Markdown to HTML Converter
Convert Markdown (CommonMark / GitHub-Flavored) to clean HTML — headings, lists, tables, code blocks, links and more. Preview it live and copy the source.
Input
Output
Result will appear here.
Guides
Paste Markdown and get clean, ready-to-use HTML. Headings, bold and italic, lists, links, images, blockquotes, code blocks, and GitHub-Flavored extras like tables and strikethrough are all converted, with a live preview so you can see the result as you type. It runs entirely in your browser.
How do I use it?
Type or paste your Markdown on the left. The HTML source appears on the right, ready to copy or download, alongside a rendered preview. Toggle the options to match the flavour of Markdown you are converting.
What is GitHub-Flavored Markdown?
GitHub-Flavored Markdown (GFM) is the popular superset of standard Markdown used on GitHub, in many wikis, and across countless developer tools. On top of the basics it adds tables, strikethrough (~~text~~), task lists, and automatic linking of bare URLs. Leave the GFM option on for the most familiar behaviour; turn it off for strict CommonMark.
What does the "single line breaks to
" option do?
In standard Markdown, a single newline inside a paragraph is treated as a space — you need a blank line to start a new paragraph. GitHub comments and chat apps instead turn every line break into an actual <br>. Enable this option if your source was written for that "every Enter is a new line" style.
Is the HTML safe to publish?
The converter follows standard Markdown rules, which means raw HTML you embed in the Markdown is passed straight through — including any <script> tags. The copyable source is exactly what you wrote. The live preview, however, is sanitized: scripts, styles, and event handlers are stripped before rendering, so previewing untrusted Markdown can't run code. If you plan to publish HTML built from content you did not write yourself, run it through a sanitizer first.
Need the reverse?
To go the other way — HTML back into Markdown — use the HTML to Markdown Converter.
Is my content private?
Yes. The conversion happens entirely in your browser; your Markdown is never uploaded or stored.
Use it from code
From 3 credits per callREST API
curl -X POST https://api.iotools.cloud/v1/tool/markdown-to-html \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"markdown": "# Hello World\n\nThis is **bold** and this is *ita…",
"gfm": "true",
"breaks": ""
}'Swap in your own key from your account. The tool's fields are the body — no wrapper.
Ask an AI agent
Use the IOTools `markdown-to-html` tool (Markdown to HTML Converter) on this input:
YOUR_INPUT_HEREPaste this at any agent connected to the IOTools MCP server, then add your input.
Part of a chain
All chainsConvert Markdown to HTML, then strip whitespace and comments from the result — ready to paste into an email template or inline snippet without the extra bytes, entirely in your browser.
Collapse stray double-spaces, trim/dedupe/sort a raw list, turn it into a Markdown bullet list, render that to HTML, then minify — five tools chained into one pass, entirely in your browser.