Markdown Editor
Write markdown and see a live HTML preview instantly. GFM support, toolbar formatting, full-screen mode — all in your browser.
# Heading 1
## Heading 2
### Heading 3
**bold**
*italic*
~~strikethrough~~
[text](url)
- unordered item
1. ordered item
- [x] task item
`inline code`
```lang ... ```
> blockquote
--- (horizontal rule)
| table | cols |
What is a Markdown Editor?
A markdown editor is an online tool for writing and previewing Markdown — the lightweight markup language created by John Gruber. Markdown lets you format text using simple characters: # for headings, ** for bold, * for italic, - for lists, and more. This live markdown preview editor shows you the rendered HTML output as you type, making it easy to write README files, documentation, blog posts, and notes.
Why Use a Live Markdown Preview?
- Instant feedback: See your formatted output in real time as you type, catching formatting errors immediately.
- No installation: Runs entirely in your browser — no extensions, plugins, or desktop apps required.
- GitHub-ready: Full GFM (GitHub Flavored Markdown) support including tables, task lists, strikethrough, and fenced code blocks.
- Export options: Copy rendered HTML for pasting into websites or download your content as a .md file for use anywhere.
- Private & secure: All processing happens client-side. Your content never leaves your device.
Supported Markdown Syntax
| Syntax | Output | Notes |
|---|---|---|
# Heading | Heading 1 | Supports h1 through h6 |
**bold** | bold | Double asterisks |
*italic* | italic | Single asterisks |
~~strike~~ | GFM strikethrough | |
[text](url) | Link | Inline link format |
 | Image | Inline image format |
- item | Unordered list | Also supports * and + |
1. item | Ordered list | Numbered list items |
- [x] task | Task list | GFM task checkboxes |
`code` | code | Inline code |
```js ... ``` | Code block | Fenced with language label |
> quote | Blockquote | Nested blockquotes supported |
| a | b | | Table | GFM pipe tables |
--- | Horizontal rule | Three or more dashes |
Frequently Asked Questions
What is a markdown editor?
A markdown editor is a tool that lets you write text using Markdown syntax and see the formatted output in real time. Markdown is a lightweight markup language that uses simple characters like # for headings, ** for bold, and - for lists to format text without HTML. This editor shows a live preview of your Markdown as rendered HTML side by side.
How do I use this live markdown preview?
Type or paste Markdown into the left editor panel. The right panel instantly renders a live HTML preview. Use the toolbar buttons to insert formatting like bold, italic, headings, links, images, code blocks, lists, blockquotes, tables, and horizontal rules. You can also copy the rendered HTML or download your Markdown as a .md file.
What is GitHub Flavored Markdown (GFM)?
GitHub Flavored Markdown (GFM) extends standard Markdown with features used on GitHub: tables with pipe syntax, strikethrough with ~~tildes~~, task lists with [ ] checkboxes, and fenced code blocks with language labels for syntax highlighting. This editor fully supports all GFM features.
Can I export the output as HTML?
Yes. Click the 'Copy HTML' button to copy the rendered HTML to your clipboard. You can also download the raw Markdown as a .md file using the 'Download .md' button. Both options make it easy to use your content in websites, documentation, or other platforms.
Does this editor support code blocks with syntax highlighting?
Yes. Use fenced code blocks with triple backticks and an optional language identifier (e.g., ```javascript). The preview renders code blocks with a language label and monospace formatting. This is especially useful for writing technical documentation and README files.
Is my data safe in this markdown editor?
Absolutely. This markdown editor runs entirely in your browser using JavaScript. No data is sent to any server. Your content never leaves your device, making it completely safe for editing private or sensitive documents.
What markdown syntax does this editor support?
This editor supports the full CommonMark specification plus GitHub Flavored Markdown extensions: headings (# to ######), bold (**text**), italic (*text*), strikethrough (~~text~~), links, images, ordered and unordered lists, task lists, blockquotes, code blocks, inline code, tables, and horizontal rules.
Related Tools
- HTML to Markdown Converter — Convert HTML markup to clean Markdown syntax with live preview.
- Regex Tester — Test and debug regular expressions online with real-time highlighting.