Normally it's either .html or .htm. But because a good hunk of the internet uses Linux, and Linux doesn't require file extensions in the way that Windows does, you could theoretically use an extension, so long as you told the webserver to deliver that extension as HTML.
Where is the HTML file on you blog?
You can save your HTML file from the browser as an Archived HTML file, but the best way to send a HTML file and its folders is to zip it.
When you save an HTML file, the contents of that file are written on the hard drive. This has the effect of changing the contents of the file. When you read and HTML file, the file remains unchanged on the disk.
When you go to save your file, type in your desired file name, then type ".html" on the end. This tells Notepad that you want to save your document as an HTML file.
Web can be created by creating a .html file. Inside the HTML file, you can put the tags of HTML.
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.
open HTML file, delete "code", save file
Yes you need to put the file in the same directory. This will get the file to be executed from the HTML file.
a website file
go to file menu--> select option "save as" --> then choose the file type "html document" name the file. and you are done
.html or .htm
Tested on Aptana 3.0.4: File/New from template/HTML/<html version>