HTMLViewer

What it does

HTMLViewer is a free, browser-only tool that renders your HTML instantly as you type, paste, drop, or open it. The preview updates automatically, with no uploads, publishing steps, or account required. Everything runs locally, so your code is never transmitted or stored—ideal for client work, email templates, or unreleased pages. You can format messy markup, load a sample, and export your result. When you're ready to go live, Tiiny Host publishes it to a shareable URL in seconds.

Free online HTML viewer. Paste, drag & drop or open an HTML file and view it instantly.

Type or paste HTML. The preview updates automatically; nothing is uploaded. Paste the markup in, or drag the file onto the page. The file is read by your own browser and rendered locally — no copy is sent anywhere, which is why this works on confidential documents. Yes. No account, no sign-up, no watermark and no limit on how many documents you open. No. The site is a static page; once it has loaded, nothing you type or open produces a network request carrying your document. You can confirm it in the network tab of your browser's developer tools. They are almost certainly referenced by relative path. Your files are never uploaded, so there is no folder alongside the document for styles.css…from htmlviewer.com

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