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Markdown to HTML

Convert Markdown to clean HTML, with a live preview.

Runs in your browser Runs entirely in your browser. Nothing you put in it ever leaves your device.

0 words · 0 B of HTML

Renders as you type. Drop a .md file to open it.

Preview

Ready. Nothing is sent anywhere.

Raw HTML written inside the Markdown is shown as text rather than passed through. That is the trade this renderer makes for being safe by construction — and it is why the preview cannot run anything, whatever is pasted into it.

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About this tool

Write or paste Markdown and get HTML you can use, with a preview beside it. Headings, lists, tables, task lists, fenced code, blockquotes, links and images are all supported. The converter escapes everything it is given and only produces tags it writes itself, so the preview cannot run anything — whatever is pasted into it.

How to use it

  1. Paste or type Markdown on the left, or drop a .md file onto it.
  2. Watch the preview on the right, or switch to the HTML view to see the markup.
  3. Tick “complete HTML page” if you want something you can open in a browser rather than a fragment.
  4. Copy the HTML, or download it.

Supported input

  • Headings, paragraphs, blockquotes and horizontal rules
  • Bold, italic, strikethrough, inline code and hard line breaks
  • Bulleted, numbered and nested lists, including task lists
  • Fenced and indented code blocks, with a language class
  • Tables with column alignment
  • Links, images and automatic links

Privacy

Runs entirely in your browser. Nothing you put in it ever leaves your device. Everything happens in JavaScript on this page, so the tool keeps working even if you go offline after it has loaded — which is the simplest way to see for yourself that nothing is being sent. Read the full privacy information.

Questions

Why is my raw HTML showing as text instead of rendering?

Because this converter never passes HTML through. Most tools render everything and then try to strip the dangerous parts back out afterwards, which is a denylist and has needed a long series of fixes over the years. This one escapes the input and emits only tags it writes itself, so there is nothing to strip — at the cost of not supporting inline HTML.

Is the preview safe if I paste something malicious?

Yes. A script tag in your Markdown becomes visible text, and a link with a javascript: URL is rendered as plain text rather than as a link. The generated HTML is also checked once more before it is displayed, and the preview refuses to render anything the converter should not have been able to produce.

Which flavour of Markdown is this?

CommonMark’s common ground plus the GitHub additions people actually use: tables, strikethrough, task lists and automatic links. It is a defined subset rather than a complete implementation — footnotes, reference-style links, setext headings and inline HTML are not supported.

Why do my headings have id attributes?

So you can link to a section. They are generated GitHub-style from the heading text, and repeated headings get a numeric suffix so two sections called “Overview” do not end up with the same id. Turn it off with the checkbox if you do not want them.

Is my document uploaded?

No. The conversion happens in JavaScript on this page, so a draft, a set of release notes or an internal document never leaves your device.

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