Markdown → HTML Converter (GFM)

Paste Markdown, click convert, copy clean HTML. Private by design—everything runs locally.

Text & Actions

0 chars · 0 words · 0 lines

HTML Output

Live Preview (sandboxed)

Tip: Ctrl/Cmd + K focuses the Markdown box. Ctrl/Cmd + Enter converts again.

What this Markdown → HTML converter supports

  • GitHub-flavored Markdown (GFM): headings, emphasis, links, images, blockquotes.
  • Lists: ordered and unordered, including nested lists.
  • Code: inline code and fenced code blocks (```lang).
  • Horizontal rules: --- *** ___

What this Markdown → HTML converter supports

  • GitHub-flavored Markdown (GFM): headings, emphasis, links, images, blockquotes.
  • Lists: ordered and unordered, including nested lists.
  • Code: inline code and fenced code blocks (```lang).
  • Horizontal rules: --- *** ___

How it works

All parsing runs locally in your browser using a Markdown parser. Paste Markdown on the left, click Convert, then use Copy HTML. No uploads; your text stays on your device.

Common uses

  • Turn README.md content into HTML for a docs site or blog.
  • Convert notes to HTML snippets for a CMS.
  • Generate clean, copy-pasteable HTML email sections (test rendering separately).

Privacy note

This tool is 100% client-side. We do not send or store your input or output.

FAQ

Does it support GitHub-flavored Markdown?

Yes — headings, lists, emphasis, links, images, blockquotes, and fenced code blocks.

Is HTML sanitized?

It outputs HTML from your Markdown. If you accept user content, sanitize on your server before rendering.

Can I convert HTML back to Markdown?

This page is Markdown → HTML only. Use a dedicated HTML → Markdown tool for the reverse.

Are there size limits?

Large inputs work, but extremely long documents may feel slower on low-power devices because conversion happens in your browser.

Why convert Markdown to HTML?

Markdown is great for writing, but many publishing systems, email templates, and CMS fields still expect plain HTML. A fast client-side Markdown → HTML converter lets you keep your private notes local, avoid copy/paste errors, and ship clean markup without relying on external servers. If you maintain a docs site or a README, this tool gives you predictable output that can be pasted into any editor with minimal cleanup.

Tips for cleaner output

  • Headings: Use a single # per level. Don’t skip from h1 to h4—it hurts accessibility.
  • Links & images: Always include descriptive alt text and human-readable link text.
  • Lists: Keep bullets consistent (- or *) and indent nested items by two spaces.
  • Code blocks: Fence with triple backticks and specify a language (e.g., ```js) for better highlighting downstream.
  • Line breaks: Use blank lines between paragraphs to avoid unintended merges.

Common copy-paste pitfalls

  • Smart quotes: Text pasted from word processors may include curly quotes—convert them to straight quotes for code.
  • Mixed tabs/spaces: Inconsistent indentation can break list nesting and code fences.
  • Raw HTML in Markdown: Some renderers allow it, others strip it—sanitize before publishing user content.

5 Fun Facts about Markdown & HTML

Markdown predates GitHub

John Gruber and Aaron Swartz released Markdown in 2004; GitHub’s “GFM” extensions arrived years later to add tables, task lists, and fenced code.

Origins

Line breaks are optional

Plain Markdown collapses single newlines; two spaces plus newline force a break. GFM adds “soft break = <br> if enabled” quirks.

Break rules

Code fences keep languages

That ```js hint isn’t just for highlighting—downstream tools can route language-specific linters or parsers based on it.

Language hint

HTML is still allowed

Most Markdown parsers pass raw HTML through untouched. Great for embeds, risky for user content—sanitise before shipping.

Sanitize

Em vs i, strong vs b

*em* maps to <em> and **strong** to <strong>; both carry semantic meaning beyond italics/bold for screen readers.

Semantics

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