COL file format description

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

1 filename extension(s) found in our database.

.col - HTML Help Collection

The COL document files are related to HTML Help Workshop. COL file is a HTML Help Collection. Html Help v1.x supports creating libraries, called "collections", of multiple (read: "hundreds") individual CHM help files.

Application:

HTML Help Workshop

Category:

Document files

Mime-type:

application/octet-stream

Magic:

- / -

Aliases:

HTML Help Collection related extensions:

.obt: Microsoft Office Binder Template
.obo: OBO-Edit Document
.fdw: FEBDOK Document
.vrd: Microsoft Visio Report Definition
.xlw: Microsoft Excel Workbook Document
.twdx: MindMapper 12 XML Map

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

Can't open a .col 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:

example.col

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.

Open Control Panel > Control Panel Home > Default Programs > Set Associations.
Select a file type in the list and click Change Program.

The .col file extension is often given incorrectly!

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

ol, ocl, ckl, cpl, xol, cil, sol, dol, cop, com, co, cll, vol, fol, coo

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.ol: Valve Hammer Object Layout
.ol: PTC Creo Model File
.cpl: Control Panel Item
.ckl: DISA STIG Checklist
.cpl: Corel Colour Palette
.ocl: Object Constraint Language File

Operating systems

DataTypes.net currently supports the following operating systems:

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

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

https://datatypes.net/open-col-files

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

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