BrowserTools

Markdown to HTML Converter

Render Markdown with live preview and source

By Guga — BrowserTools maintainer, Tbilisi, Georgia Updated 2026-09-12
Free Private No uploads
What is Markdown to HTML Converter?

Type Markdown on the left and watch the page build on the right, with a tab that switches the right-hand side from the rendered page to the HTML source. The parser understands the GitHub dialect: headings, lists, tables, task lists, strikethrough, fenced code blocks with language tags, block quotes and autolinks. One option is worth knowing about because it differs from strict CommonMark — single line breaks are treated as line breaks, so a newline inside a paragraph becomes a br tag. Everything you see rendered is also what you copy, because the HTML is passed through a sanitiser first: script, iframe, style, form and a dozen other tags are removed, inline event handlers are stripped, and link targets are limited to a safe list of protocols. The sanitiser fails closed, returning nothing rather than unfiltered markup if it cannot parse its input.

Convert Markdown to clean HTML with a live side-by-side preview. Supports headings, lists, links, code blocks, tables and more — copy the HTML or use the rendered result directly.

Private Markdown to HTML Converter In Your Browser

Markdown to HTML Converter is processed locally with client-side JavaScript. Your files never touch a server, and there is no queue to wait in.

Step-by-Step

How to use Markdown to HTML Converter

1

Edit in the Markdown box, which starts with a sample document you can clear.

2

Read the rendered result in the Preview tab.

3

Switch to the HTML source tab when you need the tags rather than the page.

4

Copy the HTML with the button underneath; the sanitised output is what you get.

Key Capabilities
  • GitHub-Flavoured Markdown including tables, task lists, strikethrough and fenced code
  • Live preview beside the source, with a tab for the raw HTML
  • Sanitiser removing script, iframe, style, form and sixteen other dangerous tags
  • Link protocols restricted to a safe list, with target blank links given noopener noreferrer
Common Use Cases
  • A developer writing documentation and needing the HTML fragment for a site or an email template.
  • A writer checking how a README will render before publishing it to a repository.
  • A student inspecting which tags a piece of Markdown actually produces.
Clear Answers

Frequently Asked Questions

Why did my single line break become a line break in the output?
Because a conversion option is set to treat newlines inside a paragraph as breaks. That matches how people write in chat and issues, where a single newline is usually intended, but it is not the strict CommonMark rule — under that rule a lone newline is just whitespace and the two lines would run together. The extra br tags are therefore expected, not a fault.
What happened to the script tag I put in my Markdown?
It was removed before you ever saw it. The output is filtered by a sanitiser that deletes script, iframe, object, embed, form, style, svg, base, meta and a dozen other tags, strips any on-event attribute, and refuses link targets outside a safe protocol list. The HTML you copy is the filtered version, so raw HTML in your source is not passed straight through.
Why did my link lose its href?
Because the target used a scheme the sanitiser does not allow. http, https, mailto, tel, fragment links and relative paths all pass; anything unusual is stripped from the attribute rather than left in place. Images are the one exception, where an inline data URL is accepted for common raster formats.
Does the converter go back to Markdown from HTML?
No, the direction here is one-way. If you have an HTML fragment that came from somewhere else, it is already the output format you want, and this tool will not reverse it into a more editable source.