H1S file format description

Many people share .h1s files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .h1s file can be edited, converted or printed with. On this page, we try to provide assistance for handling .h1s files.

1 filename extension(s) found in our database.

.h1s - Microsoft Help Compiled Help Data

The H1S data files are related to Microsoft Windows Help. H1S file is a Microsoft Help Compiled Help Data. The Microsoft Windows Help seems to be no longer supported.

Application:

Microsoft Windows Help

Category:

Data files

Mime-type:

application/octet-stream

Magic:

- / -

Aliases:

Microsoft Help Compiled Help Data related extensions:

.wprp: Windows Performance Recorder Recording Profile
.p7r: PKCS #7 Certificate Request Response File
.p7b: PKCS #7 Certificate Data in Base 64 Format
.dbs: Microsoft SNA Server Database
.p7c: PKCS #7 Certificate Data
.bmk: Windows Help Bookmark

Naturally, other applications may also use the .h1s file extension. Even harmful programs can create .h1s files. Be especially cautious with .h1s files coming from an unknown source!

Can't open a .h1s 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.h1s

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 .h1s file extension is often given incorrectly!

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

hls, g1s, hws, h1q, h15, m1s, hs, h1w, h1c

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.hls: HTTP Live Streaming Video
.g1s: Casio fx-9860G Flash System Image
.hws: Hedgewars Saved Game
.h1c: Microsoft Help Collection Definition
.m1s: Mach3 Macro
.h1q: Microsoft Help Merged Query 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

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

https://datatypes.net/open-h1s-files

If you have useful information about the .h1s file format, then write to us!

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