What is Markdown?
Markdown is a lightweight markup language created by John Gruber and Aaron Swartz in 2004. Its design philosophy is to make writing and reading documents as simple as possible — you write in plain text and can easily convert it to structured HTML. Markdown's syntax is simple and intuitive, taking only minutes to learn, which is why it's widely used on platforms like GitHub, Stack Overflow, and Reddit.
Why Convert Markdown to HTML?
Markdown itself is plain text — while easy to write and manage, it cannot directly display structured effects (headings, lists, code blocks, etc.) on a web page. By converting Markdown to HTML, you can:
- Publish to the web: Quickly publish Markdown-written articles and documents to blogs, CMS platforms, and documentation sites.
- Embed in emails / rich-text editors: Once converted to HTML, the content can be pasted into rich-text email clients or online editors.
- SEO optimization: Search engines parse HTML pages more effectively; rendered HTML content is better for indexing.
- Custom styling: After converting to HTML, you can freely apply CSS styles for unique visual effects.
Markdown Syntax Quick Reference
| Syntax | Effect | Description |
|---|
# Heading | H1 Title | Use # signs, number indicates level (1-6) |
**bold** | Bold | Double asterisks or underscores |
*italic* | Italic | Single asterisk or underscore |
~~strikethrough~~ | Strikethrough | Double tildes |
`code` | Code | Backticks (inline code) |
```code block``` | Multi-line block | Triple backticks, optional language |
> blockquote | Blockquote | Greater-than sign prefix |
- list item | Unordered list | Dash, asterisk, or plus sign |
1. list item | Ordered list | Number followed by period |
[text](url) | Hyperlink | Brackets + parentheses |
 | Image | Exclamation + brackets + parentheses |
| Col1 | Col2 | | Table | Built with pipes and dashes |
Comparison of Popular Markdown Parsers
There are several Markdown parsers available, each with its own strengths:
- marked: An extremely fast lightweight parser supporting GFM (GitHub Flavored Markdown). This tool uses marked as its rendering engine.
- markdown-it: Plugin-based architecture with strong extensibility, supporting custom syntax rules.
- showdown: Compatible with legacy Markdown and parts of the CommonMark standard.
- remark: AST-based modular processing pipeline, suitable for scenarios requiring precise control.
Why Choose an Online Markdown Editor?
- Zero installation, ready to use: No software download needed — just open your browser and start writing.
- Real-time preview: See rendered results as you type, improving writing efficiency and accuracy.
- GFM extensions: Supports tables, task lists, strikethrough, and other GitHub-flavored extensions.
- Multiple export formats: One-click copy of Markdown source, HTML source, or rich text for various use cases.
- Local storage: Content is auto-saved to your browser's localStorage — never lose your work.
Tips & Tricks
- Use
Ctrl+B to quickly bold selected text and Ctrl+I for italics.
- Press
Tab to quickly insert a 4-space indentation.
- Select text and click toolbar buttons to wrap the selection with markdown syntax.
- Copy your finished article as rich text and paste it directly into platforms like WeChat, Zhihu, or Juejin.
- Use the table syntax
| Col | Col | to quickly create structured data displays.