100% In-Browser Secure — Files Never Leave Your Device

Protect PDF File

Encrypt your PDF document with a custom password to prevent unauthorized viewing.

High Resolution Render
No File Size Limits
Zero Registration Required
Choose PDF File to Protect
Click or drag & drop a PDF file

Password Protect & Encrypt PDF Documents

Secure your PDF files with 128-bit AES encryption and custom passwords to prevent unauthorized access, editing, or printing.

Strong Password Protection

Encrypts PDF files with user-defined passwords requiring authorization to open or view contents.

128-Bit AES Security

Uses industry-standard 128-bit AES encryption algorithms recognized by PDF readers worldwide.

Zero Cloud Server Uploads

Passwords and documents are processed 100% locally inside your browser session for maximum security.

Ideal for Confidential Docs

Protects financial statements, legal contracts, tax records, medical documents, and certificates.

Universal PDF Reader Support

Protected files prompt for password in Adobe Acrobat, Chrome PDF Viewer, Preview, and Foxit.

Watermark Free

Download encrypted PDF files without any unwanted branding or watermarks.

How to Password Protect a PDF File

1

Upload PDF

Select or drag & drop your PDF file into the upload zone.

2

Set Password

Type a strong password in the sidebar option field.

3

Click Encrypt

Click 'Encrypt & Save PDF' to lock the document.

4

Download Protected PDF

Download your encrypted PDF file safely.

Frequently Asked Questions

Can someone unlock my PDF without the password?

No. 128-bit AES encryption ensures that the correct password must be entered to decrypt and open the file.