Protect PDF — Secure PDF Documents Free
Add password protection to any PDF — set an open password, an optional owner password, and fine-tune recipient permissions. Free and secure.
Why Choose Our Secure PDF Protect Tool?
AllCloudTools provides a state-of-the-art PDF protection tool designed to secure your confidential documents. You can set open passwords, restriction passwords, and individual user permissions.
Strong Encryption
Uses industry-standard encryption algorithms to secure your files.
Fine-Grained Permissions
Control exactly whether users can print, edit, copy text, or comment on your document.
Completely Safe
Processed securely in memory. Your password and files are never stored.
How to Secure Your PDF in 3 Simple Steps
Upload PDF
Select a PDF file from your local disk or drag it directly into the upload dropzone to begin.
Configure Security
Set the document open password, an owner password, and select allowed permissions.
Protect & Download
Click 'Protect PDF' to encrypt the file immediately, and download your protected document.
protected.pdf
AES-256 Bit
Frequently Asked Questions
Files are processed in memory on our secure servers and never stored. All uploaded files, passwords, and the encrypted PDF output are immediately and permanently deleted after you complete your download.
The Open (User) Password is required for anyone who wants to open and view the PDF document. The Permissions (Owner) Password is required to modify restrictions, such as printing, editing, or copying content.
Yes. When you configure the owner password, you can set specific checkboxes for print, copy, edit, annotations, and forms. Users will only be allowed to perform the actions you explicitly allow.
Yes, our tool secures your document using industry-standard PDF security protocols, making it extremely difficult to bypass without the correct password.
You can upload and encrypt PDF files up to 100 MB in size.