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Enter a file name and location for your new pdf file when prompted. Protect your pdf file with permissions using adobe acrobat xi restrict the way people can use your pdf file. Select whether you want to restrict editing with a password or encrypt the file with a certificate or password. How to lock a pdf file without any software youtube. Due to the printing process, the resulting pdf wont have selectable text. Modify your pdf further, or click download file to save the unlocked pdf. Have a pdf file with password protection that is no longer needed. Confirm that you have the right to the file and click unlock pdf. With adobe acrobat dc on your desktop, you can easily unlock your file by removing the password. Unlock pdf remove pdf password security, giving you the freedom to use your pdfs as you want. If you want to copy text from a pdf file to add to a word document, paste a formula onto an excel spreadsheet, or insert into powerpoint slides for a presentation, it can be. To apply 256bit aes encryption to documents created in acrobat 8 and 9, select acrobat x and later.