Does this support GitHub-Flavored Markdown, like tables and strikethrough?

Yes. Tables, strikethrough (~~text~~), task lists, and autolinked URLs are all recognized, the same GFM extensions GitHub itself renders, since the underlying parser has GFM mode enabled.

Is my Markdown uploaded anywhere?

No. Parsing happens entirely in your browser using the open-source `marked` library. Nothing you paste is sent to a server.

Does the output HTML get sanitized?

No, this tool returns exactly what the parser produces, including any raw HTML tags you wrote directly in your Markdown source, since CommonMark permits inline HTML by design. If you're going to render the output with dangerouslySetInnerHTML or similar, sanitize it first, or use the Markdown Preview tool, which sanitizes automatically.

Markdown to HTML Converter - Convert Markdown Online

Overview

Introduction

Markdown is what people write, HTML is what browsers render, and most static site generators, CMSs, and README pipelines need exactly that conversion. This tool does it directly in your browser.

It exists for the same reason a static site generator's Markdown pipeline does, so you don't have to remember which tags a given Markdown construct maps to when you just need the HTML for a one-off page or email.

What Is Markdown to HTML Converter?

A Markdown-to-HTML converter parses Markdown's block and inline syntax (headings, lists, emphasis, links, code fences) and emits the equivalent semantic HTML tags.

This tool targets CommonMark plus the GitHub-Flavored Markdown extensions (tables, strikethrough, task lists) most Markdown you'll encounter today actually uses.

How Markdown to HTML Converter Works

Your input is parsed with `marked`, the same library many static site generators and documentation tools use under the hood, and rendered synchronously to an HTML string.

Everything runs client-side, so there's no upload step and no size limit beyond what your browser can hold in memory.

When To Use Markdown to HTML Converter

Use it when you have a README, changelog, or blog post written in Markdown and need the raw HTML for a CMS, email template, or static page.

It's also useful for checking exactly how a piece of Markdown will render before committing it somewhere the rendering can't easily be previewed.

Often used alongside HTML to Markdown Converter, Markdown Preview and Markdown Formatter & Pretty Printer.

Features

Advantages

Supports GitHub-Flavored Markdown extensions, not just base CommonMark.
Runs entirely client-side, so drafts with sensitive content never leave your browser.
Produces the same output a static site generator's Markdown pipeline would.

Limitations

Output is unsanitized raw HTML; inline HTML written in your Markdown source passes through unchanged.
Front matter (YAML metadata blocks some static site generators prepend) isn't stripped or parsed specially, it renders as literal text.

Examples

Headings, emphasis, and a list

Input

# Title

Some **bold** text.

- one
- two

Output

<h1>Title</h1>
<p>Some <strong>bold</strong> text.</p>
<ul>
<li>one</li>
<li>two</li>
</ul>

Block-level constructs become their matching HTML tags, and inline emphasis becomes <strong>/<em>.

Best Practices & Notes

Best Practices

Sanitize the output before rendering it with dangerouslySetInnerHTML if the Markdown source isn't fully trusted.
Strip any front matter block before converting, since it isn't recognized as metadata.
Use the Markdown Preview tool instead if you want to see the rendered result visually rather than reading HTML source.

Developer Notes

Conversion calls `marked.parse(input, { gfm: true, async: false })`. Forcing `async: false` is what guarantees a `string` return rather than a `Promise<string>`, since `marked.parse()`'s return type only becomes a promise when an async extension is registered; none are here, but the type signature still requires the explicit flag to narrow correctly.

Markdown to HTML Converter Use Cases

Converting a README.md into HTML for a documentation site
Turning a Markdown changelog entry into an HTML email
Spot-checking how a piece of Markdown renders before publishing

Common Mistakes

Rendering the output HTML directly without sanitizing it, when the source Markdown includes untrusted inline HTML or script-like content.
Expecting YAML front matter to be parsed as metadata; it renders as plain text instead.

Tips

Paste GFM tables or task lists to confirm they render correctly before relying on that syntax elsewhere.
Use Markdown Preview instead of this tool if you want a visual result rather than HTML source to copy.

Markdown to HTML Converter