If you have forgotten the password to your PDF document, or if you need to access a password-protected PDF document that you don't have the password for, you can use a PDF password recovery tool to recover the password. There are many different PDF password recovery tools available, and they all work in different ways. Some of them are free, while others are paid. In this article, we will introduce you five PDF password recovery tools, both free and paid.1. PDF Password Recovery ToolPDF Password Recovery Tool is a free PDF password recovery software for Windows. It can help you recover passwords for PDF documents that are protected with a password. The software supports both 40-bit and 128-bit encryption. To use this software, you just need to drag and drop the PDF file into the software interface, and then click on the "Recover" button. The software will start recovering the password.2. PDF Password Cracker ProPDF Password Cracker Pro is another free PDF password recovery tool for Windows. It can help you recover passwords for PDF documents that are protected with a password. The software supports both 40-bit and 128-bit encryption. To use this software, you just need to drag and drop the PDF file into the software interface, and then click on the "Crack" button. The software will start recovering the password.3. PDF Password RecoveryPDF Password Recovery is a paid PDF password recovery tool. It can help you recover passwords for PDF documents that are protected with a password. The software supports both 40-bit and 128-bit encryption. To use this software, you just need to drag and drop the PDF file into the software interface, and then click on the "Recover" button. The software will start recovering the password.4. PDF Password CrackerPDF Password Cracker is another paid PDF password recovery tool. It can help you recover passwords for PDF documents that are protected with a password. The software supports both 40-bit and 128-bit encryption. To use this software, you just need to drag and drop the PDF file into the software interface, and then click on the "Crack" button. The software will start recovering the password.5. Kon-BootKon-Boot is a free PDF password recovery tool. It can help you recover passwords for PDF documents that are protected with a password. The software supports both 40-bit and 128-bit encryption. To use this software, you just need to drag and drop the PDF file into the software interface, and then click on the "Recover" button. The software will start recovering the password.