Free online MMD to HTML converter

Applications that accept web pages, browser viewing, or static-site publishing may require HTML instead of a .mmd source file. Converting it preserves headings, links, lists, code blocks, and other markup as browser-readable elements.

What the MMD format is

In the Documents category, MMD usually means a MultiMarkdown source document. It is plain text that uses Markdown syntax plus extensions such as tables, footnotes, metadata, citations, definition lists, and cross-references.

MMD files can be created in MultiMarkdown-aware editors such as MultiMarkdown Composer, Scrivener, or any text editor. The file is commonly saved with the .mmd extension. Unlike a word-processing document, it stores markup instructions rather than fixed page layout, so the final appearance is determined by the converter and any CSS applied to the HTML.

What the HTML format is

HTML is the markup format interpreted by web browsers. An HTML conversion turns source markers into elements such as <h1>, <p>, <ul>, <blockquote>, and <code>.

HTML is suitable for publishing documentation, opening the result directly in a browser, embedding content in a website, and archiving a readable version that does not require a MultiMarkdown editor. The conversion normally creates an HTML document or body fragment; it does not automatically create a complete visual design, web application, or self-contained package of linked images.

How to convert MMD to HTML

Use MultiMarkdown locally

1. Install the MultiMarkdown command-line processor for your operating system.
2. Place the source file, for example notes.mmd, in a working folder.
3. Run multimarkdown notes.mmd > notes.html in a terminal.
4. Open notes.html in a browser and check headings, footnotes, tables, links, and code blocks.

Using the MultiMarkdown processor is the best choice when the file contains MultiMarkdown-specific syntax, because it is designed for that dialect rather than only standard Markdown.

Use Pandoc

Pandoc can read the MultiMarkdown variant and write HTML with:

pandoc --from=markdown_mmd --to=html --output=notes.html notes.mmd

Use Pandoc when you need additional output controls, such as a standalone document, a template, or a stylesheet. For a complete HTML file with document metadata, use:

pandoc --from=markdown_mmd --to=html5 --standalone --output=notes.html notes.mmd

To apply a stylesheet, add --css=styles.css. Keep styles.css beside the generated file, or change the stylesheet URL to the location used by your website.

Convert without installing software

You can convert the file for free on 101convert.com by choosing the MMD input and HTML output formats, uploading the source, and downloading the generated file. Review the result in a browser, especially if the source uses footnotes, citations, raw HTML, or local image paths.

Quality and compatibility considerations

• Conversion preserves document structure, not the exact appearance of a word processor or printed page. Add CSS when typography, spacing, colors, or table borders matter.
• Images and linked files are usually referenced by their original relative paths. Move those assets with the HTML file or update the generated URLs; use a data URI or an asset-bundling workflow if a single self-contained file is required.
• MultiMarkdown extensions are not implemented identically by every converter. A Pandoc conversion may require syntax adjustments, while the MultiMarkdown processor generally provides better compatibility with MultiMarkdown-specific features.
• Raw HTML embedded in the MMD source may pass through unchanged, but invalid tags or scripts can produce unexpected output and create security risks when the result is published.
• Metadata handling varies by tool. Check the generated <title>, author fields, footnote identifiers, citation links, and character encoding before publication.