Private browser-based HTML preview

HTML Viewer

Paste HTML, make a quick edit, and see the result right beside your code. Everything runs in your browser, with no account or upload needed.

Local previewYour code stays in this browser. The preview runs in an isolated frame.

Update preview while I type 0 lines, 0 characters

Your code

HTML editor

Tip: include a complete document when you want to test page-level styles, metadata, or scripts.

Rendered result

Live preview

Use only code you trust. Scripts run inside the preview frame and can still request external URLs included in your HTML.

Ready for HTML.

A quick HTML preview without the setup

HTML Viewer is for the small, useful moments: checking a snippet from a teammate, trying a layout idea, reviewing an email fragment, or seeing how markup behaves before moving it into a project. Paste a complete page or a small section, then update the preview when you are ready.

Write and see it together

The editor and result sit side by side on larger screens, so you can trace a change from markup to rendered page without bouncing between tabs or windows.

Useful for real snippets

Test headings, forms, tables, inline CSS, responsive rules, and lightweight JavaScript. Use the formatter to make pasted markup easier to scan before you edit it.

Private by default

Your code is not submitted to Compare2Lists. Opening a file reads it directly from your device, and saving creates a download from the text currently in the editor.

How to use the HTML Viewer

Paste or open your HTML. Bring in a full HTML document, a component, or a small experiment from a local .html file.
Check the preview. With automatic updates on, the result refreshes shortly after you stop typing. You can also use Refresh preview whenever you prefer to control the update.
Polish or keep moving. Format the markup, copy it back to your project, or save the current version as an HTML file.

HTML Viewer FAQ

Does HTML Viewer upload my code?

No. Your HTML is rendered by an isolated preview frame in your browser. Compare2Lists does not send the editor contents to a server.

Can I use CSS and JavaScript?

Yes. Put CSS inside a style tag and JavaScript inside a script tag, just as you would in a normal HTML file. The preview is sandboxed away from this site.

Why might an external image, font, or API not work?

External resources follow their own security and CORS rules. A service can choose to block requests from a sandboxed preview, even when the HTML itself is valid.

Is this a full code editor or hosting service?

It is a quick local viewer for testing a self-contained HTML document. It does not save projects, publish pages, or replace a development server.

Can I download the HTML I write?

Yes. Use Save HTML to download the current editor contents as an .html file from your browser.