Markdown to HTML Converter Online Free — Convert MD Instantly

Markdown is a lightweight markup language designed for writing formatted text with plain-text syntax. It was created by John Gruber in 2004 and is now used by GitHub, Stack Overflow, Reddit, Notion, and almost every developer documentation platform.

Markdown syntax quick reference

GitHub Flavored Markdown (GFM)

GFM extends standard Markdown with additional features:

• Tables — created with | separators
• Task lists — - [x] done and - [ ] todo
• Fenced code blocks — triple backtick with optional language name
• Strikethrough — ~~text~~
• Autolinks — bare URLs are automatically linked

Privatool's converter supports GFM by default.

When to convert Markdown to HTML

• Embedding Markdown content in a CMS that only accepts HTML
• Sending rich email content (HTML email from Markdown source)
• Generating static HTML pages from Markdown documentation
• Previewing Markdown output before publishing to a platform
• Extracting HTML from README files for embedding in websites

How to convert Markdown to HTML

1. Go to Markdown to HTML
2. Type or paste your Markdown in the left panel
3. See the live HTML preview on the right
4. Click Copy HTML to get the raw HTML source, or Download to save as .html

Tips for clean HTML output

• Use heading levels sequentially (h1 → h2 → h3) for better semantic HTML
• Specify language in fenced code blocks (```js) for syntax highlighting classes
• Use reference-style links for long URLs to keep Markdown readable

Why two Markdown files render differently

Markdown has no single specification, and the differences bite in predictable places. The main dialects:

• CommonMark — the strict, unambiguous baseline most parsers now build on.
• GitHub Flavored Markdown (GFM) — CommonMark plus tables, strikethrough, task lists, and autolinks.
• MultiMarkdown / Pandoc — adds footnotes, citations, and definition lists.

A table renders in GFM and appears as literal pipes in strict CommonMark. A footnote works in Pandoc and prints as [^1] elsewhere. If your Markdown looks correct in one editor and broken after conversion, a dialect mismatch is almost always the reason.

Line breaks: the most common surprise

A single newline in Markdown does not produce a line break. This:

Line one
Line two

becomes one paragraph: <p>Line one Line two</p>. Markdown joins consecutive lines by design, so you can hard-wrap source text without affecting output.

To force a break, use two trailing spaces, a backslash, or an explicit <br>:

Line one··
Line two

To start a new paragraph, leave a blank line. This catches people writing addresses, poetry, or song lyrics, where every line matters.

Indentation and nested lists

Markdown uses indentation to express nesting, and mixing tabs with spaces produces inconsistent results across parsers. Use spaces, and align continuation content with the text of the parent item:

1. First step
   Continuation of the first step.

   ```bash
   a-command --here

2. Second step

Under-indenting the code block ends the list; over-indenting by four or more turns it into a code block of its own. Three spaces for an ordered list, two for a bullet list, is the reliable convention.

## HTML inside Markdown

Most parsers allow raw HTML, which is how you get features Markdown lacks — a `<details>` block, a `<figure>` with a caption, an iframe. Two caveats.

Markdown syntax is generally **not** processed inside a block-level HTML element, so `**bold**` inside a `<div>` may render literally. Some parsers re-enable this with a blank line inside the tag.

More importantly, raw HTML in Markdown from an untrusted source is an XSS vector. If you render user-supplied Markdown, either disable raw HTML in the parser or sanitise the output with something like DOMPurify. Never trust "it's only Markdown".

## Semantic output

Converted HTML is only as good as its structure. Heading levels become `<h1>`–`<h6>` directly, so skipping from `##` to `####` produces a document that fails accessibility checks and reads incorrectly in screen readers.

Similarly, image alt text is the bracketed part — `![alt text](image.png)`. Leaving it empty produces `alt=""`, which is correct for decorative images and an accessibility failure for meaningful ones.

## Frequently asked questions

### Is Markdown to HTML lossless?

In one direction, effectively yes: Markdown is a subset of what HTML expresses. Converting back from HTML to Markdown is lossy, because HTML supports structures and attributes Markdown cannot represent.

### Why do my tables not render?

Tables are a GFM extension, not core Markdown. Ensure the converter supports GFM, and that the header separator row (`|---|---|`) is present — it is required, not decorative.

### Can I convert Markdown with front matter?

The YAML block between `---` fences is metadata, not Markdown. Most converters either strip it or render it as text. Remove it before converting if you only want the body.

### How do I escape a character Markdown treats as syntax?

Prefix it with a backslash: `\*not italic\*`. Useful for asterisks, underscores in filenames, and hashes at the start of a line.

### Does the converted HTML include CSS?

No. Conversion produces structural HTML only — headings, paragraphs, lists, code blocks. Styling is yours to supply, which is why the same Markdown looks different on every site.

[Convert Markdown to HTML free →](/tools/markdown-to-html)