CRD File Extension

TIP: Run a Free Scan for .CRD File Errors.

Files with the extension .CRD are known as "Microsoft Windows 3.x Cardfile".

This data format was added to our database by a visitor to this site, but no additional information was provided.

We have yet to investigate the CRD file extension any further, or there was simply not enough information available at the time to report accurately on the format. If you know how to open CRD files or even how to convert or edit them, please use the form below.

However, it is possible that other file formats exist which also use the CRD extension, so please let us know if you do not think the CRD extension matches the file format you are looking for.

How to Open .CRD (Microsoft Windows 3.x Cardfile) files

Windows

Windows 3.x

Additional extension information

File type:	Data
Popularity:	Not specified
Author:	Microsoft
MIME type:	Not specified

Other .CRD file extensions

Guitar Tablature File

Visitor comments

Bob Peffers

2009-07-08 05:40:36

.CRD files were the extension used by a great little program called, "Windows Cardfile". This was part of windows 3.1 but, if you can obtain a copy, it will run very well on XP and Vista.It is a personal information manager/database program and can even handle BMP files. It takes the form of a simple cardfile, (obviously), with an index and a card viewer. It is simple to use and one wonders just why MS ever dropped it from present versions of Windows

Harry Bee

2011-03-15 18:32:11

There are at least three versions of the .crd data file for Microsoft Cardfile that was originally distributed with, and automatically installed by Windows 3.1. (Some later Windows versions had it, but didn't install it automatically.)I have seen two of the formats, and they are substantially different from one another.The one signed MGC (first three bytes) seems to be a text-only format and is probably the earliest. (That is, the MGC files I've seen have cards with only text in them.)The one signed RRG has cards that can have both text and graphics. I'm assuming most users of MS Cardfile didn't even know you could put images into the cards; I didn't know until I started researching the format. The bitmapped images could be embedded (by dragging/dropping), OLE objects, or linked objects.Then there were at least two later formats:One of them, in a (hidden) version distributed with Windows XP uses 16-bit Unicode characters. Apparently this version was signed DOK.And I've seen references to still another 8-bit format, but haven't been able to verify that.The information I have on the 16-bit version comes from the Microsoft site, the only place I've found a full format map. http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B99340That map doesn't appear to be for the 16-bit version, however, and it's not for either the MGC or RRG versions I've seen and decoded. (Okay. Truth be told, I have not fully decoded the RRG version, but just enough to get the text out.).crd files from MS Cardfile can be read and used by AZZ Cardfile, that you can find easily, and I think can be imported by MS One Note (not verified).

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Microsoft Windows 3.x Cardfile