How can I open or unlock PDF without password if I forgot it

This is a great option if you are comfortable running a script. It's free, open-source, and doesn't have a fancy interface. Using a script like pdf_unlock.py can be a method to unlock PDF without password on a Windows PC, especially if you have legitimate access to the document. The script typically works by removing restrictions or password protection from the PDF file.

Here’s how you can use pdf_unlock.py to unlock PDF without password:

1. First, ensure you have Python installed on your Windows PC. If not, you can download and install it from the official Python website.

2. Download the pdf_unlock.py script from a trusted source or repository. Save it to a convenient location on your computer.

3. Open Command Prompt and navigate to the folder where you saved pdf_unlock.py. You can do this by typing cd path\to\your\folder and pressing Enter.

4. To unlock PDF without password, run the script with the filename of your protected PDF as an argument. The command might look like this:

python pdf_unlock.py protectedfile.pdf

5. The script will process the file and generate an unlocked version, often saved as a new PDF file in the same directory.

Please note, the effectiveness of this method depends on the type of protection used on the PDF. If the PDF has strong encryption or security measures, this method might not work. Also, ensure you have the right to unlock the PDF, as bypassing security without permission can be illegal.