Markdown to HTML

What is Markdown to HTML?

A Markdown to HTML converter renders Markdown source text into HTML markup. Markdown is a lightweight markup language designed for readable plain-text authoring — headings, bold, italic, lists, links, code blocks, and blockquotes use simple punctuation. The converter produces the equivalent HTML elements so the content can be displayed in a browser, embedded in a CMS, or served by a static site generator.

How It Works

The tool parses the Markdown source using a spec-compliant parser (CommonMark or GFM). Block-level constructs (headings, paragraphs, lists, code fences, blockquotes) are recognized first, then inline constructs (emphasis, links, images, inline code) are processed within. The resulting HTML is sanitized to strip dangerous tags and attributes (e.g., raw script tags) before display. All parsing runs in the browser; no server round-trip occurs.

Common Use Cases

• Previewing README content — render Markdown locally before pushing to GitHub or a docs site
• Converting blog drafts — turn Markdown posts into HTML for a CMS that expects HTML input
• Authoring documentation — write in readable Markdown, then export HTML for publishing
• Generating email or page fragments — produce clean HTML from Markdown source for embedding

Technical Details

Spec: CommonMark with GitHub Flavored Markdown (GFM) extensions — tables, task lists, strikethrough, autolinks. Output is sanitized to prevent XSS (script, on* attributes removed). Code blocks are rendered with <pre><code>; fenced blocks can carry a language class for syntax highlighting. The parser runs client-side with O(n) complexity. Raw HTML in the source is escaped by default.