Make a ZIP file smaller, or pack files into a new one at the strongest setting.
Add files to begin. Files that are already compressed (JPG, MP4, PDF and so on) are stored as they are.
Drop a ZIP file to repack it, or any files to pack into a new ZIP.
Smallest gives the smallest file and takes a little longer.
See how much smaller it became, then download it.
No. It is opened and packed again in your browser.
Text, documents, spreadsheets and code often shrink a lot more. Photos, videos, music and PDFs are already compressed, so they hardly change. The tool stores those as they are and tells you when nothing was gained.
No. Every file inside is kept exactly the same. Only the way it is packed changes.
It may be damaged, password protected, or not really a ZIP file. Password-protected ZIP files are not supported.
Up to 300 MB of files in one go, and up to 2,000 files inside a ZIP. This protects your browser from very large or booby-trapped archives.