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Markdown to HTML Converter

Convert Markdown to sanitized HTML with live preview. Supports GFM tables, code blocks, headings, and lists. Extracts document metadata like heading structure, link count, and image count. Runs entirely in your browser — your data never leaves your machine.

markdown html converter gfm sanitizer

Published May 31, 2026

All interactive tools run entirely in your browser. Your data never leaves your device.

How It Works

Paste or type Markdown content and the tool converts it to HTML in real time using a standards-compliant parser. The output is sanitized by default to prevent XSS attacks, making it safe to embed. The tool also extracts document metadata — headings, link count, image count, and code block count.

Features

  • Live conversion: Markdown to HTML as you type
  • GFM support: tables, strikethrough, task lists, autolinks
  • Sanitized output: DOMPurify removes XSS vectors by default
  • Heading extraction: lists all headings with levels and generated IDs
  • Document stats: link count, image count, code block count, input/output sizes
  • Toggleable options: sanitization, header IDs, GFM line breaks
  • 5 examples: basic formatting, headings & lists, code blocks, GFM table, full document
  • Private: all processing runs in your browser — no data transmitted

Use Cases

  • Converting Markdown README files to HTML for embedding
  • Previewing Markdown content before publishing
  • Generating sanitized HTML from user-submitted Markdown
  • Analyzing document structure and metadata