Protect & Lock DOCX

Secure your sensitive documents with military-grade encryption in seconds

Protect & Lock DOCX is a completely free online tool that allows you to add password protection to your Microsoft Word documents. With our state-of-the-art encryption technology, you can safeguard your confidential files from unauthorized access.

Whether you're sharing financial reports, legal documents, or personal information, our tool ensures that only authorized individuals with the correct password can open your DOCX files. No registration required - your files are processed securely in your browser and never leave your device.

Secure Your Document

Drag & Drop your DOCX file here
or click to browse files (max 50MB)
File:
Size:

Download Protected File

Your password-protected document will appear here after processing. Download it securely to your device.

Military-Grade Security

Uses AES-256 encryption, the same standard trusted by governments and security experts worldwide.

Lightning Fast

Protect documents in seconds with our optimized processing engine. No waiting times.

No Upload Required

All processing happens in your browser. Your files never leave your computer.

Completely Free

No subscriptions, no hidden fees. Protect unlimited documents at no cost.

Frequently Asked Questions

Is this service really free to use?
Yes, Protect & Lock DOCX is completely free to use. There are no hidden fees or subscriptions. You can protect as many documents as you need without any limitations.
How secure is the encryption?
We use AES-256 encryption, which is the industry standard for securing sensitive data. This is the same encryption level used by banks and military organizations. Your documents are protected with military-grade security.
Are my files uploaded to your servers?
No, all processing happens directly in your browser. Your files never leave your computer and are not uploaded to any server. This ensures maximum privacy and security for your sensitive documents.
What is the maximum file size I can protect?
You can protect DOCX files up to 50MB in size. This should accommodate most documents including those with images and embedded content.
Can I open the protected file without special software?
Yes, your protected document will open in any recent version of Microsoft Word (2010 or newer) or compatible office suites like LibreOffice. Simply enter the password you set when opening the file.