HTML Viewer
An HTML viewer lets you paste HTML and see it rendered instantly, right in your browser. Type or paste your markup below and the rendered result appears in the preview panel as you go. It runs in a safe sandbox with scripts disabled, and nothing you paste is uploaded.
What an HTML viewer does
An HTML viewer takes raw HTML and shows you what it looks like when a browser renders it. You paste your markup on the left and the rendered result appears in the preview panel, updating as you type. It saves you creating and saving a file just to check how a snippet displays.
This is handy when you have a chunk of HTML from an email template, a CMS field, a scraped page, or a code sample and you want to see it laid out without setting up a project. It is also a quick way to sanity-check that your tags are balanced and your inline styles are doing what you expect.
How it works, and why it is safe
The preview renders entirely in your own browser. Nothing you paste is uploaded or stored on a server. The rendering happens inside a sandboxed frame, which means your HTML and inline CSS display normally, but any scripts are blocked from running. That keeps the tool safe to use with markup from sources you do not fully trust, since a pasted snippet cannot execute code, pop up dialogs, or reach your other tabs.
Because scripts are disabled, anything that depends on JavaScript (interactive widgets, dynamic content) will not run in the preview. What you see is the static structure and styling. For most checking and previewing that is exactly what you want. Your most recent input is saved in your own browser so it is still there if you refresh.
Common uses
People reach for an HTML viewer to preview marketing email HTML before sending, to check a code snippet from documentation or a tutorial, to inspect the markup pasted out of a rich-text editor, to teach or learn how tags and inline styles behave, and to quickly confirm that copied HTML is well formed. Because it is instant and needs no setup, it fits neatly into the middle of another task.
If you only need the plain text out of some HTML rather than a rendered preview, the Text Formatter can strip the tags for you. If you need to escape or encode text instead, the String to JSON and Hex tools cover those jobs.
Frequently asked questions
Does the HTML viewer run JavaScript?
No. The preview is sandboxed, so HTML and inline CSS render but scripts are blocked from running. This keeps it safe to paste markup from any source. What you see is the static rendered structure.
Is my HTML uploaded anywhere?
No. Rendering happens entirely in your browser. Nothing you paste is sent to a server or stored by us. Your latest input is kept only in your own browser so it survives a refresh.
Why do images or styles not load sometimes?
Images and stylesheets that point to relative paths or external files may not resolve in a standalone preview. Absolute image URLs and inline styles work fine. External scripts never run because of the sandbox.
Can I see the source and the preview together?
Yes. The HTML you type stays in the input box on top, and the rendered result shows in the preview below, side by side as you work. Use Copy HTML to grab the source.
Is it really free?
Yes. Every Shiftext tool is free, needs no sign-up, and runs client-side in your browser.
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