Why convert Z01 to 7Z?
A set of .z01/.z02/.zip segments is awkward to store and share; a single .7z file is easier to manage. The 7Z LZMA format also typically compresses 5-15% better than ZIP deflate on mixed files, which can reduce storage size for long-term archiving.
How to convert Z01 to 7Z
7-Zip OPEN-SOURCE
Right-click the final .zip > 7-Zip > Extract to a folder; then select the extracted files > 7-Zip > Add to archive, set format to 7z, and click OK.
PeaZip OPEN-SOURCE
Open the final .zip in PeaZip and extract; then use File > Create archive, choose 7Z format, add the extracted files, and confirm.
About these formats
.Z01
Split ZIP Archive - First Part
A .z01 file is the first segment of a ZIP archive that was split into several pieces (.z01, .z02, …, and a final .zip). You cannot open the .z01 directly - place all parts in one folder and…
Open .Z01 details →
.7Z
7-Zip Archive
A 7z file is a compressed archive in the 7-Zip format, created by Igor Pavlov in 1999. It bundles files and folders into one compressed container, often smaller than ZIP, and can include…
Open .7Z details →Quality & what to watch
- All split parts must be in the same folder; the
.z01alone cannot be extracted because the archive index lives in the final.zip. - Two steps are always required - no tool reads split ZIP volumes and writes 7Z in a single pass; ensure enough free disk space for both the extracted files and the new
.7z. - Both ZIP and 7Z are lossless, so no file content changes; already-compressed files such as JPEG or MP4 gain little additional size reduction.
Frequently asked questions
Can I open the .z01 directly in 7-Zip to create a 7Z?
.zip instead; 7-Zip reads the sibling volumes automatically and joins them during extraction.Is any data lost during the conversion?
.7z.
