Free Markdown Editor Online

What the Markdown Editor Does

Markdown is the writing format behind GitHub READMEs, developer documentation, static site generators, and countless blogs. But writing it without a preview means constantly switching between your text editor and a browser to check how things actually look. This tool eliminates that friction entirely.

The Markdown Editor gives you a full-featured writing environment with a live side-by-side preview that updates as you type. It supports GitHub Flavored Markdown (GFM) out of the box, including tables, task lists, strikethrough, fenced code blocks, and syntax highlighting for 15+ programming languages. When your document is ready, export it as a raw .md file, a styled HTML page, or a print-ready PDF — all without leaving your browser.

Your content runs 100% client-side. Nothing is uploaded to a server. Nothing is processed remotely. Your markdown stays in your browser’s memory, auto-saved to localStorage so you never lose work between sessions.

Whether you are drafting a README, writing a blog post, or formatting technical documentation, this editor handles the full workflow from first draft to finished export.

How It Works

Start writing. The left pane is a CodeMirror 6-powered editor with markdown syntax highlighting built in. Heading markers, bold delimiters, link brackets, and code spans are all visually distinguished as you type, so you can see structure at a glance without waiting for the preview.

Use the formatting toolbar. Across the top, a 16-button toolbar is grouped into four sections:

• Text formatting — B (Bold), I (Italic), S (Strikethrough), and backtick for inline code. Select text first and the formatting wraps around it, or click to insert placeholder markers.
• Headings — H1, H2, and H3 buttons insert the corresponding heading prefix at the start of the current line.
• Lists and quotes — Unordered list, ordered list, task list checkbox, and blockquote. Each inserts the appropriate line prefix.
• Insert elements — Link, Img, code block (triple backtick), Table (a ready-made 3-column template), and horizontal rule.

Watch the preview update. The right pane renders your markdown in real time with a short debounce for smooth performance. Code blocks get full syntax highlighting courtesy of highlight.js, supporting JavaScript, TypeScript, Python, Bash, HTML, CSS, JSON, YAML, SQL, Rust, Go, Java, C/C++, Dockerfile, and Markdown itself. Tables render with alternating row shading, and task lists appear as interactive checkboxes.

Use keyboard shortcuts. Press Ctrl+B (or Cmd+B on Mac) for bold and Ctrl+I (Cmd+I) for italic. Standard undo, redo, and tab indentation work as expected.

Export your finished document. The action bar below the editor offers six options: Copy MD and Copy HTML send content to your clipboard. Download .md and Download HTML save files to your device (the HTML export includes embedded styles so it renders identically to the preview). Download PDF opens your browser’s print dialog, where you can choose “Save as PDF” for a clean, well-formatted document with the editor UI hidden automatically.

Import existing files. Click Import .md to load any .md, .txt, or .markdown file from your device. The file is read locally and replaces the current editor content after a confirmation prompt.

Track your progress. A stats bar displays your word count, character count, and estimated reading time in real time. An “auto-saved” indicator confirms that your content is being persisted to localStorage every 500 milliseconds.

On mobile devices, the editor and preview switch to a tabbed layout with Edit and Preview toggle buttons so you can work comfortably on smaller screens.

Why Use Our Markdown Editor

No signup, no account, no limits. Open the page and start writing. There is no registration wall, no character cap, and no session timeout.

True privacy. Every operation — rendering, syntax highlighting, auto-save, and export — happens entirely in your browser using JavaScript. Your content is never transmitted to any server. Close the tab and it is gone, or come back later to find it restored from localStorage.

Professional-grade editor. CodeMirror 6 provides the same editing engine used by major code platforms. You get line numbers, markdown-aware syntax coloring, selection highlighting, and smooth scrolling in a lightweight package.

GFM compatibility. If your markdown works on GitHub, it works here. Tables, task lists, strikethrough, autolinks, and fenced code blocks are all supported through the marked parser with GFM mode enabled.

Complete export suite. Most online editors let you copy text. This one gives you five distinct export paths: clipboard (markdown or HTML), file download (markdown or HTML with embedded styles), and browser-native PDF printing.

Works offline. Once the page loads, no further network requests are needed. You can disconnect from the internet and keep writing, formatting, and exporting without interruption.

Use Cases

Drafting GitHub READMEs. Write your project README with live preview of how headings, code blocks, badges, and tables will render. Export as .md and commit directly to your repository.

Writing blog posts. Authors using static site generators like Astro, Hugo, or Jekyll can draft posts with full GFM support, verify formatting in real time, and download the finished .md file ready for their content directory.

Preparing technical documentation. Document APIs, configuration guides, or runbooks with fenced code blocks in the correct language. The syntax highlighting preview confirms readability before you publish.

Quick format conversion. Paste markdown into the editor and use Copy HTML to grab clean, rendered HTML for pasting into WordPress, Ghost, Notion, email templates, or any CMS that accepts HTML input.

Creating printable documents. Write meeting notes, project proposals, or checklists in markdown and use the PDF export to produce a clean, styled document suitable for sharing with non-technical stakeholders.

Learning markdown syntax. New to markdown? Use the Load Sample button to populate the editor with a document demonstrating headings, bold, italic, strikethrough, code blocks, tables, task lists, blockquotes, and horizontal rules. Edit the sample and watch how changes affect the preview in real time.

Tips and Best Practices

Specify languages on code blocks. Always add the language identifier after the opening triple backticks (for example, ```python or ```json). This activates syntax highlighting in the preview and in your exported HTML, making code blocks dramatically more readable.

Use the toolbar for complex inserts. The Table button generates a ready-made 3-column, 2-row template that you can extend by adding pipes and dashes. The Link button pre-selects the URL portion so you can paste over it immediately. These save time compared to typing the syntax from memory.

Leverage auto-save for long writing sessions. Your content is saved to localStorage every half second. If your browser crashes or you accidentally close the tab, simply reopen the page and your work will be restored automatically. For permanent backups, periodically use Download .md to save a local copy.

Export styled HTML for CMS publishing. The Download HTML option produces a self-contained HTML file with embedded CSS that mirrors the preview pane. This is useful when you need a standalone document that renders correctly without any external dependencies.

Preview on mobile before sharing. Switch to the Preview tab on your phone to see exactly how your document renders on smaller screens. Tables, code blocks, and images will reflow to fit, giving you confidence that your content looks good on every device before you publish or share it.