If you write Markdown — README files, docs, blog posts, static site content — at some point you need the HTML. Whether it's to paste into a CMS, check rendering before publishing, or extract a snippet for an email template, a Markdown to HTML converter is a regular tool in most developers' workflow.
Here's how the main free options compare.
What Actually Matters in a Markdown Converter
Before listing tools, the criteria that separate useful from frustrating:
- Live preview — does output update as you type, or do you click Convert each time?
-
Output type — clean raw HTML tags only, or a full page with
<html><head>boilerplate you have to strip? - Syntax support — tables, fenced code blocks, and task lists are GFM extensions, not basic Markdown; check if the tool supports them
-
Copy / download — one-click clipboard copy or
.htmldownload saves friction - Privacy — is your text processed locally in the browser, or sent to a server?
Dillinger.io
One of the oldest and most-linked Markdown editors. Split-pane live preview, cloud storage integration (Dropbox, GitHub, OneDrive), and export to HTML, PDF, and styled HTML.
Good: Export options, GitHub integration if you need it
Bad: Sends your document to their server. The HTML export is a full styled page — not clean raw markup. If you want just the <p> and <h2> tags to paste into a CMS, you get a full page wrapper with Dillinger's styles instead.
MarkdownToHTML.com
A straightforward single-page converter. Paste Markdown, click Convert, get HTML.
Good: Simple
Bad: No live preview — you click a button after every change. No clipboard copy button — you manually select the output. GFM support is limited; tables render inconsistently.
marked.js Demo (marked.js.org/demo)
The reference demo for the marked.js library. Useful specifically for checking how marked will parse edge cases.
Good: Accurate to how the library behaves — useful when debugging a marked.js integration
Bad: Developer reference tool, not a general-purpose converter. No export, no clipboard copy, no file download.
Markdown to HTML on Ultimate Tools
Full live preview — output updates as you type. Raw HTML output only (no page wrapper). CommonMark-compatible: fenced code blocks, tables, task lists, and inline HTML all render correctly. Copy to clipboard in one click.
Runs entirely in the browser — no server round-trip, nothing sent anywhere.
Markdown to HTML converter with live preview — free, browser-only, clean raw output
Comparison at a Glance
| Feature | Dillinger | MarkdownToHTML.com | Ultimate Tools |
|---|---|---|---|
| Live preview | ✅ | ❌ | ✅ |
| Raw HTML output (no wrapper) | ❌ | ✅ | ✅ |
| Copy to clipboard | ✅ | ❌ | ✅ |
| Browser-only (no server) | ❌ | ✅ | ✅ |
| Tables + code blocks (GFM) | ✅ | Partial | ✅ |
| File download | ✅ | ❌ | ✅ |
Which One to Use
Quick conversion for CMS pasting: Browser-only tools. Nothing leaves your machine and you get clean raw HTML to paste directly.
Editing with cloud save + PDF export: Dillinger — but expect your content to hit their servers and expect styled HTML export.
Debugging a marked.js integration: The marked.js demo is the reference implementation.
In a build pipeline: Skip browser tools entirely — use marked or remark as npm packages.
For browser-based Markdown to HTML with live preview and no server upload:
free Markdown to HTML converter — live preview, raw output, copy to clipboard, nothing uploaded
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