Websites often need to display many images, but each image can be very large, taking up a lot of storage space and consuming substantial bandwidth, which in turn increases server costs. This is when we need image compression technology. It can significantly reduce the space occupied by the images on your website.
Today, I’m introducing an image compression tool called Caesium. Caesium is an extremely useful software for reducing image file sizes. It can reduce image sizes by 90% while preserving their original quality, and it also supports batch compression. During operation, you can preview the images before and after compression in real time, making it easy to compare them.
Software Screenshots

Features
- Uses an intelligent compression algorithm, achieving image compression rates of up to 90%, and supports batch image compression.
- Supports common image formats such as JPG, BMP, PNG, GIF, and WMF.
- Easy previewing, with dual image display panels for convenient comparison of image quality before and after compression.
- Supports dual-panel compression levels, allowing you to set an individual compression level for each photo.
- Lets you customize image quality and compression levels; supports renaming file extensions.