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Hazuu Tools

HTML Viewer

Preview your HTML in a live sandbox and inspect it with color-coded syntax highlighting.

HTML Input
Preview
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About HTML Viewer

Reading raw HTML source code can be challenging, especially when you need to understand how a page will actually look in a browser. An HTML Viewer bridges this gap by letting you paste any HTML code and instantly see both a live rendered preview and a syntax-highlighted source view, all without leaving your browser.

Our HTML Viewer renders your code in a sandboxed iframe for a safe, accurate preview while also offering a color-coded source view that highlights tags, attributes, and values. Everything runs entirely on the client side — your HTML is never uploaded to any server, making it ideal for previewing sensitive or work-in-progress markup.

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How to Use

01

Enter Your HTML

Paste your HTML code into the input editor on the left, or upload an .html file from your computer.

02

Click Render

Press the "Render" button to generate a live preview of your HTML in a sandboxed iframe.

03

Switch Views

Toggle between "Preview" to see the rendered page and "Source" to view the code with syntax highlighting.

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Frequently Asked Questions

What is an HTML Viewer? expand_more
An HTML Viewer is a tool that lets you paste or upload HTML code and instantly see how it renders in a browser. It combines a live preview with a syntax-highlighted source view, making it easy to inspect, debug, and understand HTML markup.
Is it safe to preview untrusted HTML? expand_more
Yes. The preview runs inside a sandboxed iframe with restricted permissions. Scripts are allowed within the sandbox so CSS and JS render correctly, but the sandbox prevents access to your parent page, cookies, and other browser data.
Does my HTML get sent to a server? expand_more
No. All rendering and syntax highlighting happens entirely in your browser. Your code never leaves your machine, so it is safe to use with proprietary or sensitive markup.
What does the syntax highlighting show? expand_more
The source view color-codes your HTML for readability: tags appear in blue, attribute names in amber, attribute values in green, and comments in gray. This makes it easy to scan and understand the structure of your code at a glance.