CartHacker Core Web Vitals Monitoring

Google uses Core Web Vitals in its ranking systems and recommends good scores for success in Search. This plugin measures all three metrics on your real visitors and shows Core Web Vitals right in your WordPress admin. You'll see whether your site passes the way Google judges it, so you can fix a slow page, or a page that moves while it loads, before you lose visitors from Google. Google's own data comes from the Chrome UX Report behind PageSpeed Insights and Search Console. It covers the last 28 days and only appears once your site has enough Chrome traffic. This plugin starts counting with your first visitor, so you'll know this week whether a new theme, plugin or cache setting made your site faster or slower. It measures Loading (Largest Contentful Paint), Responsiveness (Interaction to Next Paint) and Visual stability (Cumulative Layout Shift) on every real visit and shows pass or fail the way Google judges it: 75% of visits must meet each target. You also get traffic statistics on your visitors, a free weekly report and an email alert when your site gets slower. What you get

• Loading (Largest Contentful Paint): how fast the biggest image or headline appears. Pass: under 2.5 seconds.
• Responsiveness (Interaction to Next Paint): how fast the page reacts to a tap or a click. Pass: under 200 milliseconds.
• Visual stability (Cumulative Layout Shift): how much the page jumps while it loads. Pass: under 0.1.
• Pass or fail for each one, with the share of good visits behind the verdict.
• A daily speed chart that shows the exact day your site got slower.
• Server response time (Time to First Byte): how fast your server starts sending each page, day by day on the same chart.
• Elements that make your pages jump: the parts of the page that moved most on the visits that lost a Good Visual stability score, such as Related products or a cookie banner, and what to do about the first one.
• Traffic statistics: page views, unique visitors, devices, browsers and operating systems, all counted without cookies.
• Your scores on the WordPress dashboard every time you sign in.
• A free weekly report and a slowdown alert by email.

Free and CartHacker Premium The free CartHacker account measures up to 1,000 page views a day and keeps 7 days of speed and traffic history. The weekly report and the slowdown alert are included. CartHacker Premium ($7.99 a month or $79 a year, USD) keeps 180 days of history, measures up to 50,000 page views a day, splits speed by page type, shows real-visitor speed for each of your busiest pages and runs automatic speed reports on your 50 most visited pages at least once a week. You'll see it in this plugin and in the full Core Web Vitals Monitoring report on carthacker.com. The same membership also gives you all 50 trust badges in 30 languages, unlimited PDF tools, 200 tracked QR codes, no ads on CartHacker, new guides 2 weeks earlier and new CartHacker tools as they launch. How it works Once you connect, the plugin adds a small measuring script to your public pages. The script is served from your own site and loads deferred, so it never delays your page. It sends one short report per page view to carthacker.com. The script sets no cookies and stores nothing on the visitor's device. You don't need to add anything to your cookie consent banner. The plugin doesn't count visits from logged-in administrators, editors and authors. That way your own clicks around the site don't change your scores. To count them too, turn on Measure logged-in editors in Site settings on the plugin page. Fonts The plugin screens use two open-source fonts, bundled in assets/fonts: Inter by Rasmus Andersson and JetBrains Mono by JetBrains. Both are free under the SIL Open Font License 1.1. Source code Every file in this plugin is readable source code with no build step. The script that measures your visits is assets/js/ch-monitor.js.

1. Install and activate the plugin from Plugins > Add Plugin.
2. Open CartHacker > Core Web Vitals and press Start free monitoring.
3. Sign in to CartHacker or create a free account, then confirm this site.
4. Open your site in a private window to record the first visit, then press Refresh report.

Already using the CartHacker monitoring snippet in your theme or in WPCode? Remove it after connecting. The script counts each page once even if both are there.

1.1.3

• Autoptimize, LiteSpeed Cache and Cloudflare Rocket Loader leave the measuring script as it is. Before, Autoptimize's Aggregate JS-files option merged it into one combined file, and the site sent no measurements.
• WP Rocket's Delay JavaScript execution, Load JavaScript deferred and Minify JavaScript files options skip the measuring script.
• The home page check names seven more page cache plugins, SiteGround Speed Optimizer and Breeze among them, when the script is not on your home page yet.

1.1.2

• Speed over time draws one line across days and hours without visits. After one quiet day the line goes straight to the next measurement; after several, the last value carries on level until the day before the next measurement, so a quiet week no longer shows as a gap or as a week-long rise or fall.

1.1.1

• Plainer wording on the plugin page and in this readme, for example in the Disconnect window, which now says exactly what happens to the measuring script and to your data.
• The Other plugins page under CartHacker now stays in the menu while another CartHacker plugin is installed but not active, so you can activate it there. Before, the menu item disappeared as soon as the plugin was installed.
• When you install a plugin from the Other plugins page and close its details window, the page reloads, so the plugin card shows Activate instead of Install now.
• The Other plugins menu item no longer disappears for one page load when its list of CartHacker plugins is refreshed.

1.1.0

• New: see which elements make your pages jump. A new section under Speed over time lists up to five elements that moved the most on visits with a Visual stability score below Good, such as related products, the footer or a cookie banner. It shows how often each one moved and when, and how to fix the first one. If nothing moved, it says so.
• The measuring script now records which element moved. It sends only the element's tag, id and class names, never its text.
• Visual stability is now more accurate. Visits where nothing moved were not counted before. They now count with a score of 0, so the result covers every page view.
• Product pages with plain addresses, such as ?product=123 or ?page_id=45, now show as separate pages in the report. Before, they were all counted as the home page.
• The Install now and Activate buttons for other CartHacker plugins are now green, like the plugin's other free actions.

1.0.0

• First release: Core Web Vitals from real visitors, a daily speed chart, traffic statistics, a widget on the WordPress dashboard and, with CartHacker Premium, speed by page type.