Forums Help & support Cannot open my AxCrypt file

This topic contains 3 replies, has 2 voices, and was last updated by  Prabhukumar R 23 hours, 36 minutes ago.

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  • #14413 Reply

    Renato Ong

    Please help!

    It says:

    ‘Filename’ is not AxCrypt file

    Exception during processing of ‘filename’. [no magic Guid was found.-No magic Guid was found. (knownKeyChange)

    Your help is greatly appreciated.

    Thank you very much.


    #14420 Reply

    Prabhukumar R

    Hello Renato,

    The error message indicates that the file simply is not an AxCrypt fileit checks the first 16 bytes for a unique value.

    Most often, this error occurs because the file is not produced by AxCrypt. It can also happen when users mistakenly rename non-AxCrypt files to end with .axx, in which case renaming back to its appropriate extension will fix the issue since the file was never encrypted in the first place in this scenario.

    Another scenario is that it is left-over after previous decryption was interrupted at the stage where the original is overwritten. The most common reason for this happening is that the file was damaged because of the early removal of a USB drive, or a disconnected network drive.

    If the file is actually damaged to this extent, no, it can’t be fixed. The data is just not there to decrypt it.

    I am sorry to say, If the recovered encrypted file is corrupted then AxCrypt will not able to decrypt the same.

    But we have a feature called Try Broken File. You can able to decrypt the corrupted AxCrypt encrypted files by navigating the menu File | Options | enable Debug from the AxCrypt app.

    Now you can able to see the Debug the menu in the AxCrypt app. From the debug menu you have to select Try Broken File.

    Now you will be prompted for file selection. Select the corrupted encrypted file and then AxCrypt will try to decrypt the file. If successfully decrypted, then you can able to see the decrypted file in the location. Otherwise, AxCrypt can’t able to decrypt.

    still, you are facing any issue, please provide more information about the issue and write a mail to

    #17949 Reply


    Hi, I have a similar problem like Renato, I get the message “‘Filename’ is not AxCrypt file”, although I am sure it is because I encrypted it myself with AxCrypt. The problem started after I copied all files from one computer to another through usb key. I would hate to lose all those files as the original computer is now gone. Can you help?

    #17950 Reply

    Prabhukumar R

    Hello Peter,

    Please avoid sending the same query in different mediums. You may get a duplicate response

    We are already explained in this link. Please read this link:

    Please try to do the same.

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