Does this Markdown to HTML converter support all Markdown features?

It covers the most common CommonMark features: headings (h1–h6), bold, italic, inline code, fenced code blocks with language hints, unordered and ordered lists, blockquotes, horizontal rules, links, and images.

Is my Markdown sent to a server?

No. The conversion happens entirely in your browser using JavaScript. Your text never leaves your device and nothing is uploaded.

Can I convert large Markdown documents?

Yes. Because the tool runs client-side there is no file-size restriction imposed by a server. Very large documents may take a moment to process depending on your device.

Does the preview render the HTML safely?

The preview renders the generated HTML in an isolated div so you can see how it looks. Treat pasted HTML with the same care you would any user-generated markup before inserting it into a live site.

What is the difference between the Source tab and the Preview tab?

The Source tab shows the raw HTML string that was generated. The Preview tab renders that HTML inside the tool so you can visually inspect headings, links, lists, and other elements.

Can I use this to convert README files?

Absolutely. Paste the contents of any .md file: README, CHANGELOG, documentation: and get the equivalent HTML output instantly.

Does it support GitHub Flavored Markdown (GFM)?

The core formatting elements (bold, italic, headings, lists, code blocks, links) are supported. GFM extensions such as task lists and tables are not currently rendered.

Is this tool free to use?

Yes, completely free with no account, no sign-up, and no usage limits.

CSV → JSON JSON → CSV JSON → XML XML → JSON HTML → Markdown Markdown → HTML INI ↔ JSON String Escape JWT Generator Data Transfer Morse Code Image → Base64 Date & Time

Markdown → HTML

Convert Markdown to HTML. Switch between source view and rendered preview.

Markdown Input

<h1>Hello World</h1>

<p>This is a <strong>bold</strong> and <em>italic</em> paragraph with <code>inline code</code>.</p>

<h2>Features</h2>

<ul>
  <li>Headings (h1–h6)</li>
  <li><strong>Bold</strong> and <em>italic</em> text</li>
  <li><code>Inline code</code> and code blocks</li>
  <li><a href="https://example.com">Links</a></li>
  <li>Unordered and ordered lists</li>
<p></ul></p>
<pre><code class="language-js">const greet = (name) =&gt; <code>Hello, ${name}!</code>;
<p>console.log(greet("World"));</code></pre></p>

<blockquote>This is a blockquote.</blockquote>

<hr>

<ol>
  <li>First item</li>
  <li>Second item</li>
  <li>Third item</li>
<p></ol></p>

Convert Markdown to HTML online: free, instant, and private

Markdown is the go-to lightweight markup language for writing formatted text using a plain-text editor. But most publishing targets: websites, email clients, CMS platforms: require HTML. This tool bridges that gap by converting your Markdown to clean, readable HTML without any server round-trip.

The converter handles all the everyday Markdown constructs: ATX-style headings from h1 to h6, bold and italic text using asterisks or underscores, inline code and fenced code blocks with optional language identifiers, unordered and ordered lists, blockquotes, horizontal rules, and linked text and images. The rendered preview lets you verify the output visually before you copy it.

Step-by-step guide

1
Paste or type your Markdown
Enter any Markdown text in the left-hand input panel: headings, lists, code blocks, links, and more.
2
Preview the HTML output
The right panel shows the generated HTML source code in real time as you type.
3
Switch to rendered preview
Click the Preview tab to see how the HTML will look in a browser, with full formatting applied.
4
Copy the HTML
Click the Copy HTML button to copy the converted output to your clipboard with one click.
5
Paste into your project
Drop the HTML into your website, email template, CMS, or any other destination.

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Frequently Asked Questions

Does this Markdown to HTML converter support all Markdown features?: It covers the most common CommonMark features: headings (h1–h6), bold, italic, inline code, fenced code blocks with language hints, unordered and ordered lists, blockquotes, horizontal rules, links, and images.
Is my Markdown sent to a server?: No. The conversion happens entirely in your browser using JavaScript. Your text never leaves your device and nothing is uploaded.
Can I convert large Markdown documents?: Yes. Because the tool runs client-side there is no file-size restriction imposed by a server. Very large documents may take a moment to process depending on your device.
Does the preview render the HTML safely?: The preview renders the generated HTML in an isolated div so you can see how it looks. Treat pasted HTML with the same care you would any user-generated markup before inserting it into a live site.
What is the difference between the Source tab and the Preview tab?: The Source tab shows the raw HTML string that was generated. The Preview tab renders that HTML inside the tool so you can visually inspect headings, links, lists, and other elements.
Can I use this to convert README files?: Absolutely. Paste the contents of any .md file: README, CHANGELOG, documentation: and get the equivalent HTML output instantly.
Does it support GitHub Flavored Markdown (GFM)?: The core formatting elements (bold, italic, headings, lists, code blocks, links) are supported. GFM extensions such as task lists and tables are not currently rendered.
Is this tool free to use?: Yes, completely free with no account, no sign-up, and no usage limits.

AlteredIdea vs alternatives

vs server-side converters: AlteredIdea converts in your browser: your data never leaves your device.

vs writing scripts: Instant results, no coding needed.

vs paid tools: Completely free, no account required.

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