What is .htm?

.htm is a filename extension for a webpage written in <a href="https://www.wikiwhat.page/kavramlar/Hypertext%20Markup%20Language">Hypertext Markup Language (HTML)</a>. It's essentially the same as a file with the .html extension. The difference is primarily historical and related to operating system limitations.

• Origin: In early operating systems like DOS, filenames were limited to an 8-character name and a 3-character extension. .htm allowed for web pages to be saved and served on these systems.

• Functionality: Functionally, a .htm file and a .html file are identical. Web browsers interpret the content in the same way, parsing the HTML code to display the webpage.

• Modern Usage: While less common now, .htm is still a valid extension for HTML files. Some older systems or specific configurations might still require or prefer it. You may also encounter it in legacy websites or when dealing with older web development practices.

• Interchangeability: You can typically rename a .htm file to .html and vice versa without affecting its functionality, assuming your web server and other relevant systems are configured to recognize both extensions.