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HTML viewer

Paste HTML or drop an .html file and see the page rendered as you type, at desktop, tablet or phone width.

Runs in your browser. Nothing you paste is uploaded. You can also drop an .html file onto the code box.

Share this page for commentsTurn it into a review link. People click anything on the page to comment, with no account.

How to use the html viewer

  1. Paste or dropPaste HTML into the code box, or drop an .html file onto it.
  2. See it renderedThe page updates as you type. Switch between desktop, tablet and phone.
  3. Share for commentsTurn it into a review link your team or client can comment on.

What it checks

Live previewThe page re-renders a moment after you stop typing.
Three widthsDesktop, tablet (820 pixels) and phone (390 pixels).
PrivateEverything runs in your browser. The HTML is never sent to us unless you choose to share it.
ScriptsScripts in the page run inside a sealed frame, so they can't touch anything outside it.

What an HTML viewer is for

An HTML file is a web page written as code. An HTML viewer shows you the page that code produces, without hosting it anywhere or opening a code editor. It is handy for checking an email template, a snippet from a developer, a page exported from a design tool, or a whole landing page written by ChatGPT, Claude or Cursor.

Pages written by AI tools

AI tools now write complete web pages in seconds, and they usually hand them over as one block of HTML. Paste it here to see what you actually got before you share it. Look for the things AI pages get wrong most often: made-up facts and prices, links that point nowhere, images that don't load, and layouts that only work on a wide screen. Our guide on reviewing HTML from ChatGPT or Claude walks through a full review.

Tips for pasting HTML

  • Keep it in one file. Styles and scripts written inside the HTML work. Separate CSS or JavaScript files, and images stored on your computer, won't load in any online viewer.
  • Use full image addresses. Images need an address that starts with https://, or need to be written into the file itself.
  • Check the phone width. AI-written pages in particular often forget small screens. Switch to Phone before you send it.

Viewing versus sharing

A viewer is for you. When other people need to see the page and say what they think, you need a link they can open. HTMLAnnotate turns the HTML into a private review link: reviewers click the heading, image or button they mean and type a comment, and every note stays pinned to that spot. Nothing to install and no account for reviewers.

Related guides

Questions

Is this HTML viewer free?

Yes. It runs in your browser, with no signup and no limits.

Is my HTML uploaded anywhere?

No. The preview is drawn in your browser. Your HTML only leaves your computer if you press Get a review link to share it.

Why don't my images or styles show?

Files stored on your computer, such as images or a separate CSS file, can't load in an online viewer. Put styles inside the HTML and use full https:// addresses for images.

Do scripts work?

Yes. Scripts run inside a sealed frame, so the page works but can't affect anything outside the preview.

Can I preview an email template?

Yes, though our HTML email preview is better suited: it shows email widths and can turn images off.

How do I share the page with someone?

Press Get a review link. The HTML becomes a private review link that people can open and comment on, with no account.

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