php editor Yuzai will introduce you how to set a password for PDF files without an editor. Although there is no editor, you can still achieve this by using online tools or the command line. The specific steps will be introduced in detail below, allowing you to easily protect the security of your PDF files.
Since the operating system usually does not have a pre-installed PDF reader, we need to install one, such as Adobe Reader, Foxit Reader or QQ Reader, so that we can easily open and read PDF files.
In order to set the password for opening PDF files, you usually need to install a PDF editor. If you only need to set a password occasionally, consider using the 7-day free trial provided by Adobe.
Open the PDF file through Adobe, click [File] in the upper toolbar, and then click [Password Protection].
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In the pop-up page, select [7-day free trial] and follow the prompts.
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If you need to set a password for a long time, or if there is no trial option, you can also consider buying the PDF editor service product directly.
Another option is to use PDF-related tools, such as Pepsi Niu’s PDF tool. In the tool, you can select the [Add Password] module to set the opening password. If you want to clear the password or retrieve the password, there are also Corresponding modules can be selected.
Download Tool: Pepsi Niu PDF Password Recovery Tool
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