HTM extension files are executed in a web browser, which interprets the HTML code contained within the file to render web pages. These files can be opened directly by double-clicking them or through a web server for online access. When served from a web server, they can be accessed via a URL, allowing users to view the content over the internet.
.htm and .html
There is great difference between .htm and .html extensions. Everyone think there is no difference but something is hide here. Acutally I don't know more but one thing is ....Using DOS we can't give more than 3 letter/character extension and when we execute the file from DOS we can't execute the file if it's extension contains more than 3 characters. So we use .htm in earlier time. But nowadays all systems support .html extension. In preferred to use .htm extension not .html because .htm is supported either old systems and modern systems. Dr.Nach
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HTTP is not a file, it is a protocol. It therefore does not have an extension. If you mean HTML files, which are web pages, then either htm or html can be used as extensions.
The extension htm or html can be used for HTML files. Some computer systems only support 3 letter extensions, which is why some people only use htm for the extension. For the file itself it does not make any real difference. It is still a HTML document and will work on the internet. Browsers will open it whether it has a htm or a html extension.
The extension is the part of the filename after the dot that specifies the type of file (.txt for text files, .exe for executable files, .htm for hypertext markup language files, etc.).
The extension for web pages are usually either .htm or it also can be .html as well
.html or .htm
HTML files must end with the .html or .htm file extension. This convention helps web browsers recognize and render the file as a web page. Using either extension allows for proper identification and processing of the content as HTML by web servers and clients.
The shell will only execute files that end in a file extension of .exe, .bat, or .com
Typically, to execute files through the command line, you would first type the name of the application you want to execute the file with, followed by a space, then the path to the file. If administrator privileges are required to open the file, then you would put "sudo" before all that, hit Enter, and enter the administrator password.
The original extension of a HTML page was .htm because of file name restrictions that limited filetype extensions to 3 characters, today you can use 3 or 4 so either .html or .htm is perfectly fine.