🔧Toolify

Markdown to HTML Converter (CommonMark subset)

Paste Markdown and instantly see the equivalent HTML. Works for blog posts, documentation, README files. Output is clean, semantic HTML you can paste into any CMS or static site.

HTML output
<h1>Hello</h1>
<p>A <strong>bold</strong> statement and <em>italic</em> text.</p>
<ul>
<li>Item 1</li>
<li>Item 2</li>
</ul>
<p><a href="https://tools.appdevelopsk.com">Toolify</a></p>
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Hello

A bold statement and italic text.

  • Item 1
  • Item 2

Toolify

Related tools

How it works

What's supported

Headings: # H1 through ###### H6. Lists: - / * / + for unordered, 1. 2. 3. for ordered. Blockquotes: > start of line. Code blocks: ``` with optional language. Inline: **bold**, *italic*, `code`, ~~strike~~, [link](url), ![alt](image-url). Horizontal rule: ---, ***, or ___.

We implement the CommonMark essentials. Tables, footnotes, and task lists (-[ ]) are not yet included; for those, use a full CommonMark or GFM library on your build pipeline.

When to use this tool

Quick conversion for pasting into a CMS. Most CMSes accept HTML; if you write in Markdown but the editor doesn't render it natively, run through this tool first.

Documentation generation: convert README.md to HTML for a project landing page. The output is clean enough to wrap in a basic template.

Email composition: many email clients render HTML but not Markdown. Write in Markdown, convert, paste.

Browser-side conversion

All conversion runs in your browser. Your Markdown — which may contain confidential drafts, code snippets, or notes — never leaves your machine. No server logs, no AI training data, just deterministic regex transformation.

If you need GFM features (tables, task lists, footnotes), use a fuller library like marked.js, markdown-it, or remark in your build. For most simple-to-moderate Markdown, this tool's output is sufficient.

Frequently asked questions

›Does this support tables?

Not yet. Tables are a GFM extension, not pure CommonMark. We may add them in a future version.

›Will my code blocks be syntax-highlighted?

We add a class='language-X' to <pre><code> tags so highlighters like Prism or highlight.js can style them. The HTML itself is unstyled — apply your own CSS or library.

›Is the output safe to paste anywhere?

We escape <, >, &, and " in code blocks and inline code. Other content is converted as-is. If you're pasting user-generated Markdown, sanitize the output before injecting into a page.

›Why is my emphasis weird?

Markdown emphasis nesting can be tricky. * vs _ may behave differently with adjacent punctuation. CommonMark spec is precise; if our output diverges, paste the spec example for a check.

›Does this handle HTML inside Markdown?

Inline HTML is passed through (which is CommonMark behavior). Use carefully — malicious HTML from untrusted sources will pass through unchanged.

›Can I convert HTML back to Markdown?

Yes — see our HTML to Markdown converter (linked under Related Tools).

›What about footnotes?

Not implemented (GFM extension). For complex documents, use a server-side library like remark-gfm.

›Does the data leave my browser?

No. Conversion runs locally; your Markdown is never sent anywhere.

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