You can generally re-pack various compressed archives from one format to another when you extract the original file (in this case ZIP) and compress the data again to a 7Z format. The difference is usually in the compression ratio and thus resulting file size.
Convert WinZIP Compressed ZIP archive to 7-ZIP compressed 7z archive.
We have found 10 software records in our database eligible for .zip to .7z file format conversion.
Microsoft Windows software - convert zip to 7z on Windows
A free file archiver developed by Igor Pavlov featuring higher compression ratios with LZMA and LZMA2 compression.
It is mainly available for Windows platform (for Mac and Linux are available command line tools) and is the primary program to handle 7z archives. However, also supports various compression file formats.
Packing / unpacking: 7z, XZ, BZIP2, GZIP, TAR, ZIP and WIM
Unpacking only: AR, ARJ, CAB, CHM, CPIO, CramFS, DMG, EXT, FAT, GPT, HFS, IHEX, ISO, LZH, LZMA, MBR, MSI, NSIS, NTFS, QCOW2, RAR, RPM, SquashFS, UDF, UEFI, VDI, VHD, VMDK, WIM, XAR and Z
Convert from zip file
to 7z file
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned zip to 7z. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
ALZip is compression utility that supports about 40 archive file formats. ALzip can open ALZ, ACE, EGG, RAR, ZIP etc.. Also can open disk images, such as ISO and BIN, LCD. ALZip is able to recovery passwords in protected ZIP archives.
PeaZip is free open source utility for Microsoft Windows and Linux. PeaZip can work with 118 archive types such as 7z, ARC, BZ2, GZ, ARJ, ACE, RAR, LHA CAB, DMG, PEA, etc..
Apple macOS / Mac OS X software - convert zip to 7z on OS X
A Mac version of a free compression utility that can extract popular archive formats such as RAR, 7Z, ZIP, as well as the native formats of ALZip - ALZ and EGG.
Ez7z for Mac OS X is compression utility that is able to expand 7z, bzip2, gz, rar, tar and zip archives. Ez7z also supports shrink data into 7z, zip, gz, tar and bzip2 archive formats.
sArchiver is compression utility that supports variety of compression formats. sArchive can create and extract RAR, ZIP, 7z, ARJ, LHA, Gzip, BZip2 and TAR archives. Also can convert between them.
StuffIt for Mac is archive utility that is able to create ZIP and SITX archives as well as extract 25 different formats including StuffIt, Zip, RAR and Tar.
StuffIt Deluxe for Mac is utility used to backup, share, archive, encrypt and shrink photos, music, and other documents. It supports variety of archive and compression file formats.
iPack is a full-featured compressed archives manager that allows users to compress 7z, zip, jar, and rar archives and decompress 7z, zip, jar, rar, cab, deb, iso, arj, gz and bz2 archives.
Linux/Unix software - convert zip to 7z on Linux
Xarchiver is a front-end application for various command line archiving applications for Linux and BSD operating systems. Xarchiver is default archiving application in Xfce and LXDE GUIs.