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Free HTML to Markdown Converter (and Back)

Convert HTML to Markdown and back|

4.8 (1,201)

A free, fully private two-way converter between HTML and Markdown that runs entirely in your browser. For HTML to Markdown it uses Turndown (mixmark-io/turndown), an open-source library whose own tagline is "Convert HTML into Markdown with JavaScript", trusted across thousands of production apps. For the reverse direction, Markdown to HTML, it uses marked, a fast, low-level Markdown compiler built for speed. Paste or type your source on the left, flip the direction toggle, and the converted output appears on the right alongside a rendered preview so you can see exactly what the result looks like. The HTML to Markdown engine is configurable the way Turndown is: ATX-style headings (# Heading), fenced code blocks with triple backticks, and a dash bullet-list marker by default, with Turndown automatically escaping Markdown special characters so your text never turns into unintended syntax. The Markdown to HTML engine uses marked with GitHub-flavored defaults so tables, fenced code, task lists, and inline formatting all render correctly. When you are happy with the result, copy it to the clipboard with one click or download it as a .md or .html file. Nothing you paste is ever uploaded: both Turndown and marked run as JavaScript on your device, with no account, no API key, and no server round-trip, which you can confirm in your browser DevTools Network tab.

turndownmixmark-iomarkedhtml-to-markdownmarkdown-to-htmlhtml-markdown-convertermarkdown-converterin-browserno-upload

mixmark-io/turndownv7.2.4

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Convert HTML to Markdown with Turndown, right in your browser

This tool turns HTML into clean, readable Markdown without sending anything to a server. It is built on Turndown (mixmark-io/turndown), an open-source library that describes itself simply as a way to "Convert HTML into Markdown with JavaScript". Turndown is configurable and extensible, and it is used in thousands of production apps to pull rich-text content out of web pages, emails, and content management systems and turn it into the plain-text Markdown that powers READMEs, wikis, and static sites.

By default this page runs Turndown with the options most people want: ATX-style headings so a heading becomes "# Heading", fenced code blocks using triple backticks, and a dash as the bullet-list marker. Turndown also automatically escapes Markdown special characters in your text, so a literal asterisk or underscore in your HTML does not accidentally become bold or italic. Paste your HTML on the left and the Markdown appears instantly on the right, ready to copy or download.

Go the other way too: Markdown to HTML with marked

Flip the direction toggle and the tool converts Markdown back into HTML using marked, a fast, low-level Markdown compiler built for speed and correctness. marked supports GitHub-flavored Markdown, so tables, fenced code blocks, task lists, links, images, and inline formatting all render the way you expect. This is ideal for taking Markdown notes and exporting them as HTML for a newsletter, an email template, or any system that only accepts HTML.

Whichever direction you choose, you get both the raw converted source and a live rendered preview side by side, so you can see exactly what the output looks like before you use it. When you are ready, copy the result with one click or download it as a .md file for Markdown output or an .html file for HTML output. Keep in mind that Markdown is intentionally a simple subset of HTML, so very complex or non-semantic markup may be simplified during conversion, that tradeoff is what keeps the Markdown clean.

Private by design: nothing leaves your device

Unlike many online converters that upload your content to a server to process it, this tool runs both conversion engines locally in your browser as JavaScript. The HTML or Markdown you paste, and the converted result, never leave your device and are never logged or stored remotely. There is no account to create and no API key to manage.

Both engines are fully open source, so the conversion logic is auditable: Turndown is released under the MIT License (Copyright Dom Christie), and marked is released under the MIT License. You can verify the privacy claim yourself at any time by opening the Network tab in your browser DevTools while converting and confirming that no request carries your input or the resulting output.

How It Works

Choose a direction with the toggle: HTML to Markdown (powered by Turndown) or Markdown to HTML (powered by marked).

Paste or type your source on the left, and the converted output appears instantly on the right with a live rendered preview.

Copy the result to your clipboard with one click, or download it as a .md or .html file to use anywhere.

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Key Features

HTML to Markdown powered by Turndown (mixmark-io/turndown), whose own positioning is "Convert HTML into Markdown with JavaScript", a battle-tested library used in thousands of production apps

Markdown to HTML powered by marked, a fast, low-level Markdown compiler, so both directions use dedicated, purpose-built open-source engines instead of fragile hand-rolled regex

Configured the Turndown way: ATX-style headings (headingStyle: atx), fenced code blocks (codeBlockStyle: fenced), and a dash bullet-list marker (bulletListMarker: -) for clean, predictable Markdown

Turndown automatically escapes Markdown special characters so your content never collapses into unintended syntax, and marked renders GitHub-flavored Markdown including tables, task lists, and fenced code

Live rendered preview of the output plus the raw converted source, side by side, so you can verify the result before you copy or ship it

One-click copy to clipboard and download as a .md (Markdown) or .html file, with a character count and clear empty, loading, and error states

Runs 100% in your browser as JavaScript: no server-side rendering, no API calls, and no upload of the content you paste

Open-source and free to inspect: Turndown is released under the MIT License (Copyright Dom Christie), and marked is released under the MIT License

Privacy & Trust

All conversion happens locally in your browser: the HTML or Markdown you paste is never sent to any server, logged, or stored remotely

Both engines are open source and auditable: Turndown (mixmark-io/turndown) is MIT-licensed (Copyright Dom Christie), and marked is MIT-licensed

No account, signup, or API key is required to convert, copy, or download your content

Verify privacy yourself by opening the Network tab in your browser DevTools while converting: you will see no request carrying your input or the result

Use Cases

1Convert HTML copied from a webpage, email, or CMS into clean Markdown for a README, blog post, wiki, or documentation site

2Turn Markdown notes into HTML for a newsletter, email template, or any system that only accepts HTML

3Migrate content between platforms, for example pulling rich-text HTML out of an old CMS and pasting it into a Markdown-based static site

4Clean up messy pasted HTML by round-tripping it to Markdown and back to get simpler, more readable markup

5Preview how a chunk of Markdown will render as HTML before committing it to a docs repo or pull request

6Quickly draft formatted content in Markdown and export it as a ready-to-use .html file for a one-off page or snippet

Limitations

Complex or non-semantic HTML may not map perfectly to Markdown: layout-heavy markup, nested tables, inline styles, and custom elements have no direct Markdown equivalent and can be simplified or dropped by Turndown.
Markdown is intentionally a subset of HTML, so a round trip (HTML to Markdown to HTML) will not always reproduce the original markup byte for byte, especially for attributes, classes, and styling.
The rendered preview shows the converted output and is intended for content you authored yourself, it is not a sandbox for running or testing untrusted third-party HTML or scripts.
The page and the Turndown and marked libraries must load once before conversion works, so the very first visit needs a network connection, after which conversion runs locally.

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Frequently Asked Questions

Is this HTML to Markdown converter free?

Yes, it is completely free with no usage limits. You can convert as much HTML or Markdown as you like, copy and download the results, and never pay, sign up, or install anything. It is built on two open-source libraries, Turndown and marked, both released under the MIT License, so the tool and its conversion engines are free to use and free to inspect.

Is my content sent to a server when I convert it?

No. The entire conversion runs on your device inside the browser. Turndown converts HTML to Markdown and marked converts Markdown to HTML, both as JavaScript that executes locally. The content you paste and the converted result never leave your machine, are not uploaded, and are not logged. You can confirm this by opening the Network tab in your browser DevTools while converting: you will see no request carrying your input or output.

What library does this use to convert HTML to Markdown?

It uses Turndown (mixmark-io/turndown), an open-source JavaScript library whose own description is "Convert HTML into Markdown with JavaScript". Turndown is configurable and extensible, automatically escapes Markdown special characters, and is used in thousands of production applications. This tool runs Turndown with ATX-style headings, fenced code blocks, and dash bullet markers for clean, predictable Markdown.

Can it also convert Markdown back to HTML?

Yes. Flip the direction toggle to Markdown to HTML and the tool uses marked, a fast, low-level Markdown compiler, to render your Markdown as HTML. It supports GitHub-flavored Markdown features like tables, fenced code blocks, and task lists. You get both the raw HTML output and a live rendered preview, and you can copy the HTML or download it as an .html file.

Will the conversion be perfect for complex HTML?

Not always, and that is by design. Markdown is a deliberately simple subset of HTML, so complex or non-semantic markup, such as nested tables, inline styles, layout containers, and custom elements, has no exact Markdown equivalent and may be simplified or dropped. For typical content like headings, paragraphs, lists, links, images, code, and basic tables, the conversion is clean and reliable.

Do I need to install an app or create an account?

No. There is nothing to install and no account to create. The converter is a single web page that loads the Turndown and marked libraries and runs in any modern browser on desktop, tablet, or phone. Just open the page, pick a direction, paste your content, and copy or download the result.

Is the rendered preview safe for untrusted HTML?

The preview is meant for content you authored yourself, such as your own Markdown rendered to HTML. It is not a sandbox for executing or testing untrusted third-party HTML or scripts. Because everything runs locally in your own browser tab, there is no server involved, but you should still only preview content you trust, exactly as you would with any document you open on your machine.