How to create a zip file or folder in Windows

With the rise of cloud storage platforms like OneDrive, SharePoint, Google Drive, and Dropbox, it’s easy to assume file compression is becoming obsolete. In practice, the opposite is true.

ZIP files remain a critical tool in IT workflows, especially when dealing with:

• Email attachment size limits
• Secure file transfers
• Log bundles and diagnostic exports
• Software packaging
• Backup archives
• Cross-platform file sharing

In enterprise environments, ZIP files are still frequently used to bundle, compress, and standardise file delivery, particularly when working across different operating systems or restrictive email gateways.

What Is a ZIP File (and Why Compression Helps)

A ZIP file is a compressed archive format that allows multiple files and folders to be combined into a single container while reducing overall file size.

Compression works by:

• Removing redundant data
• Optimising how files are stored
• Applying algorithms that reduce storage overhead

From real-world experience, the biggest benefits aren’t always raw compression ratios — they’re portability, simplicity, and predictability.

One file is always easier to:

• Upload
• Download
• Scan
• Track
• Secure

When You Should Use ZIP Files (Practical Examples)

In day-to-day IT operations, ZIP files are commonly used for:

• Sending log bundles to vendors or support teams
• Packaging scripts or deployment files
• Exporting mailbox data or reports
• Migrating data between systems
• Archiving old project files

ZIP compression is especially valuable when:

• Email systems enforce attachment limits (often 10–25 MB)
• Files must pass through security gateways
• You need to preserve folder structures exactly

How to Create a ZIP File or Folder Using Built-In Windows Tools

Windows includes native ZIP support — no additional software required. This works on Windows 7, Windows 10, and Windows 11.

Step-by-Step: Create a ZIP File in Windows

1. Select your files or folders
   • You can select a single folder
   • Or highlight multiple files using Ctrl or Shift
2. Right-click the selection
3. Choose Send to → Compressed (zipped) folder

Windows will instantly create a ZIP archive in the same directory.

4. Rename the ZIP file
   • Use a meaningful name (especially important for IT workflows)

That’s it — your ZIP file is ready for transfer or storage.

Extracting (Unzipping) Files in Windows

For recipients, extracting files is just as straightforward:

1. Right-click the ZIP file
2. Select Extract All…
3. Choose a destination folder
4. Click Extract

Windows will restore the original folder structure and files.

From experience, this is one of the main reasons ZIP remains popular — native support requires zero training.

Limitations of Built-In Windows ZIP Compression

While Windows ZIP support is convenient, it has not evolved much over the years.

Key limitations include:

• No control over compression level
• No archive splitting
• Limited encryption support
• Slower performance with large datasets
• No advanced error recovery

For casual use, this is fine. For professional workflows, it’s often not enough.

Using Third-Party Tools to Create ZIP Files (Recommended for IT Pros)

If you regularly work with large datasets, automation, or secure file transfers, third-party tools are worth using.

Popular Third-Party ZIP Tools

1. 7-Zip (Highly Recommended)

• Free and open-source
• Excellent compression ratios
• Supports ZIP, 7z, TAR, GZIP, and more
• AES-256 encryption
• Command-line support for automation

From an IT perspective, 7-Zip is usually the best default choice.

2. WinRAR

• Widely used in enterprise environments
• Strong recovery and archive repair features
• Supports archive splitting
• Paid software (with trial period)

Advanced ZIP Features IT Professionals Actually Use

Compression Levels

Higher compression:

• Reduces file size
• Increases CPU usage and processing time

Lower compression:

• Faster
• Better for already-compressed files (videos, images)

In real-world use, medium compression is often the sweet spot.

Password Protection and Encryption

ZIP files can be password-protected, but not all encryption is equal.

• Basic ZIP encryption → weak
• AES-256 (7-Zip, WinRAR) → strong

For sensitive data:

Always use AES-256 encryption and share passwords securely.

Splitting ZIP Files

Some tools allow archives to be split into chunks (e.g. 100 MB parts), which is useful when:

• Upload limits exist
• Files need to be transferred across unstable connections

Security Considerations When Using ZIP Files

ZIP files can be:

• Blocked by email filters
• Scanned by antivirus engines
• Used as malware delivery mechanisms

Best practices:

• Never trust ZIP files from unknown sources
• Scan extracted contents
• Avoid password-protected ZIPs from untrusted senders

In enterprise environments, ZIP files are often inspected more heavily than regular files.

ZIP Files vs Modern Alternatives

ZIP is not always the best choice.

Alternatives include:

• Cloud sharing links (OneDrive, SharePoint)
• ISO images (for system snapshots)
• TAR/GZIP (Linux environments)

That said, ZIP remains the most universally supported archive format across platforms.

Common Mistakes I See in the Field

• Compressing already-compressed files (wasted effort)
• Using weak passwords for sensitive data
• Sending ZIP files without explaining contents
• Assuming compression equals encryption (it doesn’t)

ZIP files are simple — but misuse can still cause issues.

Final Thoughts: ZIP Files Are Simple — But Still Essential

Creating a ZIP file in Windows is easy. Using ZIP files well is where experience matters.

Despite modern cloud platforms and file-sharing tools, ZIP archives remain:

• Reliable
• Predictable
• Platform-agnostic

For IT professionals, they’re not just a convenience — they’re a fundamental part of data handling, troubleshooting, and file distribution.

Knowing when to use Windows’ built-in tools versus third-party utilities — and understanding the security implications — is what separates casual users from experienced operators.

Daniel Lutton

From my early days on the helpdesk through roles as a service desk manager, systems administrator, and network engineer, I’ve spent more than 25 years in the IT world. As I transition into cyber security, my goal is to make tech a little less confusing by sharing what I’ve learned and helping others wherever I can.