ZIP File

Compressed Archive (.zip)

What is a ZIP file?

A ZIP file is a compressed archive that bundles multiple files and folders into one. ZIP often reduces file size and makes sharing easier. The archive preserves folder structure, filenames, and basic metadata.

Common uses

Compressing files to reduce size for sharing
Bundling many files/folders into one download
Emailing or uploading groups of documents
Packaging software releases or project folders
Creating backups of files in a single archive

How to open a ZIP file

Windows: Right-click → Extract All (built-in)
macOS: Double-click to extract (Archive Utility)
Mobile: Many file manager apps can unzip
Tip: If you see a password prompt, the ZIP is encrypted and needs the correct password

Common problems

Corrupt ZIP download causes extract errors
Password-protected ZIP can’t be opened without the password
Very large ZIPs can fail to extract on low-storage devices
Some ZIPs include nested folders that hide the real files
Malware can be packed inside ZIPs from untrusted sources

History

ZIP became popular as a general-purpose archive format because it’s simple, supported almost everywhere, and perfect for sharing multiple files at once. It remains one of the most common archive types online.