Markdown Editor
Write Markdown on the left, see the rendered HTML on the right. Auto-saves as you type.
How to Use the Markdown Editor
This is a fully client-side online Markdown editor with a real-time live preview. Type Markdown in the left pane and the rendered HTML appears instantly on the right. The toolbar above the editor inserts common formatting tokens for you, so you do not have to memorize the syntax. Select a block of text and click the toolbar button to wrap or transform it; click without a selection and a small placeholder snippet is inserted at the cursor.
Your work is automatically saved to your browser's local storage every time you stop typing for a moment, so you can close the tab and come back later without losing anything. Use the action buttons to download your work as a raw .md file, export a complete styled .html document, or copy the rendered HTML to your clipboard. Nothing is uploaded to a server. On phones and tablets, switch between the editor and the preview using the tab buttons at the top.
Why Use Markdown
Markdown is a lightweight plain-text formatting language created by John Gruber in 2004. Its biggest advantage is portability. A Markdown document is just a text file, so it opens in any editor on any operating system, will still be readable in fifty years, and plays well with version control tools like Git. Major platforms including GitHub, GitLab, Reddit, Discord, Slack, Notion, Obsidian, and most static site generators speak Markdown natively. Once you learn the basics, the same skill applies everywhere.
Compared to a word processor, Markdown is also fast to write. You never lift your hands off the keyboard to click a formatting menu — a couple of asterisks or a hash mark is enough. Because the source is plain text, diffs in pull requests are clean and reviewable, automated tools can lint and transform the content, and the file size stays tiny. For technical writing, README files, blog posts, documentation, and personal notes, Markdown hits the sweet spot between expressiveness and simplicity. This editor lets you compose Markdown comfortably and convert it to HTML the moment you are ready to publish.
Markdown Cheat Sheet
A quick reference for the most common Markdown syntax. Try any of these examples by pasting them into the editor above.
| Syntax | Result |
|---|---|
# Heading 1 | Heading 1 |
## Heading 2 | Heading 2 |
**bold** | bold |
*italic* | italic |
~~strikethrough~~ | |
[link](https://example.com) | link |
 | image embed |
`inline code` | inline code |
```code block``` | fenced code block |
> blockquote | indented quote line |
- item | unordered list item |
1. item | ordered list item |
--- | horizontal rule |
| col | col | | table row |
Frequently Asked Questions
Is my content saved on a server?
No. The editor runs entirely in your browser. Your Markdown is parsed locally with the marked library and sanitized with DOMPurify before being shown in the preview pane. Auto-save uses your browser's local storage, which never leaves your device. You can safely use this tool with confidential notes, drafts, or work-in-progress writing.
Which Markdown flavor is supported?
The editor uses the marked library configured for GitHub Flavored Markdown (GFM). That includes standard CommonMark plus tables, fenced code blocks, task lists, autolinks, and strikethrough. If you write Markdown that renders correctly on GitHub or GitLab, it will render the same way here.
Can I export styled HTML I can publish?
Yes. The "Download .html" button packages the rendered HTML inside a complete standalone document with a small embedded stylesheet — clean typography, code blocks, blockquotes, and tables. You can open it directly in any browser, attach it to an email, or paste the body into a CMS. Use "Copy HTML" to grab just the inner HTML for embedding.
Does it support tables, code blocks, and task lists?
Yes. GitHub-style pipe tables are rendered as real HTML tables. Fenced code blocks (using triple backticks) render with a dark monospaced style. Task list syntax such as - [ ] todo and - [x] done renders as checkboxes. Inline code wrapped in single backticks renders with a subtle background highlight.
Is this Markdown editor free and ad-supported?
Yes. The editor is free to use without any sign-up. Display ads from Google AdSense help cover hosting costs, but they are placed in the sidebars and below the editor so they never block your writing area. There are no usage limits, no watermarks, and no premium tiers.
Why is the preview sanitized?
Markdown allows raw HTML, which means a malicious snippet could in principle embed scripts. To keep you safe, every render is passed through DOMPurify before it reaches the preview pane. Inline images and links still work normally — only dangerous tags such as <script> are stripped.