Markdown to HTML

The Markdown to HTML Converter turns Markdown source - a README, a changelog, a blog draft, a set of release notes - into the HTML a browser or CMS renders. Paste or type Markdown on the left, and you get semantic HTML on the right: headings become h1–h6, fenced code becomes pre and code with a language class, lists become ul and ol, and GitHub extensions such as tables, task lists and strikethrough are handled the way GitHub renders them.

Markdown is a plain-text writing format, not a display format. Anywhere it appears on a page - a docs site, a static blog, an email template, a CMS field that only accepts HTML - something has to compile it first. Doing that in the browser, rather than pulling a parser into your build or pasting your draft into a service you do not control, is the fastest way to get the markup out and move on.

Everything runs client-side. The converter is a hand-written parser, not a wrapper around a remote API, so your unpublished posts, internal docs and private release notes never leave the page. Toggle GitHub Flavored Markdown, heading anchor IDs, single-newline line breaks and raw HTML pass-through, then copy the HTML, download an .html file, or grab a generated table of contents.

A short worked example shows what you get when you convert Markdown to HTML here. Paste `# My Project`, then `## Install`, then a two-row task list `- [x] Done` and `- [ ] Todo`. The output is `<h1 id="my-project">My Project</h1>`, `<h2 id="install">Install</h2>` and a `<ul class="task-list">` whose items start with disabled checkbox inputs. Tick Full document and the same body is wrapped in a doctype with `<title>My Project</title>`. It is a free Markdown to HTML converter, no signup, and it converts as you type.

Markdown permits raw HTML inline, which makes the safety question real rather than theoretical: a document containing a script tag is valid Markdown, and a converter that passes it through produces HTML that will run when rendered. Output here is escaped by default for that reason, so a Markdown file from an untrusted source cannot smuggle tags into your page. Links are a separate case: a `javascript:` link in the Markdown keeps that href in the copied HTML, and only the preview pane rewrites it, so sanitise the output before publishing Markdown you did not write. If you are converting your own content and want raw HTML preserved, that is a deliberate choice rather than the default. The other thing to know is that Markdown has no single specification. GitHub Flavored Markdown is implemented here, which covers tables, task lists, strikethrough and fenced code, and those are extensions rather than part of the original syntax, so a strict CommonMark renderer will not show them.