Caesium Image Compressor 
v2.4.1
What is it for
Caesium is an image compression software that helps you store, send and share digital pictures, supporting JPG, PNG and WebP formats.
You can quickly reduce the file size (and resolution, if you want) by preserving the overall quality of the image.
Supported Platforms
- Windows: 10 (build 1809 or later) (use old version v1.x for Windows 7 or 8 - link)
- MacOS: 10.15+
- Linux: tested on Ubuntu 22.04 and Manjaro
Note: only 64bit versions are supported
Installation
Head to the releases' page for the available downloads.
- Windows: installer and portable versions are available
- MacOS: DMG package
- Linux: compile the source code yourself, or download binary from third-party build
Troubleshooting and/or feature request
Please open an issue.
Build from source
Requirements
- Rust: required to compile libcaesium. Make sure you have
cargoexecutable on you$PATH - Qt6 SDK: binaries are built on 6.4.2 (open source)
- libssh: macOS only
- Sparkle: macOS only. Only version 1.27.1 is supported.
Build
Step 0 (macOS Only)
You need to set up Sparkle in order to compile the project
brew install --cask https://raw.githubusercontent.com/Homebrew/homebrew-cask/c6dfe6baf1639998ba1707f68668cf8fa97bac9d/Casks/sparkle.rb
sudo cp -R /usr/local/Caskroom/sparkle/1.27.1/Sparkle.framework /Library/Frameworks/Sparkle.framework
Step 1
You need to configure CMake first and the command is slightly different for all the platforms: Change the path in variables with the correct directories of the requirements.
Windows
cmake -B build_dir -DCMAKE_PREFIX_PATH=/path/to/Qt/version -DCMAKE_BUILD_TYPE=Release -G "MinGW Makefiles"
MacOS
cmake -B build_dir -DCMAKE_PREFIX_PATH=/path/to/Qt/version/macos -DLIBSSH_INCLUDE_DIR=/libssh/dir/include -DSPARKLE_INCLUDE_DIR=/usr/local/Caskroom/sparkle/1.27.1/Sparkle.framework/Versions/Current/Headers -DCMAKE_BUILD_TYPE=Release
Linux
Make sure you have all the requirements installed with you own package manager
cmake -B build_dir -DCMAKE_PREFIX_PATH=/path/to/Qt/version/gcc_64 -DCMAKE_BUILD_TYPE=Release
Step 2
Then you can build with
cmake --build build_dir --config Release --target caesium_image_compressor
Languages and translations
The 1.0 version of Caesium had a lot of community made translations, but this 2.0 release has a whole new set of strings and no old translations can be used anymore.
Caesium 2.0 is currently available in:
ar_EG
de_DE
el_GR
en_US
es_ES
fr_FR
id_ID
it_IT
ja_JP
pl_PL
pt_BR
ru_RU
sk_SK
tr_TR
zh_CN
zh_TW
How to contribute with your translation
You can help translate by opening the resources/i18n/caesium_en_US.ts with QtLinguist or any XML editor. Rename it to your language (e.g. caesium_it_IT.ts) and translate all the sentences. Then you can start a pull request with your translated file.
See this pull request as an example.
Thanks to all the people who contributed.