PDF files are password-protected, and it may depend on the PDF converter whether the PDF converter is able to convert the PDF file format. Because I have also encountered a similar situation. So let's take a converter as an example to see how a PDF file with a password can be converted. Let's take Okayfeng PDF Converter as an example.
First, we need to prepare two PDF files, one to set the open password, and one to set the restricted editing password. Both passwords test the PDF converter's ability to convert PDF files separately.
The first is to add the file with the password to open the PDF to the PDF converter. We can see that the PDF file with the password to open has been imported into the PDF converter and the password has been displayed. When we click the convert button, the password input will also pop up. box, the PDF file can only be converted if the correct password is entered.
It can be seen from this that a file with a PDF opening password can be converted to PDF after entering the correct opening password, but a PDF file that cannot be entered with the correct password due to unknown password or forgotten password cannot be converted to PDF format.
The next step is to add the PDF file with restricted editing to the PDF converter
We can see the PDF converter, adding a PDF file with restricted editing, but it does not show a password. Click the convert button to convert the PDF file directly.
It can be seen that PDF files with restricted editing will not be restricted by passwords, and PDF files can be directly converted.
The above is only to test the function of PDF converter, and some PDF converters may not be able to directly convert PDF files with passwords.