A daily updated filename extension database!

HT3 file extension

The table below provides useful information about the .ht3 file extension. It answers questions such as:

  • What is the .ht3 file?
  • What program do I need to open a .ht3 file?
  • How can the .ht3 file be opened, edited or printed?
  • How can I convert .ht3 files to another format?

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

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

✅ Hypertext Markup Language Document

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: Mozilla Firefox
Mime-type: text/html
Magic number: -
Magic string: -
Sample: -
HTM aliases:
ht3, ht5, html, html5
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 .ht3 file extension.

🚫 The .ht3 file extension is often given incorrectly!

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

bt3, hg3, ht, hte, htr, htw, hy3, nt3, t3, ut3

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Haptek Compressed Archive
MomSoft Control Runner Button Configuration
Hy-Tek Meet Manager Results Data
Webhits Template
Harvard Graphics 3.0 Graphic
Hy-Tek Team Manager Data
HyperTerminal Settings
JB BAHN Layout Data
Humminbird Track Data
TADS 3 Compiled Game

🔴 Can't open a .ht3 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 .ht3 file association, check the FAQ.

🔴 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 .ht3 file extension, write to us!

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