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Navigation: Home > H1S file

Informations about the H1S filename extension and the file formats associated with it

We collected the information you should know about the .h1s filename on this page. If you were sent a(n) .h1s file in an e-mail, but you don’t know what to do with it, then you can find help here. We strive to suggest free, open-source applications that are available to everyone for the file formats.

1 filename extension(s) are in our database

.h1s - Microsoft Help Compiled Help Data

The H1S file is a Data file, which is connected to the Microsoft Help Compiled Help Data according to our registry. With the adequate settings, the Microsoft Help Compiled Help Data (.h1s) files can be opened or converted with the help of Microsoft Windows Help.

Format description:
H1S format
Microsoft Windows Help
Magic string:
- / -
Related links:
Related extensions:
Windows Help Bookmark
Microsoft Help Collection Definition
Microsoft Help Validator File
Microsoft Help Merged Hierarchy File
Microsoft Help Keywords Index
Microsoft Help Merged Query Index

Important! Programs other than the ones listed above may also use the .h1s file extension. Even harmful programs can create files with the .h1s extension to store data in them. Always be careful with .h1s files coming from unknown sources. Don’t open executable files that arrived in mails, even if you know the sender.

The .h1s file can’t be opened on your computer?

If the program necessary for opening the .h1s file is installed properly on your computer, then the quickest and simplest way to open the .h1s file is to double-click on the file’s name. If that doesn’t work, then the right software probably isn’t installed on your computer.

While opening the .h1s file, you may receive an error message from the associated application, this can be caused by the following:

Incorrectly given .h1s extension

The .h1s filename extension can be given incorrectly sometimes. The cause of the error could be a mistake or a simple typo. We found the following incorrectly given filename extensions that are the most frequent in the case of .h1s files.

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

Maybe you’re not even looking for the .h1s file extension?

It’s possible the the file’s extension was given incorrectly. Below, we list some filename extensions that are similar to the .h1s extension. It’s possible that the one you’re looking for is among them.

Microsoft Help Collection Definition
Microsoft Help Merged Query Index
Microsoft Help Merged Keyword Index
Haskell Source
Hedgewars Saved Game
Mach3 Macro

Associated applications

The Windows operating system stores information about the applications associated to the file extensions in the registry database. The associations can be queried or modified in the Command Prompt window with the "assoc" command.

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We gladly accept application suggestions, but our primary goal is to suggest reliable, open-source applications that can be freely distributed to the users.

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