Packing several files into one ZIP means the other person downloads once. Extracting is the same idea: see what is inside, then download one file or take everything.
Tidy before you compress
Keep filenames short and readable. Avoid odd symbols when you can. Duplicate names get a numeric suffix during compress, but renaming first is clearer.
JPEG, MP4, and ZIP files rarely shrink much if you compress again. Use Store only for those; text, Word, and uncompressed images benefit more from Standard or Smallest.
Do not push huge folders through the browser at once. On a phone with little memory, split into a few smaller archives.
When you extract
Password-protected ZIP is not supported here. Remove the password on your device first, then extract.
The result list shows each file for single download. Multiple files can be re-packed into one ZIP. If you open several ZIPs together, entries are grouped under each archive name to reduce clashes.
Privacy
Compress and extract run in your local browser and are not uploaded to our servers. After you send a file in chat or email, you still follow that platform’s rules.