.H1S File

.h1s is Windows Assistance Platform Help File

Key Features: .H1S File Extension

Features Description
File Extension .h1s
Format Binary
Created by Microsoft
Category System

What's on this Page

  1. How to open:
  2. How to convert:

What is an .H1S file?

File extension h1s is associated with Microsoft Windows Assistance Platform. The Assistance Platform client (HelpPane.exe) is a new Help engine designed for Windows Vista.

It is not compatible with any previous versions of Windows. The Assistance Platform client is required to display Help files with the h1s file name extension.

In Windows Vista, the Assistance Platform client can be customized by OEMs, system builders, and enterprise customers under license agreement, but cannot be used by third-party programs.

The h1s files are binary files, which contain the help content. They are similar to MS Help 2.x hxs files.

Files with h1s extension are in most cases  related to Microsoft Windows Assistance Platform help engine. An h1s file stores help document.

How to open:

Use Assistance Platform to open *.h1s files.

How to convert:

Use Assistance Platform to transform *.h1s files to other help formats.
Windows Assistance Platform Help File - File openers


  1. Microsoft Assistance Platform
  2. Help-Info xHelpMarkup




How to solve problems with H1S files