What is an AXX File?

How to Open, Edit, & Convert AXX Files

Picture of the AXX file icon

A file with the AXX file extension is an AxCrypt Encrypted file. AxCrypt is a file encryption program that scrambles (encrypts) a file to the point that it's unusable without first being decrypted with a specific password/passphrase.

An AXX file can also be secured behind a key file, which is a file that acts as an additional password.

Note: The AXX file extension is awfully similar in spelling to AAX, which is used for Audible Enhanced Audiobook files.

If you're here for AAX files, you can open one with iTunes.

How To Open an AXX File

AXX files can be opened with Axantum Software's AxCrypt. Choose the AxDecrypt.exe file on the download page if you just need to decrypt an AXX file and don't want the entire file encryption program installed to your computer.

Note: The AXX file extension looks similar to the suffix appended to files of other formats, but that doesn't mean they can open with the same software. Some examples include AZZ (AZZ Cardfile Database), AX (DirectShow Filter), AXE (Annotated XML Example), AXD (ASP.NET Web Handler), AXT (Adobe Photoshop Extract), and AXA (Annodex Audio) files.

If you find that an application on your PC does try to open the AXX file but it's the wrong application or if you would rather have another installed program open AXX files, see my How To Change the Default Program for a Specific File Extension guide for making that change in Windows.

How To Convert an AXX File

An AXX file is used only with the AxCrypt software, and therefore cannot be converted to another format.

To convert a file that AxCrypt has already encrypted and stored as an AXX file requires that you first decrypt it using AxCrypt, after which you might be able to convert the file with a free file converter.

For example, if you decrypt an AXX file to get an MP4 file out of it, you can use a video converter like Freemake Video Converter to convert that resultant MP4, but you can't use it to convert the AXX file directly.

More Help With AXX Files

See Get More Help for information about contacting me on social networks or via email, posting on tech support forums, and more. Let me know what kinds of problems you're having with opening or using the AXX file and I'll see what I can do to help.