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Data & Code Converters

HTML to Markdown Converter (MD to HTML)

Instant on-device convert

Transform HTML and Markdown locally with Turndown and marked. Ideal for docs, READMEs, and CMS content migrations.

Direction

All conversion runs locally in your browser—nothing is uploaded.

Drop a HTML file, or browse

Accepts HTML · max 5.00 MB · private client-side convert

Browse files
Size budget0 B / 5.00 MB

Plain-English guide

Terms & how it works

Confused by a field? Read the short definitions here while you use the tool.

  • html

    HTML source

    Tags and text to convert into Markdown.

  • md

    Markdown source

    Lightweight markup rendered to HTML.

  • AST

    Parse tree

    Intermediate structure used by the Markdown renderer.

When to use this HTML ↔ Markdown

Common use cases

  • Transform sample payloads without uploading sensitive data
  • Move between JSON, CSV, YAML, XML, or Base64 quickly
  • Clean developer workflow conversions in the browser

Localized examples

  • UTF-8 text and spreadsheet-friendly CSV output
  • Config file migrations for local projects

What you get

  • Client-side conversion — files stay private
  • Bidirectional transforms where supported
  • No sign up, instant result

How to Convert HTML ↔ Markdown Step-by-Step

  1. 1Select HTML → Markdown or Markdown → HTML.
  2. 2Paste markup or drop an .html/.md file.
  3. 3Convert to generate the other format.
  4. 4Copy or download the output for your editor.
  5. 5Re-run after edits—conversion is instant and private.

Governing formula

HTML ⇄ Markdown(AST)

HTML is reduced to Markdown via Turndown (ATX headings, fenced code). Markdown is rendered to HTML with marked under GFM defaults.

Use the defaults, then adjust one input at a time to see the result update instantly—no sign up.

Variable definitions

  • html

    HTML source

    Tags and text to convert into Markdown.

  • md

    Markdown source

    Lightweight markup rendered to HTML.

  • AST

    Parse tree

    Intermediate structure used by the Markdown renderer.

  • Client-side libraries only—content never leaves the browser.
  • Prefer semantic HTML for cleaner Markdown.

Frequently Asked Questions

Markdown → HTML uses marked with GFM enabled for common constructs like tables and fenced code.

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Community

Reviews & Ratings

See what others think about this tool, then leave your own rating to help improve CalculioHub.

4.8

out of 5.0

4 reviews

Leave a review

Your rating

Aisha K.

Mar 12, 2026

Clean layout and the results update instantly. Exactly what I needed for a quick planning check.

Daniel R.

Feb 28, 2026

Very usable on mobile. Would love a save/export option later, but the math feels solid.

Priya S.

Feb 3, 2026

The FAQ section answered my questions before I even had to search. Smooth dark mode too.

Marcus L.

Jan 19, 2026

Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.

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