mini Online PDF Security Tool

To secure your PDF documents from unauthorized access like copying or printing, you should password protect your file! Protect PDF files by adding a password and encrypt it.

Select a PDF encryption version from the Compatibility drop-down menu. Choose a version equal to or lower than the recipients' version of Acrobat or Reader.

The Compatibility option you choose determines the type of encryption used. It is important to choose a version compatible with the recipient's version of Acrobat or Reader. For example, Acrobat 7 cannot open a PDF encrypted for Acrobat X and later.

• Acrobat 6.0 And Later (PDF 1.5) encrypts the document using 128-bit RC4.
  
• Acrobat 7.0 And Later (PDF 1.6) encrypts the document using the AES encryption algorithm with a 128-bit key size.
  
• Acrobat X And Later (PDF 1.7) encrypts the document using 256-bit AES. To apply 256-bit AES encryption to documents created in Acrobat 8 and 9, select Acrobat X And Later.

Online PDF Security Tool does encrypt and set document restrictions, including:

• Print document
  
• Modify document content
  
• Extract or copy content
  
• Add comments
  
• Fill in form fields
  
• Content extraction for accessibility
  
• Assemble documents
  
• Print in high resolution
  
• Set encryption strength
  
• Set owner and user password
  
• Optimize for the web (linearize)

Protect your PDF documents from unauthorized access with standard password security:

• 40-bit RC4 encryption, which is supported by Adobe Acrobat 3.0 or above.
  
• 128-bit RC4 encryption, which is supported by Adobe Acrobat Reader 5.0 or above.
  
• 128-bit AES encryption, which is supported by Adobe Acrobat Reader 7.0 or above.
  
• 256-bit AES encryption, which is supported by Adobe Acrobat Reader 9.0 or above.