Caesium is a free image compressor that can reduce the size of pictures up to 90% without losing from the original quality.
Preserving the original file format.
No additional software required for opening compressed files.
Compression without visual quality loss.
Set compression level with a simple slider.
Set different compression levels to each image.
Custom suffix support.
Side by side preview, with original and compressed pictures.
Watch details with zoom.
Custom visualization options.
Common file formats supported.
Datetime and metatag support.