Skip to content

Markdown to HTML Converter

Options

HTML output

Type markdown to begin

Estimates for educational purposes — not financial, medical, or legal advice. See terms.

You wrote your content in Markdown because Markdown is faster to type than HTML. But the destination — a CMS field, an email template, a Slack post, a forum that doesn’t support Markdown directly — needs HTML. This tool converts one to the other in your browser, with no upload, no service in the middle.

The conversion uses the marked library, the same one most Markdown previews on the web are built on. It’s fast, well-maintained, and produces clean HTML that survives copy-paste into almost any HTML-accepting system.

What gets converted

Standard Markdown:

  • Headings (# H1 through ###### H6)
  • Paragraphs, line breaks, hard breaks
  • Bold (**text**), italic (*text*), inline code (`code`)
  • Links ([text](url)) and images (![alt](src))
  • Ordered and unordered lists (with nesting)
  • Blockquotes (> quoted)
  • Fenced code blocks (```lang) and indented code blocks
  • Horizontal rules (---)

Plus GitHub-Flavored extensions (toggle off for strict CommonMark):

  • Tables with pipe syntax
  • Strikethrough (~~text~~)
  • Autolinks for bare URLs
  • Task list checkboxes (- [x] done)

Example: blog post draft to HTML email

You drafted a newsletter in Markdown — easy to write, easy to revise. The newsletter platform expects HTML. Paste the Markdown, click “Copy HTML”, paste into the platform’s HTML editor. Headings render as <h1>/<h2>, lists become <ul>/<li>, links inherit the email template’s styling.

Example: README to CMS

You maintain a README in Markdown and want to mirror it on a CMS-driven product page. The CMS wants raw HTML. Convert and paste — the structure carries over: code blocks, headings, anchor-friendly paragraphs.

What this tool does not do

It does not sanitise the output. If your markdown contains <script>...</script> or other HTML, it passes through verbatim. That’s correct behaviour for the converter (you might want raw HTML in your output) but means you must not use the result on a page that renders untrusted markdown without a separate sanitisation pass (DOMPurify, server-side sanitiser).

It does not preview the visual result — for that, use the live markdown preview, which renders the HTML in a sandboxed iframe.

It does not auto-detect the source language. If you paste HTML by mistake, you get HTML out (with marked making a best effort to interpret it as markdown — usually a mess). For HTML → Markdown, use the HTML to Markdown converter.

It does not handle Markdown extensions beyond GFM (footnotes, definition lists, math). Those require additional marked plugins not bundled here.

Frequently asked questions

What flavor of Markdown is supported?

GitHub-Flavored Markdown (GFM) by default — that's tables (using pipe syntax), strikethrough with ~~text~~, autolinks for bare URLs, and task list checkboxes. Toggle GFM off and you get strict CommonMark, which omits all of those. Most modern Markdown lives somewhere on the GFM spectrum, so leaving it on is the safe default.

Why does pasting raw HTML in my markdown leave it intact?

Markdown specs allow inline HTML to pass through unchanged — that's how you embed a video, an iframe, or any HTML construct that has no Markdown equivalent. The converter preserves your HTML as-is. If you need stripped output, run the result through the strip-HTML tool afterwards.

What does 'pretty-print HTML output' do?

marked emits compact HTML by default — paragraphs and list items run together on one line, no indentation. Pretty-print inserts newlines between block-level tags (p, h1-h6, ul, li, blockquote, pre, table, etc.) so the source is easier to read when you copy it. The rendered DOM is identical either way; this is purely for the copy-paste view.

Can I get the HTML rendered visually instead of as source code?

Yes — switch to the markdown preview tool, which renders the same conversion in a sandboxed iframe so you see the actual styled output. This converter is for when you need the HTML source code (for example, to paste into a CMS, an email template, or a static site generator).

Why does single-newline behaviour matter for my output?

Strict CommonMark treats a single newline as just whitespace within a paragraph. GitHub treats a single newline as a line break (renders as <br>). The 'single line breaks → <br>' option toggles between these behaviours. If your markdown looks too dense or too sparse in the output, this is usually why.