How to Batch Remove PDF Restrict?

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I need to edit 100 pdfs document that has been restrict password protected in the past. No one in the company knows what password would have been used. Is there a way to unprotect a pdf without the password (remove the restrict)?

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. Push the button Next > , a Security Option Window will be opened. where set "Add Security" checkbox values to false
5. Clicking "Save" or "Save as ..." button to add batch decrypt PDF files

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