Is your Tracking destroying your core web vitals score?

Find out and keep your site running at its best!

Understand the tracking impact on your website
The more tests you do the more accurate the result will be. If you do more then one test the result will be the median of all tests. If you want to do >5 tests you need a license key.
If you want to have a more accurate result, you need a license key as doing the tests and crawling generates cost. Thanks for your understanding.
You can use 'no Banner', but then you get two similar results: Both with not clicking a banner, so only very little tracking.
Add here a CSS selector to get the "Accept All" button of the cookie banner. Must work with document.querySelector("example").click(). Example input: button[id='btn-accept-banner']
Select this option if you want to assess the impact of your current tracking implementation on your Lighthouse scores.
Provide an regex for example: /launch/g
The Features

Compare Lighthouse Scores

Ever wondered what impact a specific tracking provider has on your web core vitals score? This tool answers this question. Comparing lighthouse web core vitals results of your web page with and without any tracking tag.

Impact of Google Tag Manager

Measure the impact of Google Tag Manager on your lighthouse web core vitals. It compares the score and web core vitals of your page with and without Google Tag Manager.

Remove randomness

Remove the randomness of the result by increasing the number of tests. For multiple tests the mean of the web core vital score is compared.

Compare Google Tag Manager Versions

Compare two different Google Tag Manager Implementations with the setting "inject GTM Id to compare". With that you can see the impact of changes before you put them to live. Or compare an old version of the Google Tag Manager with the current one to see changes in time.

Free web core vitals comparison

You can always create a free test for your web page and compare the web core vital numbers with and without tracking. Save the URL of the result for having access to to older results.

Fast test result

It is annoying being forced in a queue and wait for an hour just to get the web core vitals for your website. This is why our tool executes the lighthouse tests on your website really fast. We did our best to increase the speed of testing.

No e-mail required

You do not need to create an account or share you e-mail address. We understand that sharing your e-mail address is a sensitive matter.

Example Lighthouse comparison result

URL
Tests
Cookie Banner
Finish Time
Results not meaningful!

The cookie banner was not found! The crawler was unable click the "accept" button on the Cookie Banner, which indicates that the resulting data may not accurately reflect the values int the results, as it is likely that only minimal tracking is being performed, or none at all, if the Cookie Banner has not been accepted.

Results not meaningful!

The crawler was unable to block any request! This happens if the regex you provided did not match any request on the page, so both versions show the original variant of your page. Please adjust the regex.

Test with blocked gtm.js

Web Core Vitals metrics

Original website

Web Core Vitals metrics