What this tool does
- Contents are not re-encoded: files are copied as they are into the new container, byte for byte.
- The ZIP is compressed, and each file keeps the smaller of the two versions: an already-compressed photo is stored as is rather than inflated by a few bytes.
- The folder hierarchy is kept, and so are accented names: the format's UTF-8 flag is set.
- No clock: files carry a fixed date, so two conversions of the same archive produce the same bytes.
- Whatever could not be read, an encrypted entry or an exotic compression, is left out and listed.
What it does not do: We only convert what we can read: ZIP, TAR, TAR.GZ and GZ. A RAR or a 7z is recognised and named, but not opened, for the same reason as in “Open an archive”: it is a dependency we do not add. The ZIP produced is not encrypted and carries no password: this is not a protection tool. And a ZIP dropped in comes out as a ZIP, which is pointless: the tool says so rather than hand you a copy.
Nothing is uploaded. Cut your network connection once this page has loaded: the tool keeps working. How to check it yourself.
The other tools
- Merge PDFs: Several files, one document, in the order you decide.
- Organize pages: Reorder, rotate, delete, duplicate: the whole plan.
- Extract pages: Pick pages, take them out into a document of their own.
- Delete pages: Remove pages while looking at them; they are not left under the file you get.