Protect & Lock DOC

Secure your sensitive documents with military-grade encryption. Password-protect your files in seconds - all processing happens locally in your browser.

Select Document

Drag & drop your file here

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Supports DOC, DOCX, PDF, TXT, JPG, PNG (Max 100MB)

Security Settings

Password Strength Weak

Why Choose Protect & Lock DOC?

Our tool provides enterprise-grade security with a simple interface. All processing happens in your browser - no server uploads, no data stored.

Military-Grade Encryption

Your documents are secured with AES-256 encryption, the same standard used by governments and security experts worldwide.

100% Browser-Based

All processing happens locally in your browser. Your files never leave your computer, ensuring complete privacy.

Password Protection

Add strong password protection to prevent unauthorized access. Only those with the password can view your documents.

Secure Your Sensitive Documents

Protect & Lock DOC is a free online tool that allows you to encrypt and password-protect your important documents. Whether you're securing financial reports, legal documents, personal records, or confidential business information, our tool provides military-grade encryption to keep your files safe from unauthorized access.

How It Works

Our browser-based encryption tool uses AES-256, the industry standard for data security. When you upload a document, it is encrypted directly in your browser using your chosen password. The encrypted file is then downloaded to your computer. The original file is never uploaded to any server, ensuring complete privacy.

Key Benefits

  • Complete Privacy: Your files never leave your computer - all processing happens locally
  • No Registration Required: Use our tool immediately without creating an account
  • Zero Cost: Protect your documents completely free of charge
  • Cross-Platform: Works on Windows, Mac, Linux, iOS, and Android devices
  • No File Size Limits: Encrypt documents of any size (browser limitations apply)

Frequently Asked Questions

Yes, Protect & Lock DOC is completely free to use. There are no hidden fees, subscriptions, or premium features. Our goal is to provide accessible security for everyone.
No, your files never leave your computer. All encryption and decryption happens locally in your browser. We don't have access to your files at any point.
We cannot recover your password if you forget it. The encryption is designed so that only someone with the exact password can decrypt the file. We recommend using a password manager or storing your password securely.
You can protect any file type - DOC, DOCX, PDF, XLS, PPT, images, and more. Our encryption works on all file formats by securing the entire file.