• Since PDF file is of reliable and loyalty to author and everyone can freely view the content of PDF file if the PDF is not password protected with a PDF reader. Sometimes its users even are able to directly change any part of the your PDF file. If you dont want to see it happen, you can choose to password protect your PDF documents. After adding password to PDF, you can keep PDF from editing or even opening by the others.• For those who have not done that before, its a little confused and hard to create password for PDF because there are so many methods you can choose to add password to PDF. To save your time on searching for the best way, here we would like to introduce the ubiquitous choice of common PDF users to you - with Adobe Acrobat. Just follow the tutorial below and learn the way.• Related Recommendation: If you have got some PDF files which need to be converted to HTML files on Mac, here we strongly recommend the best PDF to HTML for Mac software to you. It supports batch conversion, so you can convert them at one time with good quality and fast conversion speed.
Guide: How to Create Password for a PDF File with Acrobat?• Step 1: Run Adobe Acrobat and open the target PDF file with it. If you have not install Acrobat on your PC, please go to the Adobe Office website to download and install it.• Step 2: Go to "File" option on the top menu and choose "Document Security".
• Step 3: Then the prompt will show up and the default setting is No Security. Open the Security Options drop-down list and select "Acrobat Standard Security".
• Step 4: Here you can set PDF password as you need, User Password or Master Password. There are also other permissions you can choose for our PDF file.
• Step 5: A window opens asking you to confirm the password to open the document. After that, you will be asked to input the Master Password again. Do as it asks you to and finish the PDF password setting. Thats it. Now you have known how to make password for your PDF documents. In this way, your PDF files will be protected by password. Sound great? Why not try this by yourself? Hope helps!