What is the doctype for HTML5?

The document type declaration - DOCTYPE is associates XML or Standard Markup Languages e.g. HTML with a DTC (document type definition)


As you can see the syntax, the DOCTYPE for HTML5 is rather the most shortest declaration compared to HTML4 or other XHTML declarations due to lack of references to a DTD like we usually have a DTD URL as an attribute.

⚡️ Note: HTML5 doctype is case-insensitive! so <!doctype html> is very well valid.

What is the advantage of using HTML5 doctype?

HTML5 is the 5th version of HTML standard, you get a lot of new features with it such as - rich media support, Forms 2.0, Canvas, Audio and Video Support, Geo Location, Micro Data and much more.

<!DOCTYPE html>
<title>HTML5 Doctype example!</title>



To validate your webpage is following HTML5 syntax and doctype correctly you can use https://validator.w3.org/ w3c Markup validator tool!

1)What is the HTML5 Doctype? <!DOCTYPE html>
2)Is HTML5 Doctype mandatory? Yes
3)Is HTML5 Doctype case-sensitive? No
4)HTML5 doctype lang? You can use it in html tag example: <html lang="en-US">
5)HTML5 utf-8 encoding meta character set tag? <meta charset="utf-8">
6)How to validate HTML5 code? visit: https://validator.w3.org/
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