There are two kinds of passwords for PDF files - open password and edit password, where the open password refers to opening the PDF document and immediately popping up the window to enter the password (password needs to be provided), and the editing password means that the PDF itself can be opened normally, but it restricts the functions of copying, printing, editing, etc.
If your PDF document is protected by password restrictions, it will ask you to enter your password immediately when you open the file in order to open the file. At present, the only way to do this is to try to see if the password is correct one by one. The encryption method of PDF is AES encryption, and there is no way to delete the password or bypass the password to open the file in versions higher than Acrobat 4.0. The files on the mainstream market are higher than this version.
If your PDF document is protected by password restrictions, you may not be able to copy, print, edit, etc., which requires decryption to remove the restrictions.
PDF restricts editing passwords
PDF restricts editing passwords
In order to greatly improve the decryption ability, recover the password or remove the password in a short time, this site uses a cloud computing cluster, you can upload files on this site, and quickly try to decrypt. With the help of this site cluster, you only need one step, you can launch large-scale cloud computing, using the current international advanced password recovery technology, supporting a variety of recovery methods, and quickly solving the trouble of forgetting passwords.