Sign up ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

How can I add a new file type to my preview pane.

At this point I want to add the possibility to preview .cbr and .cbz files with my comic viewer.

But a general solution that would work with any file-type/application pair would be best.

I tried Winhelponline’s PreviewConfig Utility it does not allow me to match my file-types with a new application.

share|improve this question

1 Answer 1

I followed this blog article to add a text preview for a file type .meta I use and wanted to preview as text:

  1. Associate a default program with the file type
  2. Edit registry HKCR\[.extension], e.g. HKCR\.meta, adding a new String value named PerceivedType and set it to text, or whatever PerceviedType you want.

That works fine if your PerceivedType already exists. The available values are the subkeys of HKCR\SystemFileAssociations. Hopefully you can use one of the existing ones ... otherwise try following instructions here to add a new one:

Registering a Perceived Type

Registry values for perceived types are defined as subkeys of the HKEY_CLASSES_ROOT\SystemFileAssociations registry subkey. For example, the perceived type text is registered as follows:

                   (Default) = "%SystemRoot%\system32\NOTEPAD.EXE" "%1"
                   (Default) = "%SystemRoot%\system32\NOTEPAD.EXE" "%1" 

NB: This is the same for Windows 7 and Windows 8

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.