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Rogerwop's avatar
Rogerwop
Iron Contributor
Jul 15, 2026

How to delete password from pdf on Windows as it is password protected?

I've got a password-protected PDF that I need to unlock so I can edit it, but every online tool I try either wants me to upload the file (which feels sketchy) or charges money after the first page—do...
Thatcherw's avatar
Thatcherw
Iron Contributor
Jul 15, 2026

PDFtk is an open-source command-line PDF tool that delivers a fast offline scriptable terminal solution for how to delete password from pdf via a single simple line command to quickly generate unlocked PDF copies without uploading files online.

How to Remove Password from PDF

1. Download and install the software toolkit from the official website, and configure the system environment variables so that the software commands can be recognized.

2. Move the password-protected PDF file to a separate, easily accessible folder.

3. Open the Command Prompt and change the working directory to the folder containing the target PDF file.

4. Enter the following decryption command, replacing YOUR_PASSWORD with the actual open password for the PDF file:

pdftk input.pdf input_pw YOUR_PASSWORD output output.pdf

5. Press Enter to execute the command. An unencrypted output.pdf file will be generated in the same folder.

Disadvantages

  • Operates entirely via the command line; there is no graphical user interface.
  • Requires manual installation and configuration of environment variable paths before use.
  • Cannot recover or bypass unknown PDF open passwords; the correct password must be entered.
  • No built-in PDF preview feature; file contents cannot be viewed before decryption.

This lightweight command-line tool runs quickly and can be used in conjunction with batch scripts, effectively streamlining repetitive tasks when you need to remove passwords from PDF files. Its main drawback is the lack of a graphical user interface, which can present a learning curve for users unfamiliar with terminal operations.

Note

  • Before executing the command, carefully check the spelling of the PDF filename and password to prevent execution failures.
  • If you plan to write a batch decryption script, store PDF files with different passwords in separate folders.
  • During the decryption process, please close other software that consumes a large amount of system resources to avoid slowing down the processing of large PDF files.