Find Program to Batch Decrypt PDF Files?

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Does anyone know of a tool that can batch decrypt pdf files? I encrypted the files before I added two pages to the end of each file...... I first need to decrypt all of the files. I do have the user and owner passwords, however, it takes forever to open each file, change security preferences, and then save each file. I have over 1000 files to decrypt. I have tried the encrypt/decrypt tools from pdf everywhere....and it crashes and slows my computer way down. Does anyone know of a different tool or process? Any help would be great appreciated.

Use A-PDF Password Security (free download here)

1. Launching the application: A-pdf Password Security
2. Select the option Batch PDF Documents Security and push the button Next > , a file list window will be opened.
3. You can add files or even Add Dir for add all of files in a directory in there. you also can remove or clear files in list.
4. After finished adding pdf files, you can click "try password" button, then A-pdf Password Security will try to open the pdf documents which have open password security by using password pool, password pool is a password list which saved common password that can be defined by user.
5. Push the button Next > , a Security Option Window will be opened. where set "Add Security" checkbox values to false.
6. Clicking "Save" or "Save as ..." button to add batch decrypt PDF files

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