Markdown to HTML Converter
Paste Markdown and get clean, sanitized HTML with a rendered preview. For writers checking how a README will render, developers embedding user content safely, and anyone converting notes into web-ready markup.
How to use
- Paste your Markdown into the input panel.
- Click Convert to see the generated HTML and a rendered preview.
- Copy the HTML output into your page, CMS or email template.
Markdown, created by John Gruber in 2004, is a plain-text formatting syntax designed to be readable before conversion: asterisks for emphasis, hash marks for headings, hyphens for lists. Its genius is that the source looks like what it means, which is why it conquered READMEs, documentation sites, static blogs, and the message formatting of tools from GitHub to Slack (each with dialect quirks).
Dialects are the first thing to understand. The original spec was loose, so CommonMark emerged as a rigorous standard, and GitHub Flavored Markdown (GFM) extends it with tables, strikethrough, task lists and autolinked URLs. A table that renders on GitHub may not render in a converter that only speaks CommonMark, this tool supports the GFM extensions people actually use.
The second thing is safety. Markdown permits raw inline HTML, which means converting untrusted user input can smuggle script tags and event handlers straight into your page. Velona's converter sanitizes its output with bleach, stripping script tags, javascript: URLs and event-handler attributes, so what you copy is safe to embed. If you convert Markdown in your own app, do the same, sanitize after conversion, not before, because the converter itself can generate HTML from innocent-looking syntax.
Common conversion surprises: a single newline does not create a paragraph break (leave a blank line, or end a line with two spaces for a line break), indented text becomes a code block at 4 spaces, and underscores inside words (snake_case_names) can trigger unintended emphasis in some dialects.
Examples
Input: # Title
Some **bold** text.
Output: <h1>Title</h1>
<p>Some <strong>bold</strong> text.</p>Input: [Velona](https://velona.example)
Output: <p><a href="https://velona.example">Velona</a></p>Input: ```python
print("hi")
```
Output: <pre><code class="language-python">print("hi")
</code></pre>Frequently asked questions
Why doesn't a single line break create a new line in the output?
Standard Markdown treats a lone newline as a soft wrap within the same paragraph. Leave a blank line for a new paragraph, or end the line with two trailing spaces (or a backslash) to force a hard break.
Is the HTML output safe to embed directly?
Yes, output is sanitized with bleach, which removes script tags, inline event handlers and javascript: links. Standard formatting elements (headings, lists, tables, code, links, images) pass through.
Are GitHub-style tables supported?
Yes, pipe tables with a header separator row convert to table markup, along with other GFM extensions like strikethrough and task lists.
Why does my_variable_name render with italics?
Underscores can open emphasis in some Markdown dialects even mid-word. Wrap identifiers in backticks, which is better style for code anyway, or escape the underscores with backslashes.
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