Convert Between ZIP, TAR.GZ, and GZIP

Yes — every conversion path preserves the entry tree (folder names and file paths) exactly. File metadata is not carried over when the target is TAR.GZ: every entry's modified time is reset to the moment of conversion, Unix mode bits are normalised to 0644, and symlinks or hardlinks are flattened to regular files. A ZIP target keeps each entry's MS-DOS timestamp.

Not yet — 7Z write support is planned (see ZIP to 7Z). For maximum compression today, choose TAR.GZ; level-9 GZIP often matches 7Z to within 5–10% on text-heavy content.

It recompresses — every entry's data is decompressed and re-encoded under the target format's algorithm at DEFLATE level 6. This is necessary because ZIP stores each entry with its own DEFLATE stream, whereas TAR.GZ concatenates the files into an uncompressed TAR and then GZIP-compresses the whole thing as a single DEFLATE stream.