Skip to main content

Markdown to HTML converter

Convert Markdown to styled HTML

No watermarkFree & unlimited
All processing happens in your browser. No data is sent to any server.

The file is parsed by marked, which implements CommonMark plus the GitHub extensions, so tables, task lists, strikethrough, autolinks and fenced code blocks all convert as you would expect. The generated markup is then wrapped in a complete HTML5 document carrying a stylesheet in its head: an 800 px reading column, 1.7 line spacing, underlined-rule headings, grey code backgrounds, bordered tables and blue links. The download is one file that renders correctly on its own, with no build step, no assets folder and no stylesheet to link.

Key facts about Markdown to HTML converter

Key facts about Markdown to HTML converter
Parsermarked 17 with GitHub Flavoured Markdown on: tables, task lists, strikethrough, autolinks, fenced code.
Output shapeA standalone HTML5 file with doctype, lang attribute, UTF-8 charset, viewport meta and an inline style block.
Built-in styling800 px centred column, system font stack, #24292e text, #f6f8fa code background, #dfe2e5 table borders.
Syntax highlightingNot applied. A fenced block keeps its language class so a highlighter can attach later, but nothing colours it.
Front matterNot parsed. A YAML block at the top of the file renders as a rule followed by its key and value lines as text.
Table of contentsNot generated, and headings get no anchor ids, so in-page links have to be written by hand.
FootnotesNot supported by core marked, so footnote syntax comes through as literal text rather than links.
Raw HTMLPassed through unescaped, which is convenient for authors and a reason not to run untrusted Markdown through it.
Document titleAlways the literal string Converted Markdown, regardless of the first heading in the file.
Images and linksLeft as references. Relative paths still point at their original locations, so move the assets with the file.
Input accepted.md and .markdown files. Both extensions are recognised by the picker and by drag and drop.
Typical size deltaMarkup and the style block add roughly 2 KB, so a 12 KB README leaves as about 16 to 20 KB of HTML.

What happens to your file

The Markdown is read as text by the File API and parsed by marked, which is bundled into this page, so the parsing happens on your own machine. The resulting string is concatenated with the stylesheet and wrapped in a Blob for download. There is no upload, no rendering service and no preview server involved. The one thing worth noting is that the output references images and links exactly as you wrote them, so opening the file later may request those remote resources from your browser as normal.

About this tool

  1. 1

    Add the Markdown file

    Drop a .md or .markdown file on the panel, or click to browse. A batch can be converted in one pass.

  2. 2

    Strip the front matter

    Remove any YAML block at the top first, since it is not recognised and would render as visible text.

  3. 3

    Convert

    marked parses the document and the page wraps the markup in a full HTML5 file with its stylesheet.

  4. 4

    Open and check

    View the .html in a browser to confirm tables, code blocks and links came through the way you intended.

  5. 5

    Download

    Save the single file, or take a multi-file run as one ZIP assembled inside the browser.

Specs & compatibility
Input and outputTakes .md and .markdown (text/markdown) and returns the HTML as a blob with the text/html type, named after the file you dropped in.
Enginemarked 17.0.4 bundled into the page turns the Markdown into HTML, which is wrapped in a complete document with the stylesheet inlined in a style block.
ModesFile mode only: Markdown to HTML has no paste box, so the Markdown arrives through the picker or a drag and drop and the HTML comes back as a download.
Batch and capsTwenty Markdown files per run at 500 MB each; several HTML results are zipped in page memory as converted-html-files.zip.
Browser and deviceMarkdown to HTML needs only the File API, a Blob download and the parser already in the bundle, so every current browser behaves the same and the page keeps working with the network off.
  • Keep image paths relative and copy the images next to the HTML file, because references are not rewritten or inlined during conversion.
  • For coloured code samples, add a highlighter script and theme to the head afterwards. The language classes marked emits are exactly what libraries like Prism and highlight.js look for.
  • Change the title element before publishing. Every conversion leaves the same placeholder, which is unhelpful in a browser tab and in search results.
  • If you only want the body markup for a CMS, copy what sits between the body tags and leave the head behind.
  • Never convert Markdown from an untrusted source and then publish the result unchanged, because raw HTML inside the source passes through the parser untouched.
  • Publish a README, changelog or specification as a browsable page without setting up a static-site generator.
  • Send a formatted document to someone who does not use Markdown, in a single file that opens in any browser.
  • Produce a quick styled preview of documentation to check structure and tables before committing it to a repository.
CommonMark with the GitHub extensions enabled, which covers pipe tables, task list checkboxes, strikethrough, automatic linking of bare URLs and fenced code blocks with a language tag. What is not included are the extras some platforms add on top, such as footnotes, definition lists, admonition blocks and Mermaid diagrams, all of which come through as ordinary text.
No highlighting library is bundled with the converter, so the parser emits a code element with a language class and stops there. The block still gets its grey background, padding and monospaced font from the built-in stylesheet. To add colour, link a highlighter such as Prism or highlight.js in the head of the generated file, and it will pick up those classes automatically.
It is treated as ordinary Markdown. The opening three dashes become a horizontal rule and the key and value lines render as a paragraph, so your title and date end up visible at the top of the page. Delete the block before converting, or accept that you will need to remove the stray lines from the HTML afterwards.
Yes, by editing the output. All styling lives in one style element in the head, so you can delete it and link your own file, or keep it as a starting point and override individual rules. If you are pasting into an existing site, take only the markup inside the body element and let your site design handle the appearance.
No. Image references are copied through exactly as written, so a relative path still points at a neighbouring file and a remote URL still points at its server. Keep the images alongside the HTML when you move it, or rewrite the paths to absolute URLs. The Word conversion on this site does inline images, but Markdown input is left untouched.
Not for this pair. The paste-and-convert mode is available where both sides of the conversion are data formats, and HTML is not one of them here, so the tool works from a file. Save your Markdown to a .md file, or drag it straight out of your editor onto the drop panel, and convert from there.

Related tools

View all

Updated

We use anonymous analytics to improve ToolChamp. No personal data is stored or sold. Privacy Policy