Markdown Editor
Write markdown and see rendered HTML in real time. Split-pane editor with formatting toolbar, GFM support, and instant preview.
About Markdown Editor
The Markdown Editor is a free online writing environment with a split-pane layout: the left side accepts raw markdown text and the right side renders it as formatted HTML in real time. As you type, you see headings, bold text, code blocks, tables, and blockquotes appear exactly as they will look when published — no save-and-reload cycle required. A formatting toolbar above the editor inserts the correct syntax for common elements so you can work without memorising every delimiter.
This tool is purpose-built for people who write in Markdown regularly: developers drafting README files, technical writers documenting APIs, bloggers composing posts in a static site generator, or anyone preparing content for a platform that accepts Markdown. It supports GitHub Flavored Markdown (GFM) via the marked library, which means pipe tables, fenced code blocks with language hints, ~~strikethrough~~, and task lists all render correctly — the same spec GitHub, GitLab, and most static site frameworks use.
Everything runs entirely in your browser. No text is uploaded, stored, or sent to any server at any point. You can open an existing .md file from your device, edit it, and download the updated version without your content ever leaving your machine. The tool is free, with no account, no rate limit, and no file-size cap beyond what your own browser can handle.
Key Features
Live split-pane preview
The HTML preview updates on every keystroke, letting you see headings, lists, tables, and code blocks as they render without switching tabs or saving.
GitHub Flavored Markdown support
Renders GFM extensions including pipe tables, fenced code blocks with language identifiers, strikethrough, and task lists — the same spec used by GitHub READMEs and most static site generators.
Formatting toolbar
One-click buttons for bold, italic, headings H1–H3, links, images, code blocks, blockquotes, ordered lists, unordered lists, and horizontal rules insert correct syntax without requiring you to remember delimiters.
Upload and download .md files
Open any .md, .markdown, or .txt file directly from your device to edit it in the browser, then download the updated version as a .md file — no copy-paste required.
Copy as Markdown or HTML
Two copy buttons let you grab either the raw markdown source or the fully rendered HTML output, so you can paste whichever format the target platform expects.
Live word, character, and line count
A stats bar at the bottom of the editor shows character count, word count, and line count as you type — useful when writing to a length target.
How to Use
Write Markdown
Type or paste your markdown content into the left editor pane. Use the formatting toolbar to quickly insert syntax for headings, bold, italic, links, code blocks, and more.
Preview in Real Time
As you type, the right pane instantly renders your markdown as formatted HTML, giving you immediate visual feedback on your content.
Export Your Work
Copy the raw markdown or rendered HTML to your clipboard, or download the content as a .md file for use in your projects.
Example
Markdown syntax is converted to formatted HTML in the preview pane. Headings, bold, inline code, and pipe tables all render correctly with GFM enabled.
## API Reference
Use the `fetch` function to make requests:
```javascript
const res = await fetch('/api/data');
const json = await res.json();
```
| Method | Endpoint | Description |
|--------|----------|-------------|
| GET | /api/data | Fetch all records |
| POST | /api/data | Create a record |<h2>API Reference</h2>
<p>Use the <code>fetch</code> function to make requests:</p>
<pre><code class="language-javascript">const res = await fetch('/api/data');
const json = await res.json();
</code></pre>
<table>
<thead><tr><th>Method</th><th>Endpoint</th><th>Description</th></tr></thead>
<tbody>
<tr><td>GET</td><td>/api/data</td><td>Fetch all records</td></tr>
<tr><td>POST</td><td>/api/data</td><td>Create a record</td></tr>
</tbody>
</table>Common Use Cases
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Writing and previewing README files
Software developers use this editor to draft README.md files for GitHub or GitLab repositories. The GFM preview shows exactly how headings, code blocks, and tables will appear on the repo landing page before the file is committed.
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Drafting documentation for static site generators
Tools like Hugo, Jekyll, Docusaurus, and Astro consume Markdown files. This editor lets you compose and proofread docs content with a rendered preview, then download the .md file ready for your content directory.
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Composing structured blog posts
Writers who publish to Markdown-aware platforms (Ghost, Hashnode, dev.to) can draft full posts here, verify that headings, lists, and images render as intended, and copy the markdown or HTML directly into their CMS.
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Converting markdown to HTML for embedding
When you need the HTML output rather than the source, the "Copy HTML" button gives you the rendered markup immediately. This is useful for pasting formatted content into email templates, HTML files, or rich-text fields that accept HTML.
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Editing existing .md files without a local editor
Upload a .md file from your device, make changes in the browser, and download the updated version — no IDE or local editor needed. This covers quick edits on a shared or borrowed machine.