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Markdown Editor

Write Markdown with live preview — export to HTML

100% freeRuns in browserNo data sent to servers
JSONBase64URL EncodeHashRegexDiffColor
Saved to localStorage

Also try: AI Humanizer · AI Detector · Email Writer 3 free uses/day

How It Works

1

Write Markdown in the editor

Type or paste Markdown on the left side. Use the toolbar to quickly insert headings, bold, links, code blocks, tables, and more.

2

See live HTML preview

The rendered preview updates in real-time as you type, with syntax-highlighted code blocks and a table of contents for long documents.

3

Copy HTML or download

Copy the rendered HTML to clipboard, or download as a complete .html file or raw .md file. Content auto-saves to localStorage between visits.

FAQ

What Markdown syntax is supported?
Full CommonMark plus GitHub Flavored Markdown (GFM): headings, bold, italic, links, images, code blocks with syntax highlighting, tables, task lists, strikethrough, and blockquotes.
Can I export to HTML?
Yes. Click "Copy HTML" to copy the rendered HTML to your clipboard, or use "Download .html" to save a complete HTML file. You can also download the raw Markdown source as a .md file.
Is my content saved?
Your content is saved in your browser's localStorage so it persists between visits. Nothing is sent to any server.
Does it support live preview?
Yes. The preview updates in real-time as you type. You can view editor-only, preview-only, or side-by-side split view.
What does the toolbar do?
The toolbar provides quick-insert buttons for common Markdown syntax like bold, italic, headings, links, images, code blocks, tables, lists, and blockquotes. Select text first to wrap it, or click to insert at the cursor position.
Is there a fullscreen mode?
Yes. Click the fullscreen toggle button (expand icon) in the toolbar to enter distraction-free editing. Press Escape or click the button again to exit.
Is my content sent to a server?
No. Everything runs locally in your browser. Your Markdown content is auto-saved to localStorage on your device — nothing is uploaded or transmitted anywhere.
Does the editor work on mobile devices?
Yes. The editor is responsive and defaults to preview-only mode on small screens. You can switch between Editor, Preview, and Split views using the toggle buttons. The formatting toolbar works with tap gestures.
How does this compare to VS Code or Typora for Markdown editing?
VS Code and Typora are full desktop apps with file system access, extensions, and advanced features. This tool is a zero-install browser editor for quick Markdown work — drafting a README, previewing content, or exporting HTML. No download, no configuration, just open and write.
Does it support code syntax highlighting?
Yes. Code blocks with language identifiers (e.g., ```javascript) are highlighted using highlight.js with support for dozens of programming languages. The preview renders them with the GitHub Dark theme.
Can I use keyboard shortcuts?
Yes. Ctrl+B for bold, Ctrl+I for italic, Ctrl+K for link, Ctrl+H for heading, Ctrl+Q for blockquote, Alt+U for bullet list, Alt+O for ordered list, Tab for indent, and F11 for fullscreen. On Mac, use Cmd instead of Ctrl.
What other Coda One tools pair well with the Markdown Editor?
The <a href="/ai/dev/lorem">Lorem Ipsum Generator</a> can produce placeholder text in Markdown format. The <a href="/ai/seo/word-counter">Word Counter</a> helps track document length. The <a href="/ai/dev/diff">Text Diff Checker</a> can compare two Markdown drafts side by side.

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Coda One's Markdown Editor provides real-time preview of GitHub Flavored Markdown. Write documentation, READMEs, blog posts, or notes with instant visual feedback. Use the formatting toolbar to quickly insert headings, bold, italic, links, images, code blocks, tables, and more. Export to clean HTML or download as .html / .md files. Toggle fullscreen for distraction-free writing. Content auto-saves to localStorage. Free, unlimited, no signup.

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