In an encrypted document a password hash, not a password itself, is stored. Thus, even if a right password has been entered, you may not be able to open a PDF doc.ģ. Recover PDF Password will decrypt this password as “2a`c”. Adobe Reader on Mac OS will accept both of these passwords, while on Windows OS it will accept only “2a`c”. If one enters password “²àç” on Mac OS, it will be transformed into “2a`c “. Therefore, Adobe Reader won’t accept such a password. But when entering this password on Mac OS, it will be transformed into “2a`c”, thus changing not only the encrypting, but also the password length. For example, one can enter password “²àç” on Windows OS and Recover PDF Password will decrypt it on Mac OS. Also note that Acrobat Reader Pro transforms passwords differently on Windows and Mac OS. For example, these two passwords are absolutely the same: When encoding a PDF file, information about localization, in which a password has been entered, is lost. All the passwords are saved to History tab for your convenience.ġ.Now you can decrypt a file – save it without passwords and usage limitations.Note that you can pause the recovering process at any time by clicking the corresponding button and continue it later. When all the options are selected, all you have to do is click “ Start recovery” button and wait.ĭuring the decryption procedure you’ll be able to see overall decryption progress, elapsed and estimated time, etc.User-defined symbols – enter symbols that are most likely to have been used in the password Include space – enables “space” character Include special symbols – all special symbols digits – (0-9): 012345679 Include uppercase Latin letters – all Latin caps will be used : ABCDEFGHIJKLMNOPQRSTUVWXYZ Include lowercase Latin letters – all small Latin: abcdefghjiklmnopqrstuvwxyz Both Owner and User passwords can be searched for.That method gives 100% success but may take maximum time. Recover PDF Password tries all possible encryption keys until finds the right one, and allows decrypting the file using that key – the resulting PDF file will have no security at all. This option is recommended if your file uses 128-bit encryption. Then only these symbols will be changed during password search, all other symbols will be left unchanged.Įxhaustive search – if the PDF file has both User and Owner passwords, and they are long and complex, you should try this feature. For example, “?” is the symbol in “123?avc” template. Symbol – the symbol, used in template to substitute other symbols of search. For example, you know that the password contains 8 characters, starts with “x”, and ends with “99”. If the minimum and maximum lengths are not the same, the program tries shorter passwords first.īy template – if you already know some symbols or characters in the password, you can specify the template to decrease the total number of passwords to be verified. Usually, you can test all short passwords in just a few minutes but for longer passwords, you have to be patient and/or have some knowledge about the password (including the character set which has been used, or even better – the template).The minimum length cannot be set bigger than the maximum length, of course. Now, choose the recovery method: By password length – this is one of the most important options affecting checking time.Select protected PDF file by clicking button and locating the file.After you launched Recover PDF Password, you will see its main window:
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