Write Markdown on the left and see the rendered HTML preview update live on the right — supports headings, bold, italic, links, lists, and code.
Headings (#, ##, ###), bold (**text**), italic (*text*), inline code (`code`), links ([text](url)), blockquotes (> text), horizontal rules (---), and basic lists (* item).
Yes, click "Copy HTML" to copy the rendered HTML output, ready to paste into a webpage or email.
This covers the most commonly used Markdown syntax for quick previewing. For advanced features like tables or nested lists, a dedicated Markdown editor may be needed.
This tool lets you write Markdown — a lightweight text formatting syntax — and see the rendered HTML output update live as you type, side by side. It's useful for drafting README files, documentation, forum posts, or any content destined for a platform that uses Markdown.
Markdown is a simple, readable plain-text syntax for formatting documents, designed so that even the unformatted source text remains easy to read. Instead of clicking buttons in a rich text editor, you type simple symbols — like **text** for bold or # Heading for a title — and the Markdown gets converted into properly formatted HTML. It's the standard formatting syntax on platforms like GitHub, many blogging tools, Reddit, and countless documentation systems.
# H1, ## H2, ### H3**bold text***italic text*`code`[link text](https://example.com)> quoted text---* Markdown's plain-text syntax is easy to write but not always intuitive to read in raw form, especially for people unfamiliar with it. Previewing your Markdown as rendered HTML before publishing helps catch formatting mistakes — like a missing closing asterisk that leaves text unintentionally italicized, or a heading level that doesn't look right — before your content goes live on GitHub, a blog, or documentation site.
All Markdown parsing and rendering happens directly in your browser using JavaScript — your content is never sent to a server.
Every keystroke in the editor triggers an input event that re-runs the Markdown-to-HTML conversion on the full text and replaces the contents of the preview pane. The converter processes the text line by line first, matching patterns for headings, blockquotes, horizontal rules, and list items, and wrapping each line in the appropriate block-level tag. A second pass then scans the joined output for inline patterns — bold, italic, inline code, and links — so that formatting inside a paragraph or list item is still picked up even after the line-by-line pass has already wrapped it in a block tag.
GitHub, GitLab, and most package registries render a repository's README.md file as formatted HTML automatically. Previewing your README here before committing it lets you confirm that section headings, code blocks, and bullet lists look the way you intend, without needing to push a commit and wait for GitHub to render it just to check formatting.
Many documentation platforms, static site generators, and note-taking apps — including Jekyll, Hugo, Obsidian, and Notion's Markdown import — use the same core syntax. Drafting content here first means you can verify structure and emphasis before pasting it into whichever platform you actually publish to.
# in a heading, which some parsers ignore but others render as literal text** or * that leaves the rest of a paragraph unexpectedly bold or italic* marker and so renders as plain text instead of a bulletA rich text editor applies formatting through toolbar buttons and stores it as hidden markup, which makes the underlying file harder to read, diff, or version in a tool like Git. Markdown keeps formatting visible as plain-text symbols, so a file stays readable even before rendering, and changes between two versions of a document are easy to compare line by line.
Developers use it to check README files and code comments before pushing to a repository. Technical writers use it to draft documentation that will later be rendered by a static site generator. Bloggers and forum users format posts in Markdown for platforms like Reddit, Dev.to, or Hashnode and want to confirm the output before posting, since many of these platforms don't offer a live preview of their own.
This previewer covers the core Markdown syntax — headings, emphasis, links, blockquotes, horizontal rules, inline code, and simple single-level lists. It does not parse tables, nested or numbered lists, fenced code blocks with language-specific syntax highlighting, or images. If your target platform supports these extended features, test the final formatting on that platform directly after drafting the basic structure here.
Some Markdown tools make you click a separate "Preview" tab to see how your formatting looks, which breaks the writing flow since you lose sight of your source text. Because this tool shows the editor and the rendered output side by side at the same time, you can keep both the raw Markdown and its formatted appearance in view while you write, which makes it faster to spot a formatting error right where it happened instead of hunting for it after switching views.
People land on this page looking for a "markdown to html converter online," "markdown live preview tool," "md file previewer," "markdown renderer without download," or a way to "test markdown formatting before posting." All of these describe the same core function this tool provides: typing Markdown and immediately seeing the rendered result.