100% Browser-Based
No software installation required.
Password Protect PDF for Free Without Software
Encrypt your PDF with a password for free. No downloads, no installation, and no complicated setup—everything works securely in your browser.
Free Online PDF Password Protection
Protect PDF files without installing any software.
Whether you're using Windows, Mac, Linux, Android, or iPhone, you can password protect PDF files directly from your browser without downloading any applications.
With iMZi PDF, simply upload your document, create a password, and download your encrypted PDF for free. Your protected file is ready to share securely.
How to Password Protect a PDF Online
Protect your PDF in three easy steps.
1. Upload Your PDF
Choose the PDF you want to encrypt.
2. Set Your Password
Create a secure password to protect the document.
3. Download the Protected PDF
Save your encrypted PDF and share it safely.
Why Choose iMZi PDF
Fast, free, and secure PDF protection.
Free PDF Protection
Encrypt PDFs online at no cost.
Works on Any Device
Use Windows, Mac, Linux, Android, or iPhone.
Private & Secure
Your PDF files stay protected throughout the process.
Encrypt PDFs Online Without Software
Password protect PDF files directly in your browser for free without downloading or installing any software.
Email Attachments
Business Documents
School Assignments
Personal Records
Financial Documents
Cloud Storage Files
Frequently Asked Questions
Find answers to common questions about this tool.
Protect PDF Files Online for Free
Encrypt PDF documents with password protection without installing software using iMZi PDF.