7z a -t7z -mx=9 -m0=lzma2 -md=64m -ms=on output_filename.7z input_folder_or_file Use code with caution. Copied to clipboard -mx=9 : Sets the compression level to "Ultra." -md=64m : Sets a 64MB dictionary size.
To create a high-quality 7z archive with maximum compression, use these settings in the 7-Zip GUI or online creators like ezyZip: : Select 7z . CGV.7z
-ms=on : Enables solid archiving for better overall compression. 7z a -t7z -mx=9 -m0=lzma2 -md=64m -ms=on output_filename
: Choose Ultra for the highest possible ratio. CGV.7z
: 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.