HTML Doctype Purpose and Importance


 In this short post we will be highlighting Purpose and Importance of html doctype. Few might know about the html doctype, but what about the importance of this?

Let us find, what html doctype is?


In HTML, there is a <!DOCTYPE html> declaration before the <html> tag on the HTML document which is of great importance. HTML <!DOCTYPE> is a tag used to inform the browser about the version and type of HTML used in the document. DOCTYPE is also known as DTD (Document Type Declaration).

DTD uses terse formal syntax; it declares which elements and references appear where in the document. Moreover, it also declares entities that may be used in instance document.

Importance of the HTML doctype

The code will not validate or render correctly without DOCTYPE, as this is the key component of standard compliant web pages.

  • It enforces the browser to make the actual specifications being made in the HTML document.
  • DTD prevents browser from switching to quirks mode.
  • It helps a user to identify the issues on the web applications workflows, DOCTYPE is supposed to be the first thing in an HTML document, before the tag.
  • It supports both HTM/XHTML DTD.


The <!DOCTYPE html> declaration must be placed at the beginning of every HTML document. It informs the browser about the document type.

When we use HTML or other markup language, we have to follow syntax for each tag and elements.

The basic syntax is:

<!DOCTYPE html>
        Code With Mind
        —Some Front End logic, codes, tags, elements—

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