Markdown ⇄ HTML Converter
Processed Client SideConvert Markdown to HTML and HTML back to Markdown, in either direction.
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About Markdown ⇄ HTML Converter
This tool runs entirely in your browser. Whatever you paste is processed on your own device and is never uploaded, logged, or sent to any server.
Convert Markdown into HTML and HTML back into Markdown, in whichever direction you need. Markdown to HTML is the common case — you have written content in Markdown and something downstream, a CMS or an email template, only accepts markup. The reverse is just as useful when you are migrating content out of an HTML-based system into a repository or a static site generator, where Markdown is far easier to maintain and to review in a diff. GitHub Flavored Markdown is supported, so tables, fenced code blocks, task lists, and strikethrough all survive the conversion in both directions. Line breaks are treated the way GitHub treats them rather than the way the original 1978 spec did, so a single newline inside a paragraph becomes a real break instead of being silently collapsed.
Key features
- Bidirectional conversion, with a swap button that flips the direction and reuses the output
- GitHub Flavored Markdown — tables, fenced code blocks, task lists, strikethrough, and autolinks
- Markdown to HTML produces clean semantic markup, not wrapper-laden output
- HTML to Markdown converts headings, lists, links, emphasis, code, and blockquotes back to source
- Syntax-highlighted panes appropriate to each format
- Live conversion with one-click copy of the result
- Handles whole documents, not just fragments
- Single newlines preserved as line breaks, matching how GitHub, GitLab, and most chat tools render Markdown
- Parse errors and malformed markup reported in the output pane rather than producing half-converted text
- Runs entirely in your browser — drafts and internal documentation are never uploaded
How to use it
- Pick the direction, or paste into whichever side you already have.
- Paste your Markdown or HTML into the input pane.
- Click Convert.
- Use Swap to reverse the direction, or copy the output.
Tips & common mistakes
- Converting HTML to Markdown is lossy by nature, because Markdown has no equivalent for most attributes. Classes, inline styles, and data attributes are dropped.
- Markdown to HTML is the reliable direction. Use the reverse for migrating content, then read the result before publishing it.
- A list or table that fails to convert usually needs a blank line before it in the Markdown source — that separation is what starts a new block.
- Complex tables with merged cells cannot be expressed in Markdown. Leave those as raw HTML, which most Markdown renderers pass through.
- For writing rather than converting, the Markdown Preview tool renders live side by side as you type.
- Check where the output is going: many CMSes and comment systems strip raw HTML for safety, so markup that works in one place may be silently removed in another.
- Single newlines become line breaks here. If your target renderer follows the stricter original rules, those breaks will disappear there — separate real paragraphs with a blank line so they survive either way.
- Round-tripping is not lossless in both directions: Markdown to HTML and back usually returns something equivalent, but HTML to Markdown and back will not reproduce the original markup byte for byte.
- To encode angle brackets and special characters for safe display first, use HTML Entity Encode / Decode.