152 words · 941 chars

Welcome to Markdown Renderer

Q: What Markdown syntax is supported?

Headings, bold, italic, strikethrough, inline code, fenced code blocks, unordered and ordered lists, task lists, blockquotes, horizontal rules, links, images, and tables - the full GitHub Flavored Markdown spec.

Write your Markdown on the left and see a live preview on the right.

Text Formatting

You can write bold, italic, ~~strikethrough~~, and inline code.

Code Blocks

function greet(name) {
  return `Hello, ${name}!`;
}

console.log(greet('World'));

Lists

Unordered:

Item one
Item two
- Nested item

Ordered:

First step
Second step
Third step

Task list:

Build the tool
Add live preview
Ship it

Blockquote

"Any sufficiently advanced technology is indistinguishable from magic."

Arthur C. Clarke

Table

Name	Role	Status
Alice	Developer	Active
Bob	Designer	Active
Charlie	Manager	Away

Link & Image

Visit GeekDas

Start editing to see your own Markdown rendered here.

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What is a Markdown Renderer?

A Markdown renderer converts plain text written in Markdown syntax into formatted HTML - headings, bold and italic text, code blocks, tables, lists, and more. Markdown was created to let writers produce structured documents using simple, readable syntax without touching HTML. This tool renders your Markdown instantly as you type, so you can see exactly how the output will look before publishing it to a blog, README, documentation site, or any platform that accepts Markdown.

Features

Live Preview

The rendered preview updates in real time as you type - no button to press. The split-pane layout keeps your source and output visible side by side, with a draggable divider to control how much space each pane gets.

GitHub Flavored Markdown (GFM)

Supports the full GFM spec on top of standard Markdown: tables, strikethrough, task lists with checkboxes, fenced code blocks, and autolinked URLs - the same dialect used by GitHub READMEs and issues.

Formatting Toolbar

One-click toolbar buttons insert Markdown syntax at the cursor: Bold, Italic, Strikethrough, H1–H3, Inline Code, Code Block, Link, Blockquote, Bullet List, Numbered List, Task Item, and Horizontal Rule.

Export & Copy

Copy the raw Markdown, copy the rendered HTML, or download a complete standalone HTML file with all styles embedded - ready to share or embed anywhere without external dependencies.

Undo / Redo Support

All edits - including toolbar insertions and Tab key indentation - are registered in the browser's native undo stack. Ctrl+Z and Ctrl+Y work exactly as expected throughout your session.

Persistent Sessions

Your Markdown is automatically saved to localStorage as you type. Refreshing or closing the tab will not lose your work - the editor restores exactly where you left off.

Frequently Asked Questions

What is the difference between standard Markdown and GitHub Flavored Markdown?

Standard Markdown covers headings, bold, italic, lists, links, images, and code blocks. GitHub Flavored Markdown (GFM) extends this with tables, strikethrough text (~~like this~~), task list checkboxes (- [ ]), fenced code blocks with language hints, and automatic URL linking. This tool supports GFM in full.

Can I use this to preview a README before pushing to GitHub?

Yes. GitHub uses GFM to render README.md files, and this tool uses the same dialect. Paste your README content into the editor to see an accurate preview of how it will look on GitHub - including tables, task lists, and code blocks.

How do I export the rendered output?

Click "Copy HTML" to copy the rendered HTML to your clipboard for pasting directly into an HTML file or CMS. Click "Download" to save a complete standalone HTML document with all prose styles embedded - no external CSS required.

Does my content get sent to a server?

No. Everything happens entirely in your browser. Your Markdown is parsed and rendered by JavaScript on your device and is never transmitted anywhere. The editor also saves your content locally in your browser's localStorage.

Why is Ctrl+Z not working after using a toolbar button?

It should work - all toolbar insertions use the browser's native execCommand API, which integrates with the undo stack. Each toolbar action is a single undoable step. If it appears to not work, make sure the editor textarea is focused first.

What Markdown syntax is supported?

Headings (# to ######), bold (**text**), italic (_text_), strikethrough (~~text~~), inline code (`code`), fenced code blocks (```lang), unordered lists (- or *), ordered lists (1.), task lists (- [ ]), blockquotes (>), horizontal rules (---), links ([text](url)), images (![alt](url)), and tables (| col | col |).