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DevUtil

Markdown Preview - Live Markdown Editor & Renderer

Markdown
Preview

About the Markdown Preview Tool

Markdown is the go-to format for developer documentation, README files, blog posts, and technical writing. But raw Markdown can be hard to visualise, especially when you are working with complex nested lists, tables, or fenced code blocks. This live preview tool lets you type or paste Markdown on the left and immediately see the formatted output on the right, so you can catch formatting mistakes before you commit or publish.

The tool uses the marked library to parse GitHub Flavored Markdown (GFM), which means you get support for tables, strikethrough, task lists, and fenced code blocks out of the box. The rendered HTML is available for one-click copying, making it easy to drop formatted content into emails, CMS editors, or static site templates.

How to Use the Markdown Preview

Start typing Markdown in the left editor pane. The right pane updates in real time as you type, showing the rendered HTML output. You can also paste an existing Markdown document to preview it. When you are happy with the result, click the Copy HTML button to grab the raw HTML for use elsewhere.

Features

  • Real-time preview. The rendered output updates instantly as you type with no manual refresh needed.
  • GitHub Flavored Markdown. Full support for GFM features including tables, strikethrough, and fenced code blocks.
  • One-click HTML copy. Copy the rendered HTML to your clipboard for pasting into other tools.
  • Safe rendering. Raw HTML in the input is escaped to prevent XSS issues when previewing untrusted content.
  • Client-side only. All processing runs in your browser. No data is sent to any server.

Common Use Cases

Developers use Markdown previews when writing README files for GitHub repositories, drafting documentation for open-source projects, composing blog posts for static site generators like Astro, Hugo, or Jekyll, and preparing technical specifications. Content writers use it to format articles before pasting into a CMS. This tool saves you from the edit-commit-check cycle by giving you instant visual feedback on your Markdown formatting.

Frequently Asked Questions

What is Markdown?
Markdown is a lightweight markup language created by John Gruber in 2004. It uses plain text formatting syntax (like # for headings, ** for bold, and - for lists) that can be converted to HTML. It is widely used for README files, documentation, blog posts, forum comments, and static site generators.
Does this tool save my Markdown?
No. All processing happens in your browser. Nothing is sent to a server, and nothing is stored after you close the tab. If you need to keep your work, copy the Markdown text or the generated HTML before leaving the page.
Can I copy the generated HTML?
Yes. Click the Copy HTML button above the preview pane to copy the rendered HTML to your clipboard. You can paste it directly into any HTML document, email template, or CMS that accepts raw HTML.
What Markdown features are supported?
This tool supports GitHub Flavored Markdown (GFM), which includes headings, bold, italic, strikethrough, ordered and unordered lists, links, images, code blocks with syntax hints, blockquotes, horizontal rules, and tables.
Can I use raw HTML inside my Markdown?
For security reasons, raw HTML tags in the Markdown input are escaped and displayed as plain text rather than being rendered. This prevents cross-site scripting (XSS) issues when previewing untrusted content.