PDF Locker - Password Protect PDF
Add strong password protection to your PDF files. 128-bit AES encryption ensures your documents stay secure and private.
Drag & Drop PDF to Protect
or click to browse files
Max file size: 25MB
Security Settings
File Status
No file selected
PDF Secured Successfully
128-bit AES Encryption
Password Protected
Military-Grade Encryption
128-bit AES encryption ensures your PDF files are completely secure.
No Server Uploads
All processing happens in your browser. Your files never leave your computer.
Instant Protection
Password protect PDF files in seconds with our optimized tool.
Unlimited Usage
No limits on file size or number of files. Protect as many PDFs as you need.
Free Online PDF Locker & Password Protection Tool
WebToolBazar's PDF Locker provides military-grade security for your sensitive documents. Whether you need to protect financial reports, legal documents, or personal files, our tool adds strong password protection with 128-bit AES encryption—all within your browser without uploading to any server.
Why Password Protect PDF Files?
- Confidentiality: Keep sensitive information private from unauthorized access.
- Legal Compliance: Meet data protection regulations for client documents.
- Digital Rights Management: Control who can view, print, or edit your PDFs.
- Secure Sharing: Safely share confidential documents via email or cloud storage.
How to Lock a PDF with Password?
- Upload PDF: Select the PDF file you want to protect from your device.
- Set Password: Create a strong password (minimum 6 characters).
- Choose Security Level: Select between Basic, Standard, or High security options.
- Download Protected PDF: Your password-protected PDF is ready to download.
Note: Remember your password! If you forget it, we cannot recover your PDF as all encryption happens locally in your browser. We recommend keeping a backup of your original file.