>> H1D file

H1D file format description

Many people share .h1d files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .h1d file can be edited, converted or printed with. On this page, we try to provide assistance for handling .h1d files.

1 filename extension(s) found in our database.

.h1d - Microsoft Help Validator File

The H1D data files are related to Microsoft Windows Help. H1D file is a Microsoft Help Validator File. The Microsoft Windows Help seems to be no longer supported.

Microsoft Windows Help
Data files
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Microsoft Help Validator File 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 .h1d file extension. Even harmful programs can create .h1d files. Be especially cautious with .h1d files coming from an unknown source!

Can't open a .h1d 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 .h1d file extension is often given incorrectly!

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

hld, h1c, h1v, h1f, hwd, h1w, h1s

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Structural Desktop Hold Data
Microsoft Help Collection Definition
General Hard Disk Image
Microsoft Help Compiled Help Data
Microsoft Help VTopic Definition
Microsoft Help Merged Keyword Index

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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