Hello everyone, recently I encountered a problem: how to decrypt encrypted PDF files? I have been solving various formatting problems all afternoon, because I need to merge several PDF files, but one of the files is encrypted, so I can't operate it. I found a lot of strategies on the Internet, and finally summed up some feasible methods, combined with my own experience and the skills of predecessors, to share with you.
1. Convert PDF to Image
This is the first method that many people think of, which is to convert PDF files into pictures, and then combine them into a new PDF file. But if there are a lot of PDF files, there may be more than 10, or even 100, this method is really annoying.
2. Use decryption software
This method is more common, which is to use decryption software to unencrypt PDF files. There are many decryption software available, such as "Quick", etc., but some software requires payment. In addition, there is an Internet security tool in Duoyu Browser, which contains many decryption tools, you can try it.
