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Founded in 2007, Tenorshare PDNob is trusted by millions to simplify work.
Protect PDF Online Free
Edit protected PDF or create password protected PDF online for free.
- 100% Free
- Secure & Private
- Easy to Use
4,368,933 files have been successfully protected for free.
How to Password Protect a PDF for Free?
Just 3 simple steps to encrypt and lock your PDF files online:
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Step 1
Choose your PDF files to upload on PDNob online.
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Step 2
Set a single password for all files or assign unique passwords to each.
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Step 3
Click “Protect PDF” to encrypt and instantly download your secured PDFs.
Why PDNob Stands Out
Quick, safe, and easy PDF protection with batch encryption and strong privacy.
Strong Password Encryption
Protect your PDFs with AES-256 encryption to block unauthorized access, editing, or printing. Keep your important documents safe and secure.
Batch PDF Encryption
Encrypt multiple PDF files at once. Set one password for all files or assign unique passwords to each. Flexible and convenient, far beyond similar tools.
Fast and Easy
Complete encryption within seconds. No technical skills required, and works smoothly on all devices including mobile.
No Installation Needed
Fully online with no downloads or plugins required. Works on Windows, macOS, Linux, Android, and iOS - protect your PDFs anytime, anywhere.
Clean Interface
Easy-to-use and no ads. No confusing steps or redirects. Just simple and fast PDF protection.
Privacy First
Your privacy matters. All uploaded files are automatically deleted from our servers to ensure your files are never saved or leaked.
Need More Than PDF Protection?
Try a Best PDF Editor for Professional.
This AI-powered PDF editor offers advanced editing, smart annotations,precise OCR scanning, and batch processing, etc —all offline. Ideal for students,professionals, and efficient document management.
FAQs about PDNob Free PDF Password Protection
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