Protect PDF
Encrypt your PDF with a password.
Set permissions and secure your sensitive
information.
or drag and drop PDF here
Your files are processed securely
Strong Encryption
Choose between standard 128-bit or military-grade 256-bit AES encryption.
Granular Permissions
Control printing, copying, and modification rights for your document.
How to Password Protect a PDF Online
1. Upload Your PDF
Drag and drop your document into the box above or click "Select PDF File". We support large files and high-resolution documents.
2. Choose Encryption Settings
Set a strong password to open the file. You can also add a separate owner password to control permissions like printing or editing.
3. Apply Security
Click "Protect PDF". Our tool will apply 128-bit or 256-bit AES encryption to your file instantly.
4. Download Secured File
Save your protected PDF. The file is now encrypted and safe to share via email or cloud storage.
Why use our PDF Encrypter?
Military-Grade Encryption
We use AES (Advanced Encryption Standard) 256-bit encryption, the industry standard for securing sensitive data.
Granular Permissions
Prevent unauthorized copying, printing, or editing. You remain the owner of your content.
Fast & Secure
All processing happens via secure SSL connections. Files are automatically deleted from our servers after 15 minutes.
Cross-Platform
Works on Windows, Mac, Linux, iOS, and Android. No software installation required.
Frequently Asked Questions
How secure is the password protection?
We use 256-bit AES encryption, which is virtually impossible to crack with brute force. It provides the highest level of security for your PDF documents.
Can I prevent someone from printing my PDF?
Yes! In the permissions section, select "None" under "Printing Limit". Users will be able to view the file but the print option will be disabled.
Do you store my files?
No, we prioritize your privacy. All uploaded and processed files are automatically deleted from our servers after 15 minutes.
Is this service free?
Yes, One PDF Editor is completely free to use. There are no limits on the number of files you can protect.