HTML ↔ Markdown Converter

Convert HTML to Markdown or Markdown to HTML instantly in your browser. Clean, private, fast, and built with a professional side-by-side workspace, live conversion, syntax-friendly output, and a rendered preview panel.

Content Creation, Docs, Blogs & Developer Workflows

Perfect for writers, bloggers, developers, CMS workflows, documentation, static sites, notes, README files, and quick content cleanup. Paste HTML or Markdown, auto detect the direction, convert instantly, then preview the rendered result before copying or downloading.

🌐 HTML → Markdown 📝 Markdown → HTML 🧠 Auto Detect 👀 Live Preview ⚡ Instant 🔒 Browser Only

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Drop an HTML or Markdown file here

Paste code below or upload a file to convert it instantly.

📄 .html .htm .md .markdown .txt · ⚡ instant conversion · 👀 live preview · 📥 download · 🔒 no upload

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Input & Converted Output

Paste raw HTML or Markdown on the left. The right side shows converted output in a compact, scrollable workspace.

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Input Analysis

Inspect detected format, headings, links, lists, images, code blocks, and a compact structural preview before converting.

Run the tool or click Analyze Input to inspect the current content here.

Rendered Preview

Preview the converted result exactly as content authors and readers would see it.

Converted content preview will appear here.

Result Snapshot

See quick stats about the current output including direction, detected input type, output type, line count, and total size.

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Keyboard shortcuts

Ctrl + Enter convert now
Ctrl + K analyze input
Tab stays natural inside the editor

Best practice

Use this when moving content between CMS editors, blog posts, README files, static site generators, email templates, or documentation systems. Everything runs fully in your browser.

Nothing gets uploaded or stored on our servers. Your HTML and Markdown stay local on your device.

Authoring-format conversion with semantic review

Convert HTML and Markdown while checking links, headings, lists, code blocks, raw HTML, and sanitization

HTML and Markdown overlap for common prose but have different capabilities and dialects. Choose the direction, heading style, bullet marker, code-block style, raw HTML policy, blank-line cleanup, output beautification, and sanitized preview, then compare structure rather than expecting a perfect visual round trip.

Semantic mapping

Headings, paragraphs, emphasis, links, lists, quotes, and code map better than layout

Simple article content usually converts predictably. Div-based layouts, forms, tables, media, custom data attributes, embedded styles, and interactive elements may be simplified or kept as raw HTML. Review heading levels and list nesting, because visual indentation in source HTML does not always express the intended document outline.

Dialect

Markdown output depends on the parser and destination conventions

ATX versus setext headings, fenced versus indented code, bullet symbols, tables, task lists, footnotes, and raw HTML support vary among CommonMark, GitHub-flavored Markdown, static-site generators, and CMS platforms. Test the result in the actual destination rather than only the local preview.

Security

Rendered Markdown becomes HTML and must be sanitized when input is untrusted

Markdown can contain links, images, and sometimes raw HTML. Sanitizing a preview reduces some risks but does not automatically make every URL scheme, embedded asset, or destination safe. Use the platform's established renderer, sanitizer, Content Security Policy, and link handling for user-generated content.

Practical review

Markup conversion review

Compare the output in the destination renderer and inspect both structure and safety.

Verify one h1-equivalent title and a logical heading hierarchy.
Check nested lists, links, images, blockquotes, tables, and code fences.
Review whitespace and special characters inside inline and block code.
Decide deliberately whether raw HTML should be kept, escaped, or removed.
Render untrusted content only through the destination's approved sanitizer.

HTML and Markdown questions

Round trips, dialects, headings, code blocks, raw HTML, and safe rendering

Will HTML-to-Markdown conversion preserve the exact page design?

No. Markdown represents document content and limited structure, not arbitrary CSS layout, forms, scripts, or visual positioning.

Why does Markdown render differently on another site?

Platforms support different Markdown dialects and extensions. Tables, task lists, footnotes, raw HTML, and line-break behavior can vary.

Should I use ATX or setext headings?

ATX headings use hash marks and support all levels consistently. Setext syntax is limited to the top levels. Follow the destination or repository convention.

How are code blocks preserved?

Fenced blocks are usually clearer and can include a language label, but content containing the fence marker may require a longer fence. Verify indentation and special characters.

Is a sanitized local preview enough for user-generated Markdown?

No single preview proves the production pipeline is safe. Use the same renderer and sanitizer policy as production and restrict unsafe URL schemes and embedded content.

Can I convert Markdown to HTML and back without changes?

Not generally. Different Markdown source can render to the same HTML, and HTML features may have no Markdown equivalent, so round trips can normalize or lose details.