How to get rid of password-based security · Step 1: Open up your text editor and create a new text file. Do not overwrite the existing text file; ➙ Save the new text file to the desktop, so you do not overwrite it; ➙ Copy the new text file to the desktop under your “Documents” folder with the extension .pdf. · Find out the name of your PDF file and change it to “.pdf_encrypted”; ➙ Open up PDF.app ➙ Go to View and scroll down to the “Data Protection” section, where you'll see a password field; ➙ Under the “Passwords” tab, click the right arrow in the “Password” drop-down menu and select the password from the “Password Encryption” list; ➙ You'll have to update your system with the correct passcode; ➙ Click “OK”; ➙ When the password has been entered successfully, you may see a message such as the one shown below. To find out the value of the password you used, click “Save”; ➙ Close your text editor and run the PDF again with this new password; Do the same for the other passwords if they are found in the text file. · The password will be hidden; How to remove password protection from PDF on Mac · Step 1: Open up the encrypted PDF with Acrobat; ➙ Download PDF file from the Internet; ➙ Open PDF; ➙ Select “Preview” and enter the password; ➙ Go to Settings > Document Format > Encryption. Your PDF file will then start changing. · In the newly displayed page, you'll need to select this option and click on it to display a dialog window with additional security questions. 2.1 How to Remove Encryption in PDF on Windows Click “View” then find PDF Security. In the Security tab, click on the tab titled “password” and select “Clear”. How to Remove Security from PDF File on Mac OS X File > Open, then select “Open”. Select “Encrypt”, then in the Password box select “Confide” and click “OK”. How to Remove Encryption in PDF on Windows • Open a document or a folder. Go to “File” > “Open”. A tab will appear with many boxes and one will be titled “Cryptography” • Click on the drop-down labeled “Security.” Select “Password.