To create a single .zip archive from a split pieces (.z01, .z02, .z03 etc.) you first need to gather all the parts and then merge them using any of the available file archives, such as WinZIP or WinRAR. It's not much of a conversion in the proper sense, more like repacking.
Convert Split Multi-volume ZIP compressed file archive (part 3) to WinZIP Compressed ZIP archive.
We have found 4 software records in our database eligible for .z02 to .zip file format conversion.
Microsoft Windows software - convert z02 to zip on Windows
Another popular file archiver and compressor
Convert from z02 file format
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 z02 to zip. 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.
One of the oldest and most popular shareware file archiver and data compression utility
Apple macOS / Mac OS X software - convert z02 to zip on OS X
Mac version of the popular WinZip compression utility.
Linux/Unix software - convert z02 to zip on Linux
A Linux application used as frontend for popular compression tools