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.
What a wiki file is? .html, I guess.
No, but they work best that way. You can use any extension you'd like to on an HTML file. You just need to be sure that the server is serving the file with the MIME type of "text/html."
You can use any text editor although I suggest Notepad++ which is a free download and save a HTML document as all file types with a .HTML extension
It uses tags.
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.
If you are creating a HTML file, use Notepad or another text editor, not a word processor. When you go to save it, save it with an extension of .htm or .html and set the "Save As Type" option to all files, to ensure a .txt extension is not also added.
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.
There is nothing like converting HTML file to a website. A file with .html extension and when run in a web browser will be same as a website. To use that or access that everywhere you need to buy a server first.
HTML - Hyper Text Markup Language is a computer programming language which can be used to create webpages/websites.
A file name is the main name given to a file, such as document.docx. The file extension, represented by the characters after the dot, indicates the type of file and helps the operating system identify which software to use to open the file. For example, in document.docx, ".docx" is the file extension indicating that it is a Microsoft Word document.
HTML is Hypertext Markup Language. It is used to design webpages. You cannot use HTML to control a printer.