LS1 file extension. How to open and convert files with LS1 file suffix

An ls1 file extension is associated with the Microsoft Winhelp.

Detailed description

Software that open ls1 file

Add comment

LS1 file extension - Microsoft Winhelp source data

What is ls1 file? How to open ls1 files?

File type specification:

Source code and script file type

ls1 file icon:

The .ls1 file extension is related to the Microsoft Winhelp a Windows help files authorizing and editing application. The Winhelp file format is based on Rich Text Format (RTF). The ls1 file stores data sources.

WinHelp was removed in Windows Vista to discourage software developers from using the obsolete format and encourage use of newer help formats.

This ls1 file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

Updated: December 30, 2024

The default software associated to open ls1 file:

Microsoft Windows

Company or developer:
Microsoft Corporation

A family of operating systems developed by Microsoft Corp. The first Windows was released in 1985 as a GUI add-on to MS-DOS. Currently, the latest version is Microsoft Windows 11.

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .ls1 file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

List of recommended software applications associated to the .ls1 file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open ls1 file, edit ls1 file, convert ls1 file, view ls1 file, play ls1 file etc. (if exist software for corresponding action in File-Extensions.org's database).

Unspecified and all other actions for computer programs working with ls1 file - Microsoft Winhelp source data

Click on the software link for more information about Microsoft Windows. Microsoft Windows uses ls1 file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).

Microsoft Windows:

Microsoft Windows

Similar file types:

Popular topics:

Previous file extension
LRS file extension

File-Extensions.org > Source code and script file types

Next file extension
file extension LS3PROJ

Note: We try to keep all external and related links up-to-date, however we are not responsible for the content of any site linked, further links on sites linked, or any changes or updates to the the information found on these sites. File-Extensions.org provides links to third party sites only as a convenience and the inclusion of such links on our site does not imply File-Extensions.org's endorsement of either the site, the organization operating such site, or any products or services of that organization. A visit to any site or page from our web site via these links is done entirely at your own risk.

Legal notice: You may not, under any circumstances, resell or reproduce any information for commercial use without the express prior written consent of File-Extensions.org. Scripts to automatically harvest results are strictly prohibited due to performance reasons and will result in your IP being banned from this website.

Enter any file extension without dot (e.g. pdf)
Search for file extension details and associated application(s)

LS1 file extension