MarkdownPad is a free Markdown editor for Windows that that can convert Text to HTML or XHTML for you easily. Dwnload the free version here.

The Text to HTML Converter is a web-based tool that allows users to effortlessly convert formatted text into clean HTML code. Utilizing the powerful CodeMirror editor, it offers a user-friendly ...

It may not be exactly what you are looking for, but I use this service to convert my blog entries from text to html.<BR><BR>It allows you to use a convinient shorthand, such as _italics_, *bold ...

Markdown to HTML Conversion: Easily convert Markdown text into HTML format. URL Slug Generator: Generate SEO-friendly URL slugs by entering titles or keywords. Markdown Syntax Cheatsheet: Reference ...

Converting Google Docs documents to HTML is easy. You can export documents as HTML, or use Docs to Markdown add-on from the Store to get the job done.