What are Windows Help Files?

Microsoft WinHelp Files, or Windows Help Files, were used by Microsoft's Windows operating system as a proprietary format for displaying online help files. First introduced in 1990 with Windows 3.0, a WinHelp file could be displayed using the Microsoft Help browser.

This file format was deprecated in Windows Vista in favor of better formats such as the Microsoft Compiled HTML Help format (CHM), which provides many advantages over “.HLP” files. In response to user requests, Microsoft released the Microsoft Help browser program as a downloadable utility a few years later, allowing users to continue opening WinHelp files in succeeding operating system versions.

Popular Windows Help File Extensions


Windows Help File Types

File Database Breakdown - Windows Help File Extensions


Top Windows Help File Extensions

File Extension Total Number of Files Oldest File (Date) Latest File (Date)
MSHI 20 resources.mshi
(07/26/2012)
art.mshi
(03/18/2017)
H1H 2 Help_MTOC_help.H1H
(04/11/2009)
Help_MTOC_help.H1H
(04/12/2011)
HXH 2 Hx_1033_MTOC_Hx.HxH
(05/10/2017)
Hx_1033_MTOC_Hx.HxH
(05/10/2017)
H1S 239 resources.H1S
(11/02/2006)
browser.h1s
(04/12/2011)
HXT 84 Hx.HxT
(05/10/2017)
WINWORD_COL.HXT
(05/10/2017)
CHQ 2 cpanel.chq
(04/14/2008)
cpanel.chq
(04/14/2008)
MSHC 20 resources.mshc
(07/26/2012)
art.mshc
(03/18/2017)
H1K 16 Windows_BestBet.H1K
(11/02/2006)
Help_AssetId.H1K
(04/12/2011)
H1D 4 Help_CValidator.H1D
(04/11/2009)
Help_MValidator.H1D
(04/12/2011)
HXD 2 Hx_1033_MValidator.HxD
(05/10/2017)
Hx_1033_MValidator.HxD
(05/10/2017)
H1C 4 Help.h1c
(11/02/2006)
Help.h1c
(04/12/2011)
HLP 248 CN200.HLP
(09/18/2006)
UNIDRV.HLP
(05/10/2017)
HXC 85 Hx.HxC
(05/10/2017)
WINWORD.DEV_COL.HXC
(05/10/2017)
H1T 4 Help.H1T
(11/02/2006)
Windows.H1T
(04/12/2011)
HXK 168 NamedURLs.HxK
(05/10/2017)
SETLANG_K_COL.HXK
(05/10/2017)
H1W 6 Help_MKWD_SubjectTerm.H1W
(04/11/2009)
Help_MKWD_BestBet.H1W
(04/12/2011)
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