Encryption is a technique by which you can hide the detail of any pdf file due to high-security purposes by using the password. After encryption and decryption, only the sender and receiver are known about the information so this technique is widely used. If you have a pdf and want to secure others encrypt them by using the password then the receiver can decrypt them and all the information is not stolen. Simply Encrypt your PDF with our easy to use tool! Upload your pdf and enter the password you want. Download the encrypted PDF.