These are used to indicate the headings of sections or sub-sections in document. Based on the desired size of the text, any of six obtainable levels (<H1> to <H6>) of headers can be utilized. Figure illustrates the usage and varying size of the rendered text based upon the tag used.

<HTML>

<HEAD>

<TITLE> HTML Header Tags</TITLE>

</HEAD>

<BODY>

<H1> Header 1</H1>

<H2> Header 2</H2>

<H3> Header 3</H3>

<H4> Header 4</H4>

<H5> Header 5</H5>

<H6> Header 6</H6>

</BODY>

</HTML>

Figure: Rendering of the Six Header Levels

There is neither predefined sequence for utilizing the different levels of the header tags nor any limitation on which one can be used. Therefore the user has the alternative of using any level of header tag anywhere in document. If you wished to center text on a page, employ the CENTER tag. The text which is written between <CENTER> and </CENTER> tag gets aligned in the center of the HTML page. As seen in given Figure, the maximum size of the text is displayed by using the <H1> tag. Therefore the size goes in decreasing order with the enhancing order of the level (that means From <H1> to <H6>).