--- title: "Markdown to HTML Converter Online: Free, No Upload" description: "Free Markdown to HTML converter: paste Markdown or open a .md file up to 5 MB. CommonMark and GitHub Flavored Markdown, sandboxed preview. Nothing uploaded." canonical: "https://browser-use.com/tools/markdown-to-html" last_updated: "2026-11-10" --- # Markdown to HTML Converter Online: Free, No Upload ## Markdown to HTML Converter Convert Markdown to HTML in your browser. Tables, task lists and footnotes included. Preview it, then copy or download the HTML. ## How it works ### Paste Markdown Paste Markdown, open a .md file up to 5 MB, or drop one on the box. It is read in this tab and never uploaded. ### Pick the options Keep raw HTML or turn it into text. Add heading ids, or wrap the result in a full HTML document. ### Copy or download Check the preview, then copy the HTML or download it as an .html file. ### Which Markdown does it follow? CommonMark 0.31.2 plus GitHub Flavored Markdown: tables, task lists, strikethrough, bare URLs as links, and footnotes. 638 of the 652 CommonMark spec examples come out exactly as the spec shows. The other 14 differ on purpose: GFM rules, and links outside the allowed schemes emptied. Source: [CommonMark 0.31.2](https://spec.commonmark.org/0.31.2/) · [GFM 0.29](https://github.github.com/gfm/) · [GitHub footnotes](https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#footnotes) ### What happens to raw HTML? Keep copies it as written, as CommonMark does, except that script, style, iframe, textarea, title, xmp, noembed, noframes and plaintext tags become text. Escape as text turns all raw HTML into text. Markdown links keep http, https, mailto, irc, ircs, xmpp and relative URLs; images keep http, https and relative ones. Any other scheme, tel: and ftp: included, gets an empty URL. Raw HTML you keep is not changed. Source: [CommonMark raw HTML](https://spec.commonmark.org/0.31.2/#raw-html) · [GFM tag filter](https://github.github.com/gfm/#disallowed-raw-html-extension-) ### Is the preview safe? The preview is an iframe with an empty sandbox: no scripts, forms, popups, redirects or access to this page, and only images with full URLs load. Links cannot open tabs or leave the frame. The HTML you copy has no sandbox: event handlers in raw HTML you keep will run wherever you paste it. Source: [HTML iframe sandbox](https://html.spec.whatwg.org/multipage/iframe-embed-object.html#attr-iframe-sandbox) ### What about front matter? A YAML block at the very top is removed: a --- line, then key: value lines with no blank line between them, then --- or .... Markdown would otherwise turn it into a horizontal rule and a heading. Any other --- stays a rule. Source: [CommonMark setext headings](https://spec.commonmark.org/0.31.2/#setext-headings) ## Need content from a website, not a file? Browser Use agents open pages in a real browser, including dynamic ones, and return structured data. [See AI web scraping](https://browser-use.com/web-scraping) Converted: 2 headings Markdown\--- title: Trip notes --- # Lisbon trip Leaving \*\*Friday\*\* at 9:00. See the \[schedule\](https://example.com/schedule), ~~not the old plan~~. ## Packing - \[x\] Passport - \[ \] Charger - USB-C cable | Day | City | Budget | | --- | --- | ---: | | Fri | Lisbon | €420 | | Sat | Sintra | €80 | \`\`\`js const total = 420 + 80; \`\`\` Trams run late on weekends.\[^1\] \[^1\]: Check the timetable before you go. Load exampleOpen .md file Your Markdown never leaves this tab. In the preview, images with full URLs load from their own servers; relative paths stay blank. 407 B · front matter removed Raw HTML KeepEscape as text Keep follows [CommonMark](https://spec.commonmark.org/0.31.2/). Script, style, iframe and textarea tags still become text ([GFM tag filter](https://github.github.com/gfm/#disallowed-raw-html-extension-)). Heading ids GitHub-style: "## Get started" gets id="get-started". Full HTML document Adds doctype, charset, viewport, a title from the first h1 and basic CSS. Markdown links keep http, https, mailto, irc, ircs, xmpp and relative URLs; images keep http, https and relative ones. Other schemes, tel: and ftp: included, get an empty URL. Raw HTML you keep is not changed. ## HTML · 1.2 KB Copy HTMLDownload Preview Source

Lisbon trip

Leaving Friday at 9:00. See the schedule, not the old plan.

Packing

Day City Budget
Fri Lisbon €420
Sat Sintra €80 
const total = 420 + 80;

Trams run late on weekends.1

Footnotes

  1. Check the timetable before you go. ↩

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