the core library behind CaesiumCLT.
- The broader Caesium family includes SaeraSoft's graphical Caesium image compressor, while CaesiumCLT serves the command-line and automation use case.
Sources
security posture
Risk level: blue
broad file, network, media, or database tool signal.
Risk classifier
blue risk · medium confidence · tool
Why
- broad file, network, media, or database tool signal
Signals
- text:compress,image
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 6 platform targets.
- Build metadata lists 1 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 |
|---|---|---|---|
caesiumclt | 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 version1.3.0
manager updated
local dataok
upstreamcurrent
latest detectedv1.3.0
https://github.com/Lymphatus/caesium-clt
- infoNo package-manager update timestamp was available.low confidence
install metadata
Package metadata
| Package key | brew:caesiumclt |
|---|---|
| Version | 1.3.0 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/caesiumclt |
| Homepage | https://github.com/Lymphatus/caesium-clt |
| Repository | https://github.com/Lymphatus/caesium-clt |
| Upstream docs | https://github.com/Lymphatus/caesium-clt#readme |
| License | Apache-2.0 |
| Source archive | https://github.com/Lymphatus/caesium-clt/archive/refs/tags/v1.3.0.tar.gz |
| Build dependencies | rust |
| 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 | caesiumclt |
| Version Scheme | 0 |
| Revision | 0 |
| 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.
winget95%
SaeraSoft.CaesiumCLT
winget install --id SaeraSoft.CaesiumCLT -e- normalized package name match
- Matched by: Caesiumclt
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