A .7z file is essentially a digital "container" that holds one or more files in a shrunk-down format.
The extension represents a compressed archive created with 7-Zip , a free and open-source file archiver . It is widely considered one of the best tools for compressing and extracting files because of its superior compression ratios and high security. What is a .7z File? Fit.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. WinZip Opens & Extracts 7Z Compressed Archive Files Fit.7z