See your Markdown rendered instantly — private, free, no install.

Writing Markdown without a preview means constantly switching back and forth between your text editor and a renderer — GitHub, a local dev server, or a documentation platform. For quick checks on a blog post draft, a README update, or a documentation snippet, that round-trip is slow. You want to paste the text and immediately see whether the headings are right, the code block is fenced correctly, and the table aligns.

Handytool's Markdown viewer does exactly that. Paste any Markdown into the left pane and the right pane shows a fully rendered HTML preview — styled headings, formatted code, working links — not raw HTML tags. Because rendering runs locally in your browser, you can preview confidential drafts, internal documentation, or unreleased content without any of it leaving your machine.

The viewer renders Markdown using a JavaScript library loaded in your browser tab. When you paste content and click Preview, nothing is sent over the network. Paste a private product spec, an embargoed announcement, or internal release notes and none of it leaves your machine.

The tool also works offline. Once the page has loaded you can disconnect from the internet and keep previewing. This makes it useful for writing sessions on planes, in areas with unreliable connectivity, or in environments with strict network policies.