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How to set a password to protect your PDF from unauthorized use by using A-PDF Password Security?

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I'm going to send a confidential document by email. It has been saved as PDF format file. In order to prevent leakage network, I would like to set a password for PDF document so that protect unauthorized people open it. Please recommend an A-PDF tool.


According to your need, you can use A-PDF Password Security to add security password for your PDF documents. Once done, you can rest assure to send the PDF file to your clients by email, both safe and reliable. Read on below article to learn the detail step:

Step1: If you just need to add password to a PDF, you should choose option: Single PDF Document Security, if you need to batch add password to more PDFs, you should choose option: Batch PDF Documents Security;


Step2: Click next to add PDF file and set password, control which action should be limited: open, print, edit, copy and so on;


Step3: Click save as to add password.

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