Forum Discussion
Is it possible to crack PDF password?
I recently encountered a similar problem. I forgot the password of an important PDF file. I was really anxious. I tried many methods on the Internet, but none of them worked. Later, I found a tool called iSeePasword Dr.PDF, which is very easy to use. It only took 2 hours and it actually recovered my 6-digit password without affecting the file content.
I recommend it to you! I hope it can help you!
https://www.engadgot.com/how-to-recover-pdf-password
I did use command line tools to fix a PDF password issue before, using a tool called qspdf. This tool is open source and can be run on Linux, Mac, and Windows. It is quite straightforward to use it to unlock PDF files, and because it is processed locally, there is no need to worry about the privacy issues that may arise from uploading it to the Internet.
1. Install qspdf: First, you need to install qspdfon your computer. If you are using Mac or Linux, you can install it through a package manager such as Homebrew or apt. Windows users may need to download the installation package from the official website of qspdf.
2. Open the command line interface: After the installation is complete, open your command line interface, such as Command Prompt or PowerShell on Windows, or Terminal on Mac.
3. Run the unlock command: You can use the following command format to crack PDF file password:
4. If you don't know the password and want to try to remove it, you can omit the --password=your password part and qspdf will try to remove the protection of the file.
5. Check the output file: After the command is run, check whether the output PDF file can be opened normally and whether the content is intact.
The advantage of using qspdf is that the processing speed is fast and it is controlled on your computer, not involving a third party. But its disadvantage is that if the PDF encryption algorithm is particularly strong, qspdf may not be able to unlock it.