.CRD File Extension

2 file types use the .crd file extension.

Guitar chord File

Developer Martin Leclerc and Mario Dorion
3.7  |  32 Votes

What is a CRD file?

A CRD file is a guitar tablature file that contains song lyrics with matching guitar chords and tabs. It is a plain text file saved in the chord (crd) format, which includes a title, comments, lyrics on separate lines, and chords inside brackets (e.g., [D]).

More Information

Screenshot of a .crd file in Apple TextEdit 1
CRD file open in Apple TextEdit 1

Martin Leclerc and Mario Dorion developed the crd format in conjunction with the "chord" tool in 1992. The tool could write lead sheets, which are songs with lyrics and chords, and it would save the lead sheets as CRD files.

Leclerc and Dorion eventually stopped developing the chord tool, and Johan Vromans replaced it with ChordPro in 2016. With the new app, the ChordPro format and .cho file replaced the chord format and .crd file. However, ChordPro still supports the chord format, but it is now considered a legacy format.

NOTE: While the crd format typically uses CRD files, it may also use the .chord, .chopro, and .pro file extensions.

How to open a CRD file

You can open a CRD file with wxchordpro (Windows) and ChordPro (macOS). To open a CRD file with ChordPro, select File → Open. When you open a CRD file with ChordPro, the app automatically converts it to the ChordPro (cho) format.

You can also open a CRD file with a text editor, such as Microsoft Notepad (Windows), Microsoft WordPad (Windows), or Apple TextEdit (macOS). To open a CRD file with Notepad, select File → Open....

How to convert a CRD file

ChordPro can convert CRD files to several formats. When you open a CRD file with ChordPro, the software automatically converts it to the ChordPro (cho) format. You can also convert a CRD file to the Portable Document Format (.PDF) with ChordPro.

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Programs that open CRD files

Included with OS
Included with OS
Chrome OS
Included with OS

Windows CardSpace File

Developer Microsoft
3.2  |  19 Votes

File created by Windows CardSpace, an application used to manage digital identities; contains personal or business information, such as names, addresses, and phone numbers; also contains a digital signature that identifies the individual or business.

More Information

Windows CardSpace cards enables users to have a "virtual ID" for safely signing onto websites. A single card can be used for accessing multiple websites. When sending a card to a website, personal information is not sent unless it is explicitly authorized by the user. Instead, only the digital signature is sent to identify the user.

CardSpace cards may be issued from a managed card provider, such as a business or organization. These cards are referred to as Managed Information Card files. Companies use these to authenticate and validate entities within the company.

CRD files are only usable by websites and other online entities that support Windows CardSpace cards.

NOTE: CRD files were also used by older versions of Windows, prior to Windows 95. These files are in a different format than modern CRD files, but can still be opened by the AZZ Cardfile program.

Programs that open or reference CRD files

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