litewriter

A (not so) lightweight Markdown editor.

Focuses on allowing exports to various formats and theming capabilities.

Currently supports exporting to HTML, PDF, and OpenDocument Text (ODT). Also plans to support DOCX in the future.

Performance

HTML and PDF exporters are pretty fast. Both uses the Marked library to convert Markdown to HTML and the PDF converter uses the browser's print dialog to save as PDF.

However, the ODT converter requires a lot of verbose template XMLs, so it may be slower than others, still, it won't slow the entire page down as it's lazily loaded.

ODT Converter

The ODT converter is based on XML content generated from LibreOffice and ONLYOFFICE. Though, It is most compatible with LibreOffice.

There's also one known limitation, Block quotes can't be used at the moment.