The 7z format uses high-ratio compression (LZMA/LZMA2), which often makes files significantly smaller than standard ZIP archives.
While the 7-Zip software itself is safe, you should exercise caution when opening compressed archives from unknown sources, as they can contain malware or viruses. How to Open It
The extension indicates that the file contains one or more compressed items, such as text documents, images, or folders, bundled into a single smaller file to make sharing or storage easier. Key Details
A file named is a compressed archive created with 7-Zip , a popular open-source compression tool.