Nowadays, PDF files had been used widely in our works, our studies and daily life. Do you have a PDF document that has something very important you don't want any others know? Or do you need to send a PDF document by email that is so secure it needs a password to prevent others change it? Adding password to your PDF file will solve this problem perfectly. As a carrier of file, that is PDF’s outstanding place. Adding security to PDF will be a valuable way to secure the important data against unauthorized access. Some users may know little about how to add password to PDF file on Mac, in fact, there are three methods or PDF Tool for Mac you can choose:
The first method is using a third-party PDF protection tool. When talking about PDF protection tool, the best is Cisdem PDFManagerUltimate for Mac. With this application, you can set open passwords for your PDF files, preventing the PDF files from opening or reading. And you can also set owner passwords, preventing your PDF files from printing, editing, coping, and changing. It is a good helper for you to protect PDF or control the use of your PDF. In addition, Cisdem provides a free trial for everyone, you can click the “Free Download” button below to try it.
Step 1. Add Your PDF Files to This PDF Protection Tool
After downloaded and installed Cisdem PDFManagerUltimate on your Mac, you need to run it. And then you need to add PDF files those you want to add password to this PDF protection tool. Just drop and drag your PDF files to it.
Step 2. Add Password to PDF Files
Next, select a PDF, and click the lock icon on the top toolbar, then you will go to the encrypt panel. You know, PDF has two types of passwords, "user password" and "owner password", you can set either of them or both.
And you can also add detailed information to this PDF file, including title, author, keywords, creator, and subject. After finished it, click the “Encrypt”.
There is also online PDF service you can choose to add password to PDF file, PDFProtect. And the greatest strength of it is free. PDFProtect is an online tool that allows users to add password and permissions to your PDF files online. It is super easy-to-use, you just need to upload your PDF file, and input your password, click “Protect!”, it will add password to your PDF file.
You need to be careful with using online service. There are some risks you may face if you use online PDF service:
PDF directly by using Adobe Acrobat. Adobe Acrobat is powerful PDF tool, which provides comprehensive PDF solutions for users. The only drawback of it is the price is too expensive. But if you have installed it, it is OK.
Step 1. Open your PDF file on Adobe Acrobat.
Step 2. Click the Tools Pane at the top right in Acrobat to open the Protection panel.
Step 3. Click “Encrypt”, and select “Encrypt with Password”. In the Password Security Settings dialog box, you can add two types of passwords, open password restrict and permissions password restrict.
Step 4. Click OK and confirm the password chosen.
Step 5. Type a name for your file, and click "Save".
Mac users know that there is a built-in tool allows you to open your PDF files on Mac, Preview. Yes, it also can natively create secure password protected PDF documents, and it’s also impressively easy to do.
Step 1. Open the PDF file you want to add password on Mac Preview.
Step 2. Then you need to go to "File", and click "Export as PDF", then a window will pop up.
Step 3. Next, you need to click the "Show details" button to go to protection panel.
Step 4. Check out the "Encrypt", input your password and verify it.
Step 5. Save the PDF document as usual.
But Preview only allow users to add open passwords to prevent other access to your PDF, it not supports adding owner passwords to prevent your PDF files from printing, editing, coping, and changing.
Whatever, online PDF service is not a good choice for most people, unless you don't worry about the risks. Adobe Acrobat is the most powerful PDF tool for everyone, if you installed it already, it is your best choice. The features of Preview is limited, it isn’t a perfectly choice. For other people, Cisdem PDFManagerUltimate seems more attractive, it also does great in this respect. And in other ways, it's not worse than Adobe Acrobat except its price is cheaper.
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