Markdown to HTML Converter

Convert Markdown to clean, semantic HTML instantly. Supports GFM tables, code blocks, and task lists. Free, private, no signup.

Type or paste Markdown on the left. Toggle between the raw HTML source and a live rendered preview on the right.

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How It Works

  1. Paste your Markdown

    Type or paste any Markdown — including GFM tables, fenced code blocks, task lists, and strikethrough — into the left-hand input pane. The conversion starts the moment you stop typing.

  2. Switch between source and preview

    Use the 'HTML Source' tab to inspect the raw markup and the 'Preview' tab to see a rendered view of how the HTML will look in a browser. Both views update live as you edit.

  3. Copy or download the HTML

    Click 'Copy HTML' to put the sanitised markup on your clipboard instantly, or hit 'Download .html' to save a file. The output is ready to paste into any webpage, CMS, or email template.

Frequently Asked Questions

Why Convert Markdown to HTML?

Markdown was designed as a human-readable shorthand for HTML, making it the natural source format for web content. Converting Markdown to HTML unlocks that content for the browser: you can embed it directly in a webpage, feed it into a CMS, style it with CSS, or use it as the body of an HTML email. Unlike Markdown, HTML is universally understood by every browser, email client, and web-based editor.

Key Use Cases

  • Static site generators: Many generators (Astro, Hugo, Next.js) accept Markdown source files, but sometimes you need the raw HTML output to inject into a layout or pass to a headless CMS.
  • Email campaigns: HTML emails support rich formatting. Writing the draft in Markdown and converting to HTML gives you clean, consistent markup without hand-crafting every tag.
  • Documentation portals: Convert your README or wiki pages to HTML snippets for embedding in internal portals or developer docs sites.
  • Rich-text editors: Tools like Notion, Confluence, and Contentful accept HTML paste. A Markdown-to-HTML conversion bridges the gap between your writing tool and the platform.

Sanitised, Safe Output

Raw Markdown-to-HTML converters can inadvertently pass through inline HTML that contains scripts or event handlers — a serious XSS risk if the output is rendered on a public page. This tool runs every conversion through rehype-sanitize, which enforces a strict allowlist of safe tags and attributes. You get the full expressive power of semantic HTML without any security surprises.

GitHub Flavored Markdown Support

Standard CommonMark covers the essentials, but modern technical writing relies heavily on GFM extensions. This converter fully supports pipe tables (rendered as <table> elements), fenced code blocks with optional language labels, task-list checkboxes, strikethrough, and auto-linked URLs. The output mirrors what you would see in a GitHub README or a GitLab wiki page.

How the Pipeline Works

Under the hood the tool uses the unified ecosystem: remark-parse turns your Markdown into an MDAST, remark-gfm adds GFM node support, remark-rehype converts the MDAST to an HAST (HTML AST), rehype-sanitize scrubs the tree, and rehype-stringify serialises the final HTML string. The whole pipeline runs synchronously in your browser — nothing is sent to a server.