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About this tool
Convert Markdown into HTML and strip HTML back to text.
The Markdown / HTML Converter turns Markdown into HTML and takes HTML back to Markdown or plain text, entirely in your browser. The Markdown side covers the CommonMark constructs people actually type — ATX headings, paragraphs, hard line breaks, emphasis, inline and fenced code, links, images, blockquotes, ordered and unordered lists and thematic breaks — plus the GitHub Flavored Markdown extensions for tables and strikethrough. Text is HTML-escaped by default and only http, https, mailto, tel and relative URLs are emitted, so a pasted snippet cannot inject markup or a javascript: link into your page.
Open Markdown / HTML Converter on AltFTool — it loads instantly in your browser.
Paste your text into the Input box and choose a Direction: Markdown → HTML, HTML → Markdown, or HTML → plain text.
Leave "Allow raw HTML in the Markdown" unticked so pasted tags stay escaped as text, or tick it to pass raw HTML straight through — the result re-renders on every keystroke, with no convert button.
Read the Result box, which reports output characters, words and lines plus reading time at 200 wpm, then press Copy result; Reset restores the sample release-note Markdown.
Angle brackets and quotes in your text stay text; raw HTML is opt-in with one checkbox.
javascript: and data: URLs are left as literal text instead of becoming clickable.
Markdown converted to HTML and back returns the same headings, lists, tables and code fences.
Yes. A header row followed by a divider row of dashes becomes a full <table> with <thead> and <tbody>, and the reverse direction rebuilds the pipe-and-dash syntax. Strikethrough with ~~double tildes~~ is supported too.
No. Both directions are plain JavaScript running in the page, with no network request, so drafts and internal documentation stay on your machine.
Because raw HTML is off by default: `<div>` comes out as <div> so pasted content cannot inject markup. Tick "Allow raw HTML in the Markdown" to pass tags straight through, which is what CommonMark does by default.
Reference-style links (`[text][ref]` with a definition elsewhere), nested blockquotes, nested lists beyond one level, footnotes and setext headings written with underlines of === or ---. Everything else in the list above converts both ways.
Add the Markdown / HTML Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
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