>> H1C file

H1C file format description

Many people share .h1c files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .h1c file can be edited, converted or printed with. On this page, we try to provide assistance for handling .h1c files.

1 filename extension(s) found in our database.

.h1c - Microsoft Help Collection Definition

The H1C data files are related to Microsoft Windows Help. H1C file is a Microsoft Help Collection Definition. The Microsoft Windows Help seems to be no longer supported.

Microsoft Windows Help
Data files
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Microsoft Help Collection Definition related extensions:
Windows Performance Recorder Recording Profile
PKCS #7 Certificate Request Response File
PKCS #7 Certificate Data in Base 64 Format
Microsoft SNA Server Database
PKCS #7 Certificate Data
Windows Help Bookmark

Naturally, other applications may also use the .h1c file extension. Even harmful programs can create .h1c files. Be especially cautious with .h1c files coming from an unknown source!

Can't open a .h1c 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 .h1c file extension is often given incorrectly!

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

hc, h1d, t1c, hlc, h1v, h1f, m1c, h1s

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

High Resolution Continuous-tone TIFF Image
Microsoft Help Validator File
Microsoft Help Compiled Help Data
Microsoft Help VTopic Definition
ESO-MIDAS Help Command Data
Postscript Type1 Compressible Font

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

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