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Details of the .html file extension

The table below provides useful information about the .html file extension. It answers questions such as:

  • What is the .html file?
  • What program do I need to open a .html file?
  • How can the .html file be opened, edited or printed?
  • Where can I find the specifications for .html?
  • Which MIME-type is associated with the .html extension?
  • How can I convert .html files to another format?
  • What are other, similar filename extensions to .html?

We hope you find this page helpful and a valuable resource!

0 extension(s) and 1 alias(es) found in database

.htm file extension details

Hypertext Markup Language Document

Hypertext Markup Language Document .htm file icon
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.
Category: Document files
Application: Internet Explorer
Mime-type: text/html
Magic number: -
Magic string: -
Sample: -
HTM aliases:
HTM related links:
HTM related extensions:
Active Server Page

Extended HTML Template

PHP Script

Cascading Style Sheets

Compiled HTML Help

JSP Markup Language

Answer Wizard Index

Dreamweaver Web Template File

Microsoft Frontpage Theme Package

HTML Help Table of Contents

Other types of files may also use the .html file extension.

.html file converters

.html converters

The following softwares are capable of converting .html files to other formats:

Calibre, OpenOffice.org, Microsoft Office Word

For example, using the softwares above, a .html file can be converted into one of the following formats:

odt, rtf, txt, doc, docm, docx, htm, 123, 602, bmp, cbc, cbr, cbz, cgm, chm
.html file extension error

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:

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

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Hypertext Markup Language Document
HTL Source
Tapestry Markup Language Document
DB/TextWorks Thesaurus Maintenance Lock
Timed Text Markup Language Document
HostMonitor TestList Data
open .html file

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 cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .html file association, check the FAQ.

.html file extension

Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .html file extension, write to us!

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