Which MIME types are related to file extension ".hsm"?

The .hsm file extension is associated with 1 MIME types:

application/octet-stream.

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

About .hsm Files

HSM files are HelpSmith Project files. They hold binary data used in creating help documentation.
The MIME type is application/octet-stream, a common designation for binary files.

They are not designed for manual editing with standard text editors.
Based on information from FilExt.com, HSM files play a key role in developing and managing structured help projects.

Relationship between file extension and MIME type

A file extension is a suffix at the end of a filename that indicates what type of file it is. File extensions help both users and operating systems identify what application should be used to open the file.

File extensions are typically separated from the filename by a period (dot) and consist of 2-4 characters, though they can be longer. For example, in the filename "document.pdf", ".pdf" is the file extension.

File extensions are closely related to MIME types, as they both serve to identify the format of a file. However, while MIME types are used primarily by web browsers and servers, file extensions are used by operating systems and applications.

Associated MIME types

application/octet-stream

FAQs

What is an .hsm file?

An .hsm file is a project file created by HelpSmith, a help authoring tool used to generate documentation. It stores the entire structure of a help project, including topics, images, templates, and settings used to compile final formats like CHM or PDF.

How do I open an HSM file?

You need to download and install Divcom Software HelpSmith to open and edit these files. Once installed, double-clicking the .hsm file will launch the application and load your help project.

Can I edit an HSM file in Notepad or a text editor?

No, .hsm files contain binary data and are not stored as plain text. Opening them in a text editor like Notepad will show unreadable characters. You must use the HelpSmith interface to modify the content safely.

How do I convert an HSM file to PDF or HTML?

You cannot convert the project file directly using a standard file converter. Instead, open the project in HelpSmith and use the Compile feature to generate the output in your desired format, such as HTML Help (.chm), Web Help, or PDF.

What is the MIME type for HSM files?

The standard MIME type for these files is application/octet-stream. Since they are proprietary binary files, this generic type tells web browsers and servers to treat the file as a binary download rather than trying to display it. You can learn more about this type at application/octet-stream.

Can I open HSM files on Mac or Linux?

HelpSmith is designed primarily for the Windows operating system. To open an .hsm file on macOS or Linux, you usually need to use a virtualization tool like Parallels Desktop or VirtualBox to run a Windows environment.

Why does my HSM file fail to open?

This error often occurs if the file is corrupted or if you are trying to open a newer project version in an older version of HelpSmith. Ensure you have the latest update of the software installed and that the file was not damaged during transfer.

General FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why can one extension have multiple MIME types?

Different programs and historical usage may assign various MIME identifiers to the same file format. Listing them together helps maintain compatibility across tools.