Markdown Editor & Preview

How to Use the Markdown Editor

1. Type or paste Markdown in the editor on the left. The preview updates in real time on the right.
2. Use the toolbar buttons to quickly insert formatting like bold, italic, links, code, and more.
3. Click Copy HTML to copy the rendered HTML output to your clipboard.
4. Click Copy Markdown to copy the raw Markdown source text.

About Markdown

Markdown is a lightweight markup language created by John Gruber and Aaron Swartz in 2004. It was designed to be easy to read and write in its raw form while being convertible to structurally valid HTML. Markdown has become the de facto standard for writing documentation on platforms like GitHub, GitLab, Stack Overflow, Reddit, and countless content management systems.

The syntax is intentionally minimal: hash symbols for headings, asterisks for emphasis, brackets and parentheses for links, backticks for code, and dashes for lists. This simplicity makes Markdown faster to write than HTML while remaining highly readable even without rendering. This editor implements the core Markdown specification including headings, emphasis, links, images, lists, code blocks, blockquotes, horizontal rules, and line breaks.

Common Markdown Examples

These examples cover the most frequently used Markdown syntax. Copy and paste them into the editor above to see how they render in real time.

Headings and Text Formatting

# Heading 1
## Heading 2
### Heading 3

This is **bold text** and this is *italic text*.
This is ***bold and italic*** combined.
This is ~~strikethrough~~ text.
This is `inline code` within a sentence.

Links and Images

[Link Text](https://example.com)
[Link with Title](https://example.com "Hover Title")

![Alt text for image](https://example.com/image.png)
![Logo](logo.png "Company Logo")

Lists

Unordered list:
- Item one
- Item two
  - Nested item
  - Another nested item
- Item three

Ordered list:
1. First step
2. Second step
3. Third step

Code Blocks

Inline: Use `const x = 42;` in your code.

Fenced code block:
```javascript
function greet(name) {
  return `Hello, ${name}!`;
}
```

Blockquotes and Horizontal Rules

> This is a blockquote.
> It can span multiple lines.
>
> And have multiple paragraphs.

---

Content below the horizontal rule.

README Template

# Project Name

Brief description of the project.

## Installation

```bash
npm install my-project
```

## Usage

```javascript
const lib = require('my-project');
lib.doSomething();
```

## Contributing

Pull requests are welcome.

## License

MIT

Markdown Syntax Cheat Sheet

A complete reference for Markdown syntax. Bookmark this page for quick lookup when writing documentation.

Why Markdown Has Become the Standard for Technical Writing

Markdown's success stems from a simple design principle: the raw source should be as readable as the rendered output. Unlike HTML, where tags obscure the content, Markdown uses punctuation characters that visually suggest the formatting they represent. Asterisks around a word (*bold*) look like emphasis even before rendering. Hash symbols before a line (## Heading) clearly indicate hierarchy. This readability-first approach means Markdown files are useful even without a renderer, which is why they are the standard for README files, commit messages, and documentation that might be viewed in a plain text terminal.

The ecosystem around Markdown has grown enormously since its creation in 2004. GitHub adopted it as the default format for documentation, issues, and pull requests, exposing millions of developers to the syntax. Static site generators like Jekyll, Hugo, and Gatsby use Markdown for content. Note-taking applications like Obsidian, Notion, and Bear use Markdown as their native format. Documentation platforms like ReadTheDocs and GitBook are built entirely around Markdown files. This widespread adoption has created a network effect where learning Markdown once provides value across dozens of tools and platforms.

For web developers specifically, Markdown serves as a rapid prototyping language for content. Instead of writing verbose HTML with opening and closing tags, developers can focus on the content itself and let the Markdown processor handle the structure. The Toolsium Markdown editor provides instant visual feedback as you type, making it ideal for drafting blog posts, documentation, or README files before committing them to a repository. The Copy HTML feature lets you quickly extract the rendered markup for use in web pages or email templates.

Frequently Asked Questions