Caesium

Download Caesium free for PC and phone

This photo processing tool offers efficient image compression with minimal loss of visual quality. Simply drag and drop your files—batch processing is supported—and adjust the optimization level from 1 to 100. The program can significantly reduce the size of your photos to save disk space or enable faster web uploads. Flexible settings help you find the perfect balance between file weight and picture clarity. The intuitive interface makes work fast, even with large archives.

10 Jun 2026

Title	Caesium
Size	21.2 MB
Price	free of charge
Category	Utilities
Developer	Matteo Paonessa
System	Windows

21.2 MB

284 reviews

2560

downloads

PEGI Rating

Caesium installation

Click on the Download button to start downloading Caesium for Windows from Maombi.com

Open the .exe installation file in the Downloads folder and double click it

Follow the instructions in the pop-up window to install Caesium on Windows Desktop

Now you can open and run Caesium on your PC

Caesium Features

Caesium makes it easy to optimize your image collection, significantly reducing file sizes without a substantial loss in visual quality. The program supports batch processing, saving time when working with large photo archives. You can flexibly adjust the compression level for each project, finding the ideal balance between file size and image clarity. A simple drag-and-drop interface makes the conversion process intuitive, even for beginners.

Batch Processing

Convert entire folders of images at once, saving time and effort.

Flexible Compression

Precise adjustment of compression level from 1 to 100 to control the size/quality balance.

Simple Interface

Easy management through file drag-and-drop and clear control elements.

Fast Conversion

Optimized algorithms ensure high-speed image processing.

Format Support

Works with popular graphic formats for universal use.

Visual Control

Ability to evaluate compression results to achieve optimal quality.

Caesium overview

01

Compress images without losing quality and reclaim disk space. A clean interface makes it fast to add files and configure compression settings. Select your desired quality level and format to get perfect results. Watch changes update in real time so you can be sure everything looks just right. Save memory and make your photo gallery more organized and manageable
02

Compress your images without losing quality using a simple, intuitive interface. Choose between formats like JPEG, PNG, and WebP, and adjust the quality settings to your liking. Easily add files for processing, and see the results side-by-side with the originals. Save disk space and speed up image loading, all while preserving their visual fidelity
03

Quickly and efficiently compress images to free up disk space. Conveniently select an output folder and fine-tune compression settings to avoid any file size increases. You can preserve the original folder structure and manage metadata like creation dates. It's easy to add or remove files, and you can view original and compressed versions side-by-side for comparison
04

Compress images without sacrificing quality through a user-friendly interface. Easily import files from folders and subdirectories, and set filters based on size and format. Streamlined controls keep extra clicks to a minimum, while the option to maintain folder structure helps keep your image library organized. Work quickly and effectively to reclaim valuable disk space
05

Easily compress images while keeping their quality intact. A handy interface lets you preview files and adjust compression parameters. Organize output files into your chosen folder and preserve the original directory layout. You can also skip files if the compressed version would end up larger, avoiding unnecessary loss and keeping your workflow efficient
06

Simplify your image workflow with a robust compression tool. Quickly review a list of files, assess their size and quality, and select the ones you want to process. Tweak compression settings to retain the detail you need, and pick an output folder for your finished images. Save disk space without compromising your photos—everything runs smoothly and feels intuitive