HTML doctype declaration - W3Schools
All HTML documents must start with a <!DOCTYPE> declaration. The declaration is not an HTML tag. It is an "information" to the browser about what document type to expect. In HTML 5, the …
What is the meaning of DOCTYPE in HTML - GeeksforGeeks
Jul 23, 2025 · The HTML document type declaration or Doctype is an instruction used by web browsers to fetch what version of HTML the website is written in. It helps browsers in …
Document type declaration - Wikipedia
In XHTML documents, the doctype declaration must always explicitly specify a system identifier. In SGML-based documents like HTML, on the other hand, the appropriate system identifier …
What is DOCTYPE in HTML? Explained with Examples - Intellipaat
Oct 29, 2025 · A declaration of the kind <!DOCTYPE html> is placed at the start of your HTML document. It informs the web browser of the version of HTML that the page is written in.
HTML Doctype: Syntax, Usage, and Examples - mimo.org
The correct syntax for the HTML doctype declaration in modern web development is: This is the standardized doctype for HTML5. It’s simple, case-insensitive, and must be the very first line in …
Doctype - Glossary | MDN
Jul 11, 2025 · In HTML, the doctype is the required <!doctype html> preamble found at the top of all documents.
What is the DOCTYPE Declaration in HTML? An Essential Guide …
Jan 11, 2025 · The DOCTYPE must be the very first line of code in your HTML, before the <html> tag. It is considered best practice to always add the declaration in your pages for stability.
Syntax of HTML5 Doctype Declaration - Tutorial Republic
A Document Type Declaration, or DOCTYPE for short, is an instruction to the web browser about the version of markup language in which a web page is written. A DOCTYPE declaration …
HTML Document Type Declaration - W3Schools
HTML Doctype Declaration refers to a Document Type Definition (DTD). A DTD refers to an XML document format representing allowed elements in a web page. Every HTML document …
What is the DOCTYPE Declaration in HTML? - freeCodeCamp.org
Dec 29, 2019 · What is the DOCTYPE Declaration in HTML? The HTML document type declaration, also known as DOCTYPE, is the first line of code required in every HTML or …