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ToolText Pro

Free Online Text Tools for Everyone

Markdown to HTML Converter

Convert Markdown to HTML instantly with our free online tool. Supports GitHub Flavored Markdown, syntax highlighting, tables, emoji, and more. 100% client-side processing for complete privacy and security.

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What is Markdown?

Markdown is a lightweight markup language created by John Gruber in 2004. It's designed to be easy to read and write in plain text format while being easily convertible to HTML. Markdown has become the de facto standard for documentation, README files, blog posts, and online discussions.

Popular platforms using Markdown include GitHub, Reddit, Stack Overflow,Discord, Slack, and countless content management systems. It's favored by developers, writers, and content creators for its simplicity and portability.

Why Convert Markdown to HTML?

For Websites & Blogs

Many content creators write in Markdown for its simplicity, then convert to HTML for publishing on websites. This workflow separates content creation from presentation, making it easier to maintain and update.

For Documentation

README files and technical documentation are often written in Markdown. Converting to HTML allows you to publish docs to static sites, wikis, or internal knowledge bases with proper styling.

For Email Newsletters

Write your newsletter content in Markdown, then convert to HTML for email campaigns. This ensures consistent formatting across email clients while keeping your source files clean and readable.

For Static Site Generators

Tools like Jekyll, Hugo, and Gatsby use Markdown as input. Understanding the HTML output helps you customize styling and troubleshoot rendering issues in your static site builds.

Key Features of Our Converter

GitHub Flavored Markdown (GFM)

Full support for tables, task lists, strikethrough, autolinks, and emoji. Perfect for converting GitHub READMEs.

Syntax Highlighting

Automatic code highlighting for 50+ programming languages including JavaScript, Python, Java, CSS, SQL, and more.

Real-Time Preview

See your HTML render instantly as you type. Switch between preview and code view to see the raw output.

File Upload & URL Import

Upload .md files or import directly from URLs (great for GitHub raw files). Supports files up to 10MB.

Customizable Output

Choose between fragment, minimal wrapper, or full HTML document. Configure indentation, formatting, and SEO tags.

100% Private & Secure

All conversion happens in your browser. Your documents never leave your device. We use DOMPurify for XSS protection.

Supported Markdown Syntax

CommonMark (Standard Markdown)

  • Headings (# through ######)
  • Emphasis: **bold**, *italic*, ***bold+italic***
  • Links: [text](url) and images: ![alt](url)
  • Lists: ordered, unordered, and nested
  • Code: `inline` and fenced code blocks
  • Blockquotes and horizontal rules

GitHub Flavored Markdown

  • Tables with column alignment
  • Task lists: - [x] and - [ ]
  • Strikethrough: ~~text~~
  • Automatic URL linking
  • Emoji shortcodes: :smile: → 😄

Extended Features

  • Footnotes: [^1] and [^1]: definition
  • Subscript: H~2~O
  • Superscript: x^2^
  • Highlighting: ==marked text==
  • Heading anchors for linking

Markdown to HTML Best Practices

  1. Use semantic headings - Start with H1 (#) for your main title and maintain proper hierarchy (H1 → H2 → H3). This improves SEO and accessibility.
  2. Specify language for code blocks - Use ```javascript instead of just ``` to enable proper syntax highlighting.
  3. Add alt text to images - Always use ![descriptive alt](url) for better accessibility and SEO.
  4. Use tables sparingly - Markdown tables work best for simple data. For complex tables, consider writing HTML directly.
  5. Test your output - Always preview the HTML to ensure it renders as expected, especially for complex nested structures.
  6. Choose the right output format - Use "Fragment" for embedding in existing pages, "Full Document" for standalone files.

Frequently Asked Questions

FAQ

Markdown is a lightweight markup language created by John Gruber in 2004. It uses plain text formatting syntax that can be easily converted to HTML. Markdown is widely used for documentation, README files, blog posts, and comments on platforms like GitHub, Reddit, and Stack Overflow.

Simply paste or type your Markdown text into the input area, and the HTML output will be generated automatically in real-time. You can then copy the HTML code or download it as a file. Our converter supports all standard Markdown syntax plus GitHub Flavored Markdown (GFM) extensions.

Yes! Our converter fully supports GitHub Flavored Markdown including tables, task lists, strikethrough text, automatic URL linking, and emoji shortcodes. You can also enable additional features like footnotes, subscript, superscript, and highlighting through the settings panel.

Yes, this tool is completely free to use with no limitations. There are no premium features, no account required, and no usage limits. All conversion happens locally in your browser, so your documents remain private and secure.

Absolutely. All Markdown to HTML conversion happens 100% client-side in your browser. Your documents never leave your device, and we don't store, track, or transmit any of your content to our servers. The tool works completely offline once loaded.

Yes! You can customize multiple aspects of the HTML output including indentation style (2 spaces, 4 spaces, or tabs), output format (fragment, minimal wrapper, or full document), syntax highlighting theme for code blocks, table styling options, and whether to include SEO meta tags.

Our converter supports syntax highlighting for 50+ programming languages including JavaScript, Python, Java, C++, HTML, CSS, SQL, Bash, TypeScript, Go, Rust, PHP, Ruby, and many more. The language is auto-detected from your code fence (```language) or you can specify it manually.

Yes! You can upload .md, .markdown, or .txt files directly by clicking the Upload button or by dragging and dropping files into the input area. Files up to 10MB are supported. You can also import Markdown from URLs, which is useful for fetching README files from GitHub.

Yes, our converter fully supports Markdown tables with column alignment (left, center, right). The HTML output includes proper table structure with thead and tbody elements, and you can enable responsive table wrappers and styling options through the settings.

Yes! Click the Download button to save your converted HTML as a .html file. You can choose to download just the content fragment, a minimal HTML document, or a complete HTML page with meta tags and styling. The filename will be based on your document's first heading or the current timestamp.

**Fragment** outputs only the converted HTML content without any wrapper (useful for embedding in existing pages). **Minimal Wrapper** includes basic DOCTYPE and meta tags. **Full Document** generates a complete, standalone HTML page with proper structure, meta tags, and optional SEO elements.

Yes, once the page is loaded, all conversion happens in your browser without requiring an internet connection. The only exception is if you use the Import from URL feature, which requires internet access to fetch the remote Markdown file.

Yes, you can use this tool for any purpose including commercial projects. The HTML output you generate is yours to use however you like, with no attribution required. However, please note that any code or content you convert must comply with its original license.

We support **CommonMark** (standard Markdown), **GitHub Flavored Markdown (GFM)** including tables, task lists, strikethrough, and autolinks. We also support **footnotes**, **definition lists**, **subscript** (H~2~O), **superscript** (x^2^), **highlighting** (==marked text==), and **emoji** (:smile:). You can enable or disable these features in the settings.

Line numbers can be enabled in the Settings panel under 'Code Highlighting Options'. When enabled, all code blocks in your HTML output will display line numbers, making it easier to reference specific lines of code in documentation or tutorials.

Yes! We use DOMPurify to sanitize the HTML output and protect against XSS (Cross-Site Scripting) attacks. This ensures that any HTML tags in your Markdown are properly cleaned and safe to use on websites. Malicious scripts are automatically removed while preserving legitimate HTML elements.