Convert Markdown to HTML

Turn a .md file into HTML two ways: copy the clean rendered markup to paste into a CMS or email, or download a complete, self-contained HTML page with the theme, syntax highlighting, diagrams and math baked in.

Free · no sign-up · runs in your browser, nothing is uploaded

The Export menu: download .md, download .html, print to PDF, copy as HTML, copy Markdown — Export as Markdown, a standalone HTML page or PDF, or copy the rendered HTML — shown in the Paper theme.

Two kinds of HTML output

Copy as HTML puts the rendered fragment on your clipboard — semantic <h2>, <p>, <table>, <pre><code> markup without any wrapper styling, ready for a blog editor, a documentation system or an email that accepts rich text. Download .html produces a standalone page: the rendered document plus the CSS for the theme you are looking at, highlighted code, rendered Mermaid SVGs and KaTeX math, in one file you can open anywhere or host as-is.

What the converter handles

The conversion uses the same GitHub-Flavored Markdown renderer as the preview: headings with anchor ids, emphasis, links, images, ordered and unordered lists, task lists, tables with alignment, blockquotes and GitHub alerts, fenced code with language classes, footnotes, <details> sections, front matter, emoji shortcodes, Mermaid diagrams and math. Inline HTML in the source passes through after sanitization, so scripts and event handlers never end up in the output.

Choose how the page looks first

Because the export carries the active theme, set it up before you download: pick one of 16 light or dark themes, choose sans, serif or mono body text, and set the text size and page width from the settings menu. The exported page uses those choices and includes a print stylesheet, so it doubles as a PDF source.

See it in action

Syntax-highlighted TypeScript, Python, Bash and diff code blocks with language labels and copy buttons — Code blocks get a language label, syntax highlighting for 50+ languages and a copy button — this is the One Dark theme.

The theme picker showing 16 light and dark themes with colour swatches — Sixteen themes, each with its own syntax palette — or follow the system light/dark setting.

KaTeX display math and a Mermaid flowchart rendered inside the preview — KaTeX formulas and Mermaid flowcharts render right inside the document.

How it works

1
Paste your Markdown or open the .md file; check the preview.
2
Pick a theme and typography — the export uses whatever the preview shows.
3
Export → Copy as HTML for a fragment, or Download .html for a complete page.

What you get

Clean semantic markup

No inline styles in the copied fragment; ids on headings; language classes on code.

Standalone page export

One HTML file with theme CSS, highlighted code, diagrams and math included.

GFM + extensions

Tables, task lists, alerts, footnotes, details, front matter, Mermaid, KaTeX.

Sanitized

Inline HTML is cleaned with DOMPurify before it is rendered or exported.

Browser-side

Conversion runs locally; your document is never uploaded.

Batch-friendly

Open the next file with drag & drop and export again — no page reloads.

Frequently asked questions

Does the HTML include CSS?

Copy as HTML gives you unstyled semantic markup. Download .html embeds the CSS for the current theme so the file looks the same anywhere.

Can I convert several Markdown files?

One document at a time: open a file, export, open the next. There is no size limit beyond your browser's memory; files up to 5 MB open directly.

Are code blocks highlighted in the output?

Yes. Code is highlighted with highlight.js and the standalone page carries the colour rules for the chosen theme.

What happens to Mermaid diagrams and math?

They are exported as rendered SVG (Mermaid) and KaTeX HTML, so the page shows them without loading any scripts.

Is the output valid HTML5?

Yes — a UTF-8 HTML5 document with a viewport meta tag, a title taken from your file name and an <article class="markdown-body"> containing the content.

Related tools

Ready when you are

Paste Markdown, drop a file, or open a URL — the preview appears instantly and everything stays on your device.

Open Markdown Viewer