No extension needed

Bookmarklet — Audit Any Page

Drag the button below to your bookmarks bar. Click it on any page to run a full performance audit — scripts, resources, Core Web Vitals, and third-party impact — all from a single click.

Drag this to your bookmarks bar:

WebVitals Audit

Click won't work — you must drag it to the bookmarks bar.

How to use

  1. 1
    Drag the green button above to your browser's bookmarks bar. If the bookmarks bar is hidden, press Ctrl+Shift+B (Windows/Linux) or Cmd+Shift+B (Mac) to show it.
  2. 2
    Navigate to any website you want to audit — WordPress, Shopify, custom-built, anything.
  3. 3
    Click the bookmarklet in your bookmarks bar. A small green indicator appears in the top-right corner while data is being collected.
  4. 4
    Wait a few seconds for the audit to finish. The indicator shows progress as it collects, sends, and processes the data.
  5. 5
    Your dashboard opens in a new tab with a full breakdown of scripts, resources, third-party domains, and actionable recommendations.

Works on any website, not just WordPress. The bookmarklet uses standard browser Performance APIs, so it works wherever you can open a web page.

How it works

Collects locally

The bookmarklet runs entirely in your browser. It reads the DOM and the Performance API to inventory every script, stylesheet, image, font, and third-party resource on the page, along with Core Web Vitals (FCP, LCP, CLS).

Sends to our API

The collected report is POST-ed to our server as JSON. No cookies, credentials, or personal data are sent — only the performance inventory of the page you audited.

Builds your dashboard

The server processes the data and generates an interactive dashboard. A new tab opens automatically with your full audit report, including prioritized recommendations.