Markdown ↔ HTML Converter

Convert Markdown to HTML with marked (MIT, GitHub-flavored) — or paste HTML and get clean Markdown back via turndown (MIT). No uploads, no sign-up, works offline.

100% Private — Runs entirely in browserInstant calculation & resultFree, no sign-up
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Why convert Markdown ↔ HTML with marked and turndown?

Markdown is the preferred writing syntax for developers, technical writers, and content creators, while browsers display HTML markup. Converting Markdown to HTML or reverse-converting HTML content into clean Markdown is an essential documentation workflow. ToolJiffy converts between Markdown and HTML instantly in your browser.

  • Bidirectional Markdown ↔ HTML Conversion: Convert GFM Markdown into clean HTML or reverse-convert HTML web content into clean Markdown syntax.
  • Full GitHub Flavored Markdown (GFM) Support: Converts GFM tables, task lists (- [x]), strikethrough, blockquotes, and fenced code blocks.
  • Clean HTML to Markdown Extraction via Turndown: Strips verbose inline styles and converts HTML headings, lists, and links into concise Markdown.
  • 100% On-Device Browser Security: Converts content locally in browser memory without sending document drafts to cloud servers.

marked + turndown client-side parsing engine

ToolJiffy combines the MIT-licensed marked engine for Markdown-to-HTML parsing with the turndown engine for HTML-to-Markdown reverse conversion running directly in browser memory.

Whether preparing blog posts for static site generators (Astro, Hugo, Jekyll), migrating CMS content from WordPress to GitHub, or converting README.md files, ToolJiffy guarantees clean, spec-compliant conversion.

Performance & developer productivity features

Using client-side browser developer tools streamlines coding workflows by removing friction. Developers can instantly paste code, reformat syntax, validate data structures, and copy output without leaving their browser tab or installing heavy IDE extensions.

  • Instant Real-Time Processing: Computes results in milliseconds using browser WebAssembly engines.
  • Cross-Platform Compatibility: Works identically across Chrome, Firefox, Safari, Edge, and mobile browsers.

Client-side security for private documentation drafts

Pasting unreleased documentation, proprietary technical articles, or internal wiki content into online converters creates security risks if text is sent to cloud servers.

ToolJiffy operates on a zero-cloud architecture. All conversion runs 100% locally in your browser tab. Your document content never leaves your device.

Step-by-step guide to converting Markdown ↔ HTML

  1. Paste content: Copy your Markdown document or HTML code into the input editor above.
  2. Select conversion direction: Click Markdown → HTML or HTML → Markdown.
  3. Copy converted result: Review the clean output and click Copy Code.

Frequently asked questions

How does Markdown ↔ HTML conversion work in browser memory?

ToolJiffy converts Markdown to HTML using marked (MIT, GitHub-flavored parser) and converts HTML back to clean Markdown using turndown (MIT parser) running in browser memory.

What GitHub Flavored Markdown (GFM) features are supported?

GitHub Flavored Markdown features including tables, task checkboxes (- [x]), strikethrough (~~text~~), fenced code blocks with language highlighting, and autolinks parse cleanly.

Does HTML to Markdown conversion produce clean Markdown syntax?

Yes! The turndown engine strips redundant inline styles and HTML tags, converting headings (<h1>–<h6>), lists (<ul>/<ol>), blockquotes, and links into standard Markdown syntax.

Is my document content uploaded to any cloud server during conversion?

No, 100% private. All parsing and conversion algorithms run locally inside your browser memory. Your documentation and article drafts never touch external servers.

Can I convert Markdown documentation for Static Site Generators (Astro, Hugo, Jekyll)?

Yes! Converted Markdown files follow standard CommonMark and GFM specifications, perfect for Astro, Hugo, Jekyll, and Next.js content collections.

Does Markdown to HTML conversion sanitize raw HTML tags?

The marked parser renders valid HTML output while preserving code block escapes for safety.

What is the main use case for converting HTML to Markdown?

Converting HTML to Markdown is essential when migrating blog posts from WordPress or Medium into headless CMS platforms, static site generators, or GitHub repos.

Is ToolJiffy Markdown ↔ HTML Converter free without limits?

Yes! ToolJiffy is 100% free with unlimited usages, zero account sign-ups, and zero watermarks.

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