A .7z file is a compressed archive created using 7-Zip , an open-source file archiver. It is known for its high compression ratio, often outperforming standard ZIP files by . Key Features of the 7z Format

: Supports AES-256 encryption , making it a secure choice for archiving sensitive data.

: Can handle massive archives—up to 16 billion gigabytes .

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.