On 2013–02–19 Troy Henderson wrote:

> I would like to convert my ConTeXt document to both PDF and "plain" HTML.

My suggestion: Use markdown (or reST) with pandoc.

> I need plain HTML output (i.e., not XML or XHTML) because my institution's
> web based management software allows me to copy/paste plain HTML snippets
> but not XML or XHTML.

ConTeXt does output XML, not XHTML. You would need to do the
XML → XHTML conversion yourself.

> Is it possible for ConTeXt to output HTML so that the result looks
> as close to the PDF output as possible?

\startnitpicking
  HTML does not look like anything. It's a markup language that simply
  states that *this* element is a header and *that* element is a list,
  etc. How the HTML is rendered is mostly controlled by the CSS.
\stopnitpicking

Within the limits of CSS you obtain a quite close match¹. But it's
up to you to create the matching CSS.

Marco


¹ http://tex.stackexchange.com/a/55945/5245