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PulseDev for plain HTML.Click it, fix the CSS.

Click any element on your running page and say what’s wrong. Your agent opens the HTML or stylesheet behind it, and a reload shows the edit before you approve the diff.

Download for macOSSetup guide

No framework or build step needed.

PulseDev on a running HTML site: the Growth plan button is outlined with its selector, and a comment box asks the agent to restyle it.

One minute of setup.
None of it ships.

Paste one tag into index.html and start your dev server. Keep the PulseDev app open while you work; it runs the server the widget talks to.

  1. Add

    Paste the script tag.

    Put it in index.html, the layout every page shares. Remove the tag before you deploy.

    index.html
    <!-- just before </body>, dev only -->
<script src="http://localhost:3899/widget.js" data-token="YOUR_TOKEN"></script>
  2. Run

    Start any dev server as usual.

    The widget shows up in the corner of every page. Click it, then click the element you want changed.

    terminal
    $npx serve
    ➜Local:http://localhost:3000/
    ➜PulseDev:widget connected

It fits how
plain HTML works.

A click carries more than a selector. The page, the element and its selector go to your agent, which follows them to the right file.

  • CSS Selector Resolution

    PulseDev maps every element to its CSS selectors, specificity chain, and source file automatically.

  • Computed Styles Viewer

    See the full cascade of applied styles for any element, including inherited and overridden rules.

  • Auto-Audit

    PulseDev flags contrast, spacing, and accessibility issues automatically, even before you ask.

  • Zero Config

    No plugins, no packages, no config files. Just serve your site and connect PulseDev.

HTML questions.

Do I need a framework?
No! PulseDev works with plain HTML, CSS, and JavaScript. No framework or build tool required.
Which dev servers are supported?
Any local server works: npx serve, Live Server, Python http.server, PHP built-in server, or any other tool that serves on localhost.
Does it support CSS preprocessors?
Yes, PulseDev works with Sass, Less, PostCSS, and vanilla CSS.
Is there a performance overhead?
PulseDev only runs in development. It does not affect your production site.

Not every project
is plain HTML.

All 13 setup guides

Your page is running.Go point at the bug.

Download for macOS

Windows coming soon. Free to start.