# Web projects and preview

> A Web project runs in your own browser rather than a sandbox. What the preview renders, why there is no Run button, and what that means for what you can build.

Source: https://www.revquix.com/docs/projects/web-projects-and-preview
Last verified: 2026-09-03

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**If your HTML page is blank, or there is no Run button on your web project**, this page explains
both. A **Web** project is HTML, CSS and JavaScript, and it does not go to a sandbox. It renders in your
own browser, live, in the preview pane.

## There is no Run button

There is nothing to press because there is nothing to send. The preview updates from your files - the
preview _is_ the run.

## The preview renders the entry file

It renders the project's **stored entry file** and nothing else changes that.

> **Warning** - This is the one place the open file does not decide
>
> Everywhere else, Run follows the file you are looking at. Here it deliberately does not. A preview
> that followed the open tab would show `about.html` while the tree still marked `index.html` as the
> entry - a preview that disagrees with what a static host would actually serve is a preview that
> lies.

To preview a different page, set it as the entry from the file tree.

## What you can build

Everything a static page can do: your own scripts, your own styles, `fetch` to public APIs, browser
storage.

What you cannot do is anything needing a server - there is no backend, no build step and no package
install. A framework that requires bundling before it runs will not run here.

## Debugging

The preview is a real frame in your real browser, so your browser's own developer tools work on it.
That is usually a faster read than anything the workspace could show you.

- [Running your code](https://www.revquix.com/docs/projects/running-your-code) - How every other kind runs.

- [Sharing a project](https://www.revquix.com/docs/projects/sharing-a-project) - Letting somebody else see it.