Markdown ↔ HTML Converter

What Is Markdown?

Markdown lets you write formatted content using plain text. Instead of clicking buttons in a word processor, you use simple symbols:

# Heading 1
## Heading 2

**Bold text** and *italic text*

- Bullet point
- Another point

[Link text](https://example.com)

> Blockquote

It’s the standard for technical documentation, GitHub READMEs, blog platforms like Ghost and Hugo, and note-taking apps like Obsidian and Bear.

How This Tool Works

Markdown → HTML uses the marked library (loaded on demand) to parse Markdown syntax and generate standards-compliant HTML. The library handles all CommonMark syntax plus common extensions like tables and task lists.

HTML → Markdown uses a rule-based converter that recognizes common HTML patterns and translates them back to Markdown syntax. It handles headings, paragraphs, emphasis, links, images, lists, blockquotes, code blocks, and horizontal rules.

All conversion happens in your browser — no data is sent to any server.

Common Use Cases