How to Password Protect a ZIP File: A Simple Guide for 2025

Whether you’re a startup founder sharing sensitive documents or a student submitting an assignment, protecting your files is crucial. One of the simplest ways to secure multiple files is by compressing them into a ZIP file and adding a password. In this blog, we'll cover what a ZIP file is and walk you through how to password protect a ZIP file step by step.

What is a ZIP File?

A ZIP file is a compressed folder that can contain one or more files. It reduces the overall size and helps in organizing and transferring data efficiently. ZIP files are widely used for:

• Sending multiple files in one package

• Reducing file size for faster uploads/downloads

• Protecting file integrity during transfers

But while compression is great, security is often an afterthought. That’s where password protection comes in.

Why Password Protect a ZIP File?

Password-protecting a ZIP file adds a crucial layer of security, especially when you're sharing confidential data via email or storing sensitive information.

Benefits include:

• Preventing unauthorized access

• Maintaining data privacy

• Ensuring secure file sharing

So, how do you do it? Let’s break it down.

How to Password Protect a ZIP File (Windows)

Using Built-In Tools (Windows does NOT support password protection natively):

Unfortunately, Windows File Explorer doesn't offer a way to add a password to a ZIP file. You’ll need third-party tools.

Using 7-Zip (Free & Reliable)

1. Download and install 7-Zip

2. Right-click the file or folder you want to compress

3. Choose 7-Zip > Add to archive

4. In the dialog box, set the archive format to zip

5. Under the Encryption section:

   • Enter your desired password

   • Set encryption method to AES-256

6. Click OK

That’s it! Your ZIP file is now password-protected.

How to Password Protect a ZIP File (Mac)

Using Terminal:

1. Open Terminal

2. Navigate to the folder containing your files:

   cd

3. Use the following command:

   zip -e

4. You'll be prompted to enter and verify the password

Your encrypted ZIP file is now ready.

Using Keka (User-Friendly App for Mac)

1. Download Keka

2. Open the app, choose ZIP format

3. Enter a password

4. Drag and drop your files into the Keka window

5. Your password-protected ZIP file will be created automatically

Common Questions

How do I password protect a ZIP file without installing software?
Use web-based tools like WinZip Online, but be cautious about uploading sensitive data to third-party servers.

Can I add a password to an existing ZIP file?
No, you generally need to create a new ZIP file with password protection from scratch.

How secure is password protection on ZIP files?
If you use AES-256 encryption, it’s quite secure. Basic ZIP encryption, however, is weak and can be cracked easily. Always choose strong encryption methods.

Final Thoughts

If you're handling confidential startup documents, consider integrating secure file sharing into your workflow. Tools like Plox offer password-protected data rooms, access control, analytics, and branding, all in one place.

Still want to DIY it? Now you know exactly how to password protect ZIP files, whether you're using Windows or Mac.