HTML file format description

Many people share .html files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .html file can be edited, converted or printed with. On this page, we try to provide assistance for handling .html files.

1 filename extension(s) found in our database.

.htm - Hypertext Markup Language Document

The HTM document files are related to Mozilla Firefox. The HTM file is a Hypertext Markup Language Document. HyperText Markup Language (HTML) is a markup language designed for the creation of web pages with hypertext and other information to be displayed in a web browser.

Mozilla Firefox
Document files
- / -
ht3, ht5, html, html5
Hypertext Markup Language Document related extensions:
SolidWorks Sheet Template
Directory Services Markup Language Document
Autodesk Exchange File
Avery DesignPro for Mac Document
OmniGraffle Template
Delimiter-Separated Values

Naturally, other applications may also use the .html file extension. Even harmful programs can create .html files. Be especially cautious with .html files coming from an unknown source!

Can't open a .html file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


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

To avoid this error, you need to set the file association correctly.

The .html file extension is often given incorrectly!

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

hml, htl, htm, mtml, thml, tml, ttml

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

HostMonitor TestList Data
Thinkfree Office NEO XML Document
Tapestry Markup Language Document
Timed Text Markup Language Document
DB/TextWorks Thesaurus Maintenance Lock
Hypertext Markup Language Document

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .html file format, then write to us! >> HTML file