What are ZIP files?
In the case of ZIP there is a special file format for compressed data. ZIP-files have the extension ".zip", text files have, for example, the file extension ".txt".
- A ZIP file has two major advantages: ZIP-files serve as a Container and can thus take in a file and numerous other files and folder together. So you can packaging, for example, multiple documents, images, and folders in a single file to send.
- On the other hand, the data size of the packaging in a ZIP-file significantly. Depending on the size of the file, several percent of the original size of the file can be saved. So a 4 GB big movie is from a 4.5 GB movie in a ZIP file easily.
- With programs like 7-Zip or WinZip, you can create your own ZIP files can open, create, and edit. To Open a ZIP file, you need no additional Software. Windows can open ZIP files and extract.

ZIP files with 7-Zip open
In the next practical tip we show you how to ZIP files online and unzip it. To minimize the possible risks, when you receive a ZIP file from an unknown source.