Lock PDF with Password

Drag & Drop your PDF file to add password protection

Lock PDF with Password – Free & Secure PDF Protection ToolProtect your sensitive PDFs with strong password encryption. Our online PDF locker uses industry-standard security to ensure your documents remain private and secure. No registration required, completely free to use.

Password Protect PDFs

Add strong password protection to your PDF documents with industry-standard encryption.

Bank-Level Security

Use AES encryption technology trusted by financial institutions worldwide.

Fast Processing

Lock your PDFs in seconds with our optimized encryption engine.

100% Free & Unlimited

No signups, no fees, and no watermarks. Protect as many PDFs as you need.

Private & Secure

Your PDFs are processed securely and deleted automatically after 30 minutes.

Easy to Use

Simple interface - just upload your PDF, set a password, and download the protected file.

How to Lock PDF with Password

Secure your PDF documents with password protection in just a few simple steps.

Upload Your Files

Choose your files or drag and drop them into the PDF Password Protector tool.

Process & Convert

Click the convert button and let our PDF Password Protector tool process your files.

Download Results

Download your converted files individually or all at once in a ZIP file.

Lock PDF FAQs

How secure is the PDF password protection?
We use industry-standard AES encryption to protect your PDFs with strong password security.
Is there a file size limit for PDF locking?
There is no strict file size limit, but very large files may take longer to process.
Are my PDFs stored after password protection?
No, your PDFs are never stored permanently. All files are processed securely and deleted automatically after 30 minutes.
Do I need to register or pay?
No registration or payment is required. The PDF password protection tool is 100% free and unlimited.
What password requirements should I follow?
Use a strong password with a mix of letters, numbers, and symbols for maximum security.
Can I lock multiple PDFs at once?
Currently, you can process one PDF at a time for optimal security and processing speed.
Will the PDF quality be affected?
No, password protection does not affect the PDF quality or content - only access is restricted.