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PDF Processing

Remove PDF Password Protection​

import PyPDF2

def remove_pdf_password(input_pdf_path, output_pdf_path, password):
    with open(input_pdf_path, "rb") as pdf_file:
        reader = PyPDF2.PdfReader(pdf_file)
        if reader.is_encrypted:
            reader.decrypt(password)
            writer = PyPDF2.PdfWriter()
            for page_num in range(len(reader.pages)):
                writer.add_page(reader.pages[page_num])
            with open(output_pdf_path, "wb") as output_pdf_file:
                writer.write(output_pdf_file)
            print(f"Password-free PDF saved at: {output_pdf_path}")
        else:
            print("The PDF file is not password protected.")

input_pdf = "input.docs.pdf"
output_pdf = "output.docs.pdf"
password = "secret_password"

remove_pdf_password(input_pdf, output_pdf, password)

Explanation​

This Python script removes the password protection from a PDF file and saves the unprotected version. Below is a detailed breakdown of the functionality:

  • PyPDF2: The library used to manipulate PDF files in Python.
  • remove_pdf_password(input_pdf_path, output_pdf_path, password): This function takes three parameters:
  • input_pdf_path: The file path of the password-protected PDF.
  • output_pdf_path: The file path where the unprotected PDF will be saved.
  • password: The password required to unlock the PDF.
  • reader.is_encrypted: Checks whether the PDF file is password protected.
  • reader.decrypt(password): Decrypts the PDF using the provided password.
  • writer.add_page(reader.pages[page_num]): Adds each page of the original PDF to a new PDF document.
  • writer.write(output_pdf_file): Writes the unprotected PDF to the specified output file.