CDY file format description

Many people share .cdy files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .cdy file can be edited, converted or printed with. On this page, we try to provide assistance for handling .cdy files.

1 filename extension(s) found in our database.

.cdy - Cinderella Construction File

The CDY document files are related to Cinderella. The CDY file is a Cinderella Construction File. Cinderella is a proprietary interactive geometry software, written in Java programming language.

Document files
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Cinderella Construction File related extensions:
Intuit QuickBooks Backup File
Autodesk AutoCAD Compressed Drawing
PRO Landscape Planner Design
GradeStat Document
BBS Directory List
SmartDraw Template

Naturally, other applications may also use the .cdy file extension. Even harmful programs can create .cdy files. Be especially cautious with .cdy files coming from an unknown source!

Can't open a .cdy file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .cdy file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

cd, cdg, cdj, cdt, cdu, cry, csy, cwy, cy, cyd, dcy, ddy, sdy

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

CorelDraw Template
Starmoney Database File
ProWorx NXT Temporary Long Comment Data
CryENGINE Map Data
Stanford Microarray Database Clustered Data
DiscJuggler CD-Rom Data

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .cdy file format, then write to us! >> CDY file