Legacy Markup
XStandard can convert legacy (HTML 4) markup into XHTML Strict / 1.1 and even fix "bad" markup. For example, XStandard will convert this invalid markup:
<P>The <B><I>quick</B></I> brown fox jumped over the lazy dog.
... into the following:
<p>The <strong><em>quick</em></strong> brown fox jumped over the lazy dog.</p>
In the editor below, type in HTML 4 markup then press
on the toolbar to return to Edit mode. If the markup contains errors, press the "Fix" button when prompted.