What is a .H1S File And How To Open It – Microsoft (Simple Steps)

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Have you downloaded a file with .h1s extension, but you have never seen this extension before? You most likely know what the file is, but you might be unsure on how to open it. That’s why we have made this article! You will learn how to open the .h1s file extension on various systems, what it is and how to work with it.

What is a .H1S file?

The file extension .H1S comes from Windows Assistance Platform Help File. This file extension was developed by Microsoft. This file belongs to the binary format and it is a system related files.

What to know

There is currently 1 software that can open the .h1s file on 1 platform.

How to open a .H1S file?

Below you can find an easy to understand, step-by-step guide to open the .H1S file on your operating system/device.

How to open a .H1S file on Windows (7, 8, 10)

The .h1s file can be opened in 4 steps on Windows.

1. The first step is to download the Help-Info xHelpMarkup software. This software will be used for opening the file. The other software that you can use is Help-Info xHelpMarkup.

Step 2

Step 2: Locating your .H1S file

2. In the second step you need to locate the downloaded file. If you don’t remember where you have downloaded your file to, you should check your /download/ folder as it usually gets automatically saved there.

Step 3

Step 3: Choose “Open with”

3. In the third step, after locating your file, right click on it and click “Open with”.

Step 4

Step 4: Choose the software and click ok

4. After choosing the “Open with” option, you will have an option to choose the Help-Info xHelpMarkup software you have downloaded. Choose your software and click on “OK”. Congratulations! You have opened your file on Windows.

Still cannot open the .H1S file?

If you cannot open the .H1S file, it is entirely possible that you are trying to open the wrong file. There are many similar file extensions that look like the .H1S file.h261 – International Telegraph Union, .h262 – International Telegraph Union and MPEG, .h263 – International Telegraph Union, .h264 – H.264 Encoded Video File, .h265 – JCT-VC. You might be trying to open one of them. Please recheck the file extension again.


In this article you have learned how to open the .H1S file with the Help-Info xHelpMarkup program on Windows.