Markdown ↔ HTML converter

Markdown to clean HTML with a live preview — and the reverse — converted as you type, on your own device.

A .md or .html file — or just paste below · converted on your device

No size limit · files are processed on your device and never uploaded · how it works

Advanced settings (optional)

Direction

Convert

Markdown source becomes clean HTML with a live preview.

Markdown in

HTML out (rendered below)

Runs in your browser. Files are never uploaded — you can go offline after the page loads.

How to use the Markdown ↔ HTML

Paste text or drop a .md / .html file — the direction is picked automatically.
The conversion runs live as you type, with a rendered preview.
Copy the output or download the file.

Easy to use

Drop files, pick options, download. Whole folders at once, no signup, no daily limit.

Best quality

The same engines the professionals use — SVGO, resvg, MozJPEG, libwebp, libavif — compiled to run in your browser.

Private & secure

Files are processed on your device and never uploaded. Close the tab and nothing remains anywhere.

Both directions, honestly rendered

Markdown→HTML is the everyday direction: a README into a web page, notes into an email-ready fragment, docs into a CMS. The preview shows the actual rendered result, and the downloaded .html is a complete, readable document. HTML→Markdown is the migration direction: CMS exports, copied web content and legacy pages turned into clean CommonMark for a docs repo or notes app.

Everything converts live in your browser as you type. For Word documents, DOCX to Markdown handles the .docx side of the same journey.

Frequently asked questions

Which Markdown flavour?

CommonMark with the common GitHub extensions — headings, fenced code, lists, links, emphasis, tables. What renders on GitHub renders here.

When is the HTML→Markdown direction useful?

Migrating old web content into a docs-as-code repo, converting a CMS export, or turning a copied web page section into notes — paste the HTML, take the Markdown.

DOCX to MarkdownWord documents into clean Markdown Word to HTML & TextA SVG to CSSData URIs for background & mask

Your files never leave your device

Most online converters upload your file to a server. InfyTool ships the actual encoders to your browser as WebAssembly instead, so processing happens inside your tab — faster for batches, and nothing to delete afterwards.

No upload, ever. Turn off Wi-Fi after the page loads and every tool keeps working.
No limits. No file-size cap, no queue, no watermark, no account.
Runs on your CPU. Batches use several cores in parallel; nothing is throttled.

More free tools

Need icons or SVGs to start from?

InfyTool is built by the same team as these free libraries.

InfyIconFree SVG and PNG icons you can open directly in these tools. InfySVGFree SVG designs and illustrations, ready to optimise or convert. InfyPNGFree transparent PNG graphics for mockups and social posts.