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? 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.
How to Use the HTML Viewer
- 1
Paste the HTML: Enter any HTML snippet, such as an email template or a markup fragment.
- 2
Review the Live Preview: The rendered result appears automatically in the sandboxed preview pane.
What This Tool Is For
It renders raw HTML markup live, without a code editor, a build step, or a full project set up. You paste markup, and the preview pane updates immediately. That's useful anywhere you have HTML but not a convenient place to actually see it rendered. A common case: checking an HTML email template before sending it. Email HTML is notoriously finicky (inline styles, table-based layouts, no modern CSS), and pasting a template here gives a fast visual check without opening an email client's send-a-test-message flow every time you tweak something.
Frequently Asked Questions
Common questions about HTML Viewer.