Markdown to HTML Converter

Convert Markdown to HTML online and see a rendered preview — free converter.

Input Output

This tool needs JavaScript enabled in your browser to convert.

About

About the Markdown to HTML Converter

Paste Markdown and get back the HTML it renders to, with a rendered preview shown underneath the code — the same rendering marked (the parser behind many static site generators) would produce, so what you see here is what you'd get in a real build.

marked follows GitHub-flavoured Markdown by default, so tables, ~~strikethrough~~ and fenced code blocks work alongside the usual headings, lists and links. Raw HTML written inside the Markdown is passed straight through, and the output is plain tags with no CSS — the styling comes from the page you paste it into.

Guide

Using the Markdown to HTML Converter

How to use 4 Features 6 Who uses this 4

1

Step 1

Markdown to HTML is already the button to use — HTML to Markdown works the other way.
2

Step 2

Type or paste your Markdown into the input box.
3

Step 3

Click "Markdown → HTML" to see the rendered HTML code and a preview underneath.
4

Step 4

Copy the HTML output to paste into your own page or CMS.

Supports GitHub-flavoured extras such as tables, strikethrough and fenced code
Shows a live rendered preview under the HTML code
Passes raw HTML inside your Markdown through unchanged
Copy the result in one click
Loads the conversion library from this site the first time you use it
Runs in your browser — free, with no sign-up and nothing uploaded

Bloggers

Bloggers write in Markdown and paste the HTML into a CMS that only accepts HTML.

Developers

Developers turn a README section into HTML for docs, an email or a web page.

Newsletter writers

Writers draft in Markdown and paste the HTML into their email tool.

Technical writers

Writers check how tables and code blocks will render before publishing.

Convert the other direction

HTML to Markdown

Examples

Markdown to HTML Converter examples

5 worked examples

Markdown heading to HTML

Typing "# Welcome" produces <h1>Welcome</h1> in the output box, and the preview underneath shows it rendered as an actual heading.

Bold and italic text

"**bold** and *italic*" converts to <strong>bold</strong> and <em>italic</em>, wrapped in a <p> tag by marked.

A table in the preview

A pipe-delimited table with a |---|---| separator line renders in the preview as an actual HTML table, since marked supports GitHub-flavoured tables.

A fenced code block

A ```js fenced block containing console.log(1) converts to <pre><code class="language-js">console.log(1)</code></pre>, kept as code rather than turned into prose.

A task list

"- [x] done" and "- [ ] todo" convert to a list with one checked and one unchecked checkbox.

JSON Diff Checker

Compare two JSON documents structurally and list what was added, removed or changed.

Use it

Base32 Encoder and Decoder

Encode text to RFC 4648 Base32, or decode Base32 back to text.

Use it

XML Formatter and Validator

Pretty-print XML with indentation, or check whether it parses correctly.

Use it

URL Parser and Builder

Break a URL into its parts, or build one from protocol, host, path and query parameters.

Use it

IP Subnet (CIDR) Calculator

Work out the network range, broadcast address and host count for an IPv4 CIDR block.

Use it

UUID Validator and Inspector

Check whether a UUID is well-formed and identify its version and variant.

Use it

FAQ

Frequently asked questions

Quick answers to common questions about the Markdown to HTML Converter.

Still have a question?

Send us a message and we'll help you out.

How do I convert Markdown to HTML?

Paste your Markdown above and click "Markdown → HTML". The rendered HTML appears in the output box, with a preview below it — everything runs in your browser, using the marked library.

Does it show a preview of the rendered HTML, or just the code?

Both. The output box shows the raw HTML markup, and the preview panel underneath renders that HTML so you can see exactly what it will look like.

Does it support tables, code blocks and nested lists?

Yes — it uses marked, the same Markdown parser behind many static site generators, so GitHub-flavoured features like tables, fenced code blocks and nested lists all render correctly.

Is this Markdown to HTML converter free?

Yes. It's free, with no sign-up and no limit on how much you convert.

Can I convert HTML back to Markdown?

Yes — the same tool handles both directions. Click "HTML → Markdown" instead, or use the dedicated HTML to Markdown converter page.

Is my Markdown sent anywhere when I convert it?

No. The conversion runs directly in your browser — nothing is uploaded to a server.

Does it support task lists and strikethrough?

Yes. marked handles GitHub-flavoured extras: - [x] items become checked checkboxes, ~~text~~ becomes <del> strikethrough, and bare URLs like https://example.com turn into links automatically.

Is raw HTML inside my Markdown kept or removed?

It's kept exactly as written — marked passes HTML tags straight through without sanitising them. That's handy for your own content, but don't publish converted Markdown from untrusted sources without cleaning it, since a <script> tag would come through too.

Why doesn't a single line break start a new line?

In standard Markdown, a single line break inside a paragraph is treated as a space. Leave a blank line to start a new paragraph, or end the line with two spaces to force a <br> line break.

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Markdown to HTML Converter

About the Markdown to HTML Converter

Using the Markdown to HTML Converter

Convert the other direction