Protect PDF with Password
Add 256-bit AES password encryption to your PDF files. Prevent unauthorized access to sensitive documents. Free, fast, and secure.
Why Protect PDF Files?
Password-protecting your PDF files ensures that only authorized people who possess the correct password can open and read your sensitive documents. This is absolutely essential for legal contracts, financial records and tax returns, medical reports containing patient information, HR documents, and any confidential business information that must remain private.
Our tool uses industry-standard 256-bit AES (Advanced Encryption Standard) encryption, which is the same powerful level of security used by banks, government intelligence agencies, and military-grade secure communications. This level of encryption is considered virtually unbreakable using any currently available computing technology.
How to Protect a PDF
- 1
Upload the PDF file you want to protect.
- 2
Enter a strong password for encryption.
- 3
Click Convert to encrypt your PDF.
- 4
Download the password-protected document.
Key Features
- 256-bit AES encryption
- Industry-standard security
- No software required
- Instant encryption
- Files auto-deleted after processing
Frequently Asked Questions
What encryption does this tool use? ▼
We use 256-bit AES encryption, which is the strongest encryption standard available for PDF files. It is virtually unbreakable with current technology.
Can I remove the password later? ▼
Yes, if you need to remove the password protection later, simply use our Unlock PDF tool and enter the original password. This will generate a new copy of the document without any encryption.
What happens if I forget the password? ▼
We do not store your password. If you forget it, you will not be able to open the protected PDF. Keep your password in a safe place.
Is the encryption process secure? ▼
Yes, all processing happens on our server with encryption in transit and at rest. Files are automatically deleted after 30 minutes.