Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .h1w

1 extension(s) and 0 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .h1w file?
  • Which program can create the .h1w file?
  • Where can you find a description of the .h1w format?
  • What can convert .h1w files to a different format?
  • Which MIME-type is associated with the .h1w extension?
Microsoft Help Merged Keyword Index .h1w file icon

Microsoft Help Merged Keyword Index

The H1W file is a Microsoft Help Merged Keyword Index. Microsoft Help is a system assistance program included with Microsoft Windows.
Detailed description not available
Category: Data files
Application: Microsoft Windows Help
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Windows Help File
Windows Help Project
Microsoft Help Collection Definition
Microsoft Help Topic Definition
Microsoft Help Keywords Index

Other types of files may also use the .h1w file extension. If you have helpful information about .h1w extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

Casio fx-9860G SDK Project
Bruker Aspect NMR Data
Microsoft Help Validator File
Microsoft Help Merged Query Index
Microsoft Help Compiled Help Data

The .h1w filename extension is often given incorrectly!

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

h1s (1), h1d (1), g1w (1), hlw (1), h1q (1), h1 (1), hw (1)

Can't open a .h1w file?

If you want to open a .h1w file on your computer, you just need to have the appropriate program installed. If the .h1w association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.h1w

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 from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2016/2019/2022, Windows 7, Windows 8, Windows 10, Windows 11, Linux, Mac OS X, macOS, iOS, Android