Ttooleras
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Markdown to HTML

Converters

Convert Markdown to clean HTML — GFM, tables, code highlighting. Free, private — all processing in your browser.

112 words·41 lines·~1 min read
Markdown

Markdown Preview

This is a live preview of your Markdown content.

Features

  • Real-time rendering
  • GitHub Flavored Markdown
  • Tables, task lists, strikethrough

Code Block

function greet(name) {
  return `Hello, ${name}!`;
}

Table

FeatureStatus
Bold✅
Italic✅
Links✅
Images✅
Tables✅
Code✅

Task List

  • Write Markdown
  • Preview in real-time
  • Copy HTML output

This is a blockquote with bold and italic text.

Learn more in our Markdown Syntax Guide.

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Write Markdown on the left and watch it render live on the right, with full GitHub Flavored Markdown — tables, task lists, strikethrough, and fenced code blocks all work, not just the basics. Switch the right pane to the HTML tab when you want to grab the markup instead of the preview.

It's a fast way to draft a README, a comment, or a doc and see exactly how it'll look before you commit it — and everything renders in your browser, so unpublished writing stays private.

Using the Markdown to HTML

  1. 1

    Paste your Markdown

    Copy from a README, blog post, notes app, GitHub issue, or anywhere else Markdown is used.

  2. 2

    View the HTML output

    Right side shows rendered HTML, left side shows Markdown source. Updates live as you edit.

  3. 3

    Choose GFM or CommonMark

    GFM (default) supports tables, task lists, and strikethrough. CommonMark is stricter for academic/interoperable use.

  4. 4

    Copy the HTML

    Click Copy to grab the HTML source. Paste into your CMS, email template, or HTML file.

  5. 5

    Download as file

    Download a complete HTML file (with wrapping `<html>`, `<head>`, `<body>`) for standalone use.

Markdown to HTML — examples

Basic heading and paragraph

Simplest Markdown to HTML.

Input
# Hello World

This is a **paragraph** with *italic* text.
Output
<h1>Hello World</h1>
<p>This is a <strong>paragraph</strong> with <em>italic</em> text.</p>

Table

GFM tables convert to HTML tables.

Input
| Name | Age |
|------|-----|
| Ada  | 36  |
| Alan | 42  |
Output
<table>
<thead>
  <tr><th>Name</th><th>Age</th></tr>
</thead>
<tbody>
  <tr><td>Ada</td><td>36</td></tr>
  <tr><td>Alan</td><td>42</td></tr>
</tbody>
</table>

Code block with syntax highlighting

Language tag triggers highlight.js.

Input
```js
function hello() {
  console.log("Hello");
}
```
Output
<pre><code class="language-js">
<span class="hljs-keyword">function</span> <span class="hljs-title">hello</span>() {
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">"Hello"</span>);
}
</code></pre>

Task list

GFM checkbox lists.

Input
- [x] Buy groceries
- [ ] Cook dinner
- [ ] Clean up
Output
<ul>
  <li><input type="checkbox" checked disabled> Buy groceries</li>
  <li><input type="checkbox" disabled> Cook dinner</li>
  <li><input type="checkbox" disabled> Clean up</li>
</ul>

Links and images

Inline and reference links, image embedding.

Input
Visit [Tooleras](https://tooleras.com) for free tools.

![Logo](https://tooleras.com/logo.png)
Output
<p>Visit <a href="https://tooleras.com">Tooleras</a> for free tools.</p>
<p><img src="https://tooleras.com/logo.png" alt="Logo"></p>

Blockquote with nesting

Multi-level quotes.

Input
> First level quote
>
> > Nested second level
> >
> > > Triple nested
Output
<blockquote>
<p>First level quote</p>
<blockquote>
<p>Nested second level</p>
<blockquote>
<p>Triple nested</p>
</blockquote>
</blockquote>
</blockquote>

Features at a glance

GitHub Flavored Markdown (GFM)

Tables, task lists, strikethrough, autolinks, fenced code blocks — the flavor used everywhere in 2026.

Syntax highlighting

Code blocks with language tags are syntax-highlighted. Supports 190+ languages via highlight.js.

Live preview

HTML output updates as you type. See exactly what your Markdown will look like.

Safe HTML output

DOMPurify sanitizes the output to prevent XSS. Safe to render user-submitted Markdown.

Copy or download

Copy the rendered HTML to clipboard, or download as an .html file ready to publish.

Custom header IDs

Headings get auto-generated IDs (`<h2 id="my-heading">`) so you can link to them with anchor URLs.

Table of contents

Auto-generate a table of contents from headings. Useful for long documentation pages.

100% client-side

Your Markdown content stays in your browser. Safe for confidential documentation and drafts.

Common use cases for the Markdown to HTML

Blogging and content

  • →Convert Markdown blog posts to HTML: For platforms that don't render Markdown (WordPress classic editor, some email platforms), convert to HTML first.
  • →Export GitHub README as HTML: Render GitHub README.md to HTML for embedding in a marketing website or docs site.
  • →Newsletter content: Write in Markdown, convert to HTML for Mailchimp, ConvertKit, or Substack HTML editor.
  • →Medium and Hashnode: Some platforms prefer HTML import over Markdown. Convert to HTML for better formatting fidelity.

Documentation

  • →Docs site generation: When your docs generator has issues, convert manually to verify HTML output matches expectations.
  • →API documentation: Render Markdown docs to HTML for embedding in Swagger/OpenAPI descriptions.
  • →Internal wikis: Teams using Markdown-based wikis (Outline, Bookstack) can export pages as HTML.

Development

  • →GitHub issue preview: Before posting a complex issue with code blocks and tables, verify formatting by converting to HTML.
  • →Pull request description formatting: Make sure your PR description renders correctly by previewing the HTML.
  • →Commit messages with markdown: GitHub renders commit messages with Markdown. Preview before pushing.

Writing and publishing

  • →Academic papers and reports: Write in Markdown, convert to HTML for online publication, or to PDF via HTML-to-PDF.
  • →Books and long-form: Authors write in Markdown for portability. Convert to HTML for web serialization or ePub generation.
  • →Copy content between apps: Markdown written in Obsidian → HTML → pasted into Google Docs or Word.

How it works

The preview is a real Markdown render, not a guess. It uses a proper parser with the GitHub Flavored Markdown (GFM) extensions, so what you see matches how GitHub, most static-site generators, and modern Markdown renderers will display it.

GFM adds the things plain Markdown lacks:
- Tables — pipe-delimited, with a |---|---| separator row under the header (miss that row and it renders as plain text).
- Task lists — - [ ] and - [x].
- Strikethrough — ~~text~~.
- Fenced code blocks — triple backticks, with a language hint for highlighting.

A note on the two tabs. The Preview tab is the accurate, GFM-faithful render — trust it for how the content will actually look. The HTML tab is a lightweight export for quickly copying markup; it covers the common elements but isn't a full sanitizing production pipeline. For HTML you'll ship to users, run your Markdown through your framework's own renderer (and sanitize it) rather than treating a copy-paste as final.

Structure gotchas: nested lists need consistent indentation, a blank line separates paragraphs, and a hard line break needs two trailing spaces or a backslash.

Troubleshooting

⚠Table renders as plain text

GFM tables require the separator row of dashes and pipes (|---|---|) directly under the header row. Without it, the parser doesn't recognize a table. Add the separator line.

⚠Nested list items flatten out

Nested lists depend on consistent indentation (usually two spaces per level under the parent item). Mixed tabs and spaces or the wrong indent collapses the nesting.

⚠Line breaks disappearing

A single newline inside a paragraph is treated as a space. For a hard line break, end the line with two spaces or a backslash; for a new paragraph, leave a blank line.

⚠Treating the HTML tab as production output

The HTML tab is a quick export of the common elements, not a sanitized, full-fidelity pipeline. For HTML you serve to users, render with your framework's Markdown library and sanitize it.

⚠Expecting platform-specific extras to work

Mentions, custom emoji, admonition blocks, and math are platform features, not standard GFM. They won't render here — verify them in the actual destination.

How it compares

Markdown vs writing HTML by hand. Markdown is faster to write and reads fine as plain text, which is why READMEs, issues, and docs use it. It compiles to a safe subset of HTML. Reach for raw HTML only when you need something Markdown can't express.

GFM vs CommonMark vs original Markdown. Original Markdown was loosely specified; CommonMark pinned down the ambiguous cases; GFM is CommonMark plus tables, task lists, strikethrough, and autolinks. This preview targets GFM, which is what GitHub, GitLab, and most tools use today.

Preview here vs your final renderer. This shows how standard GFM renders. Your actual platform may add or restrict features (custom emoji, mentions, admonitions, its own sanitizer). Draft here, but confirm anything exotic in the destination.

Markdown to HTML — FAQ

▶Does it support tables and task lists?

Yes. The preview uses GitHub Flavored Markdown, so tables, task lists, strikethrough, and fenced code blocks all render. Tables need the |---|---| separator row under the header to be recognized.

▶Is my Markdown uploaded anywhere?

No. Rendering happens entirely in your browser, so drafts, private docs, and unpublished writing never leave your device.

▶What's the difference between the Preview and HTML tabs?

Preview is the accurate, GFM-faithful render — trust it for appearance. HTML is a lightweight export for copying markup; it covers common elements but isn't a sanitized production pipeline. Use your framework's renderer for HTML you ship.

▶Is this GitHub Flavored Markdown or plain Markdown?

GFM — CommonMark plus tables, task lists, strikethrough, and autolinks. That's what GitHub, GitLab, and most modern tools use, so the preview reflects how your content will look on those platforms.

▶Can I use raw HTML inside the Markdown?

Standard Markdown allows inline HTML, but renderers vary in what they permit and sanitize. Keep to Markdown for portability; use raw HTML only when necessary and confirm the destination allows it.

▶Why did my two lines merge into one?

A single newline is treated as a space in Markdown. Add two spaces at the end of the line (or a backslash) for a hard break, or a blank line for a new paragraph.

Further reading

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