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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.

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Caesium Image Compressor

v2.2.1

caesium_screenshot_20220915


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: 7+
  • 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: no binaries are available right now, you must compile the source code yourself

Troubleshooting and/or feature request

Please open an issue.

Build from source

Requirements
  • Rust: required to compile libcaesium. Make sure you have cargo executable on you $PATH
  • Qt6 SDK: binaries are built on 6.2.4 (open source)
  • libssh: macOS only

Build

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 -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:

  • 🇺🇸 English 100%
  • 🇮🇹 Italian 100%
  • 🇫🇷 French 95%
  • 🇯🇵 Japanese 96%
  • 🇨🇳 Simplified Chinese 95%
  • 🇪🇸 Spanish 89%
  • 🇪🇬 Arabic (Egypt) 95%
  • 🇩🇪 German 95%
  • 🇷🇺 Russian 100%
  • 🇹🇷 Turkish 97%

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.
You can use this pull request as an example. Thanks to all the people who contributed.

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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.

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