: Choose Ultra for the highest possible ratio.
: Use LZMA2 , which is faster and more efficient for modern multi-core processors. CGV.7z
You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. Creating Encrypted ZIP files with 7-Zip - DCU : Choose Ultra for the highest possible ratio
If you prefer using the command line ( 7z.exe ), you can "generate" an ultra-compressed archive with specific parameters to ensure the best result: You don't need to register or pay for 7-Zip
-ms=on : Enables solid archiving for better overall compression.
: Increase this (e.g., to 64MB or higher) if you have enough RAM. A larger dictionary allows the archiver to find more patterns in the data, leading to a "better" (smaller) piece of compressed data.