HTML Tutorial - W3Schools
At W3Schools you will find complete references about HTML elements, attributes, events, color names, entities, character-sets, URL encoding, language codes, HTTP messages, browser support, and more:
HTM File - What is an .htm file and how do I open it?
Mar 31, 2023 · Learn about .HTM files and view a list of programs that open them.
HTM File Format | .htm Extension - GeeksforGeeks
Jul 23, 2025 · The HTM file format is a web page file written in Hypertext Markup Language (HTML) and uses the .htm extension, which is an alternative to .html. Early operating systems restricted file …
What Is an HTM or HTML File? (And How to Open Them) - Lifewire
May 19, 2021 · An HTM or HTML file is a Hypertext Markup Language file. Any web browser will open and display HTM and HTML files.
HTML - Wikipedia
Hypertext Markup Language (HTML) is the standard markup language [a] for documents designed to be displayed in a web browser. It defines the content and structure of web content. It is often assisted by …
How to Open HTM Files: 8 Steps (with Pictures) - wikiHow
Feb 24, 2025 · HTM files are most commonly known as HTML files, which are the files that contain HTML. If you open an HTM file in a text editor like Notepad or TextEdit, you'll only see lines of text …
HTM File Format
What is an HTM file? Files with .htm extension represent Hypertext Markup Language for creating web pages for display in web browsers such as Google Chrome, Internet Explorer, Firefox and a number …
HTML: HyperText Markup Language | MDN
Dec 22, 2025 · HTML (HyperText Markup Language) is the most basic building block of the Web. It defines the meaning and structure of web content. Other technologies besides HTML are generally …
HTM vs. HTML: What's the Difference?
Feb 15, 2024 · HTM is often used in operating systems and environments where only three-letter file extensions are supported, like earlier versions of Windows. HTML, on the other hand, is the standard …
HTM file extension - What is an .HTM format, and how to open it?
How to open an .HTM file? 📌 .HTM file category is clearly recognizable and opened up by any modern web-browser. In order to open and edit the .HTM source, you can make use of a plain editor, either …