Files
Caesium
Shrink a folder of photos before uploading it
Desktop appFree Windows and macOS desktop app · batch compression
Open Caesium Why this one
Reduce many photo files together and preview the trade-off. Choose it over a one-image web compressor when you have a folder of product shots or trip photos to prepare.
Try this first
Try three copied photos first. Set a quality or resize option, choose a separate output folder and compare the smaller files at full size before processing the rest.