HTML Viewer
Paste HTML and see it rendered live, in a sandboxed preview that never executes scripts.
Rendered live in a sandboxed frame that never executes scripts, so pasting HTML from an untrusted source is safe. Nothing you type is sent anywhere.
Need the opposite? Use HTML Tester
What is HTML Viewer?
Paste any HTML snippet and see it rendered live in the preview pane as you type. Useful for quickly checking how a snippet of markup looks, testing an email template's HTML, or previewing a chunk of markup pulled from somewhere else before dropping it into a real project. The preview runs inside a fully sandboxed iframe with scripts disabled, so it's safe to paste HTML from a source you don't fully trust — nothing in it can execute code or access the rest of the page.
FAQ
No. The preview frame is sandboxed with scripts disabled, so any <script> tags in your pasted HTML are inert. This is deliberate: it makes the tool safe to use with HTML from an untrusted source.
Yes, an <img> or linked stylesheet referencing a real URL will load normally; only script execution is blocked.