Markdown to HTML Converter.

Markdown is a lightweight markup language created by John Gruber in 2004. It uses plain-text formatting syntax — hashtags for headings, asterisks for bold or italic, hyphens for lists — that a parser converts into semantic HTML. Developers adopt it because it is human-readable in raw form, renderable anywhere, and version-control-friendly. It is the de facto standard for README files on GitHub and NPM, static site generators, documentation platforms like Docusaurus and MkDocs, and developer blog engines. Writing in Markdown means your prose stays portable: the same .md source file can render as a GitHub README, a Confluence page, or a Hugo blog post without modification.

Standard Markdown (the original CommonMark spec) covers basic elements: headings, paragraphs, bold, italic, links, images, code spans, blockquotes, and unordered or ordered lists. GitHub Flavored Markdown (GFM) is a strict superset maintained by GitHub that adds several developer-critical extensions. GFM introduces pipe-delimited data tables, task list checkboxes (- [ ] and - [x]), strikethrough text via double tildes (~~text~~), fenced code blocks with language identifiers for syntax highlighting, and automatic URL hyperlinking. It also specifies tighter rules around HTML block rendering. Any documentation written for GitHub, npm, or most modern static site generators will use GFM syntax, making GFM compatibility a hard requirement for a real-time markdown to html converter online.

After typing or pasting your Markdown into the left input panel, click the "Raw HTML" tab in the right output panel. The panel will switch from the visual preview to the exact semantic HTML string produced by the GFM parser — including all <h1>, <p>, <code>, <table>, and <pre> tags. Click the "Copy HTML" button to push the raw markup directly to your clipboard. This output is ready to inject into a CMS rich-text field, an email template builder, a legacy codebase, or any context where you need clean semantic HTML rather than rendered typography.

Yes. This markdown to html converter is architected as a fully static, client-side application. The marked.js parsing library and DOMPurify sanitization engine are loaded from a CDN on page load and then execute entirely within your browser's JavaScript sandbox. No keystroke, no document fragment, and no byte of your content is transmitted to any server. There are no backend API endpoints, no WebSocket connections sending your text off-device, and no server-side logging of input. Your active Markdown draft is persisted only to your own browser's localStorage for session resilience. You can verify this by opening your browser's Network tab — you will see zero POST or PUT requests after the initial page assets load.

Yes. The parser supports GitHub Flavored Markdown fenced code blocks. Wrap your code in triple backticks and add a language identifier on the opening fence (e.g., ```javascript, ```python, ```sql, ```bash). The renderer will apply semantic class annotations to the output HTML compatible with standard highlight.js or Prism.js token structures, producing clean, developer-friendly syntax-highlighted output in the visual preview. This makes the tool ideal for writing technical blog posts, API documentation, and tutorials where legible code snippets are a first-class concern.

The core parsing and rendering engine — marked.js for GFM conversion and DOMPurify for HTML sanitization — is loaded via CDN on the initial page visit. Once those scripts are cached by your browser, the entire convert md to html workflow functions without any active internet connection. Your browser's localStorage auto-save also operates fully offline. This makes the workspace reliable in low-connectivity environments such as flight mode, corporate networks with restricted egress, or local development setups that are intentionally air-gapped from the public internet.