Markdown Preview & Editor

Free online Markdown Preview & Editor. Upload .md files or type with instant GitHub Flavored Markdown preview, syntax highlighted code blocks, table formatting, and HTML export.

Markdown Preview & Editor

README.md

Real-time GitHub Flavored Markdown (GFM) renderer with code highlight, table formatting, and HTML export.

Presets:
Markdown Source
Drag & drop .md file to load
Rendered Preview
GitHub Flavored Markdown
Words: 274
Characters: 1,926
Lines: 81
Read time: ~2 min
Save draft on this device

Optional. One draft per tool, stored in this browser only. Saving replaces the previous copy; restoring replaces the current content. Do not use on a shared device. Clearing browser data removes it.

Developer Scenario: Reviewing and Polishing an Open-Source GitHub README.md

An engineer drafting documentation for an open-source library wants to verify how badges, API tables, code snippets, and task checklists render before pushing to GitHub.

Raw Markdown Input# QuickStart\n\nInstall dependencies:\n```bash\nnpm install usefulgo-sdk\n```\n\n### Checklist\n- [x] Configure API Keys\n- [ ] Deploy to Production
Live Preview OutputHeader 1 with anchor, styled bash terminal block with copy button, and interactive task checklist.
Export ResultOne-click standalone styled HTML file ready for documentation hosting or email distribution.

💡 The developer spots formatting errors in tables and code fences instantly without having to commit and push repeatedly to remote Git branches.

How to use Markdown Preview & Editor

  1. 1

    Type or paste Markdown into the editor, or drag and drop any .md, .markdown, or .txt file directly onto the canvas.

  2. 2

    Use the formatting toolbar to quickly insert headings, bold/italic text, code blocks, tables, task lists, or blockquotes.

  3. 3

    Switch between Split View, Preview Only, or Editor Only, and toggle between GitHub Light and GitHub Dark themes.

  4. 4

    Export your formatted document as clean standalone HTML, download your .md file, or copy rendered HTML to your clipboard.

Why use this tool?

Full GitHub Flavored Markdown (GFM)

Complete support for tables, strikethrough, automated linkification, task checklists (- [x]), and fenced code blocks.

100% Client-Side Privacy & Drag-and-Drop

Your documents are rendered 100% locally in your web browser. No Markdown content or uploaded files ever touch an external server.

Standalone HTML Export & One-Click Copy

Download a self-contained HTML file styled with modern typography, or copy raw HTML/Markdown directly into your clipboard.

Real-time Word, Character & Reading Stats

Monitor your document length with live word counts, character counts, line tallies, and estimated reading times.

Frequently asked questions

Can I open and preview an existing .md file from my computer?

Yes! Click the "Open .md File" button or drag and drop any .md, .markdown, or .txt file directly onto the editor. The file will load instantly into the editor and preview pane.

Does this tool support GitHub tables and task checklists?

Yes. The previewer includes remark-gfm support, which renders GitHub-style tables, task checklists (- [ ] / - [x]), strikethroughs (~~text~~), and URLs automatically.

How do I export the rendered Markdown to HTML?

Click "Export HTML" in the top action bar to download a standalone .html file complete with embedded modern responsive styles, or click "Copy HTML" to copy the generated markup to your clipboard.

Is my document private and safe from server logging?

Absolutely. All parsing, rendering, and file processing happen entirely inside your web browser. Nothing is ever sent to or stored on any server.

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