Markdown is a plain-text shorthand designed to make writing structured documents faster. Compiling it to HTML means tokenizing syntax markers — asterisks, hash symbols, backticks, pipes — and mapping each to a standard HTML5 element: `<h1>` through `<h6>` for headings, `<p>` for paragraphs, `<table>`/`<thead>`/`<tbody>` for GFM tables, `<code>`/`<pre>` for code blocks, and `<ul>`/`<ol>`/`<li>` for lists. This converter follows strict CommonMark and GitHub Flavored Markdown (GFM) specifications, so the output is valid, accessible markup — not a loose approximation with broken nesting.

Most web-based markdown converters quietly upload your file to a backend server to run Pandoc or a Python script before sending the result back. That's a real exposure risk when you're converting proprietary system designs, unreleased product docs, or client work. This tool processes everything locally inside your browser's JavaScript runtime using native HTML5 DOM APIs — no network request carries your content anywhere, and nothing is logged or cached server-side.

Building a standalone landing page or documentation site? Choose 'Full HTML5 Document' — it wraps your content in `<!DOCTYPE html>`, `<html>`, `<head>`, viewport meta tags, and embedded CSS, ready to deploy as-is. Pasting into an existing WordPress post, Notion page, or React component instead? Choose 'HTML Snippet (Body Only)' for clean markup with no wrapper tags, so you avoid CSS conflicts and double-styling issues when it lands inside an existing layout.

Vanilla Markdown has no native table syntax, but GitHub Flavored Markdown fills that gap with pipe-delimited rows (`| header |`) and alignment markers (`:---`, `:---:`, `---:`). This converter fully parses GFM alignment rules into accessible, responsive `<table>` markup. Fenced code blocks tagged with a language (```` ```typescript ````) get proper syntax highlighting applied automatically, so technical documentation reads correctly the moment it's published — not after manual cleanup.