Upload many images at once and quickly reduce their size.
Your files are compressed here on your browser without being uploaded anywhere. They stay on your machine.
The algorithm may not be lossless but you can select a high quality percentage to have nearly indistinguishable results.
Files are processed and compressed on your browser without being uploaded to any server. Your files will never leave your machine.
A zip file is a compressed file format that contains many other files. Once extracted, you can use the files.