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Core Web Vitals monitoring

Core Web Vitals monitoring from your real visitors

Core Web Vitals monitoring tracks how fast and stable your pages are for the people using them. With the TLDTrack snippet on your site, you see LCP, INP, CLS and TTFB from real visitors at the 75th percentile over 30 days, split by mobile and desktop.

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4

real-visitor measures: LCP, INP, CLS and TTFB

p75

the percentile Google rates sites on

30

days of visits behind each figure

90

days of history kept

01 · Real visitors

What the snippet measures

The snippet measures each page view in the visitor's browser and sends one beacon as they leave. Bots and automated browsers are left out.

LCP

Largest Contentful Paint

How long the main content takes to appear. Good is 2.5 seconds or less; poor is over 4 seconds.

INP

Interaction to Next Paint

How quickly the page responds to a tap or click. Good is 200ms or less; poor is over 500ms.

CLS

Cumulative Layout Shift

How much the page moves about as it loads. Good is 0.1 or less; poor is over 0.25.

TTFB

Time to First Byte

How long the server takes to start replying. Good is 800ms or less; poor is over 1.8 seconds.

02 · Lab tests

A weekly PageSpeed run

Every week TLDTrack runs Google PageSpeed Insights on the homepage, on mobile and desktop. It keeps the Performance, Accessibility, Best Practices and SEO scores, the lab timings (LCP, CLS, Total Blocking Time, First Contentful Paint and Speed Index) and a list of fixes ranked by the time they would save. The results build into a 90-day trend.

03 · Alerts

Alerts on a score floor

Set a minimum PageSpeed score for mobile, desktop or both, anywhere from 1 to 100. The default is 50. When the latest weekly run is below your minimum, you get an alert.

Real-visitor figures are there to read in the dashboard and in client reports. They do not raise alerts on their own.

04 · Plans

Which plans include it

Real-visitor figures come from the analytics snippet, which counts page views against your plan's monthly allowance.

Starter10,000 page views a month
Pro100,000 page views a month
Agency500,000 page views a month
FreeNot included

05 · Pricing

Simple, transparent pricing

Every paid plan starts with a 7-day free trial. Cancel during the trial and you won't be charged.

Free forever

Free

Monitor one site, free forever

$0/mo

1 website + 4 extra monitors

No credit card needed

  • Uptime checks every 5 minutes
  • Response time tracking
  • Domain expiry alerts
  • SSL certificate expiry alerts
  • Email alerts
Start free

7 days free

Starter

For individuals & small portfolios

$11/mo

Up to 5 websites

250 monitoring credits / month

  • Uptime, SSL, DNS & blacklist
  • Content & visual change monitoring
  • Accessibility (WCAG 2.2) monitoring
  • Email health & renewal alerts
  • PageSpeed & malware scanning
  • Free WordPress plugin
  • WHM & cPanel monitoring
  • Bulk import & export
  • Security, SEO & compliance scans
  • AI integration (Claude & ChatGPT)
Start free trial

Most popular

Pro

For active managers & agencies

$29/mo

Up to 25 websites

1,250 monitoring credits / month

  • Everything in Starter
  • Up to 5 team members
  • Client report builder
  • AI search visibility
  • Priority support
  • Security, SEO & compliance scans
  • AI integration (Claude & ChatGPT)
Start free trial

7 days free

Agency

For large portfolios & teams

$89/mo

Up to 100 websites

5,000 monitoring credits / month

  • Everything in Pro
  • Up to 20 team members
  • Agency CRM & white-label reports
  • Security, SEO & compliance scans
  • Dedicated support
  • AI integration (Claude & ChatGPT)
Start free trial

Bigger than 100 websites? Our Enterprise plan adds unlimited sites, custom data residency, an SLA, dedicated onboarding and custom integrations. Talk to us

*SMS alerts are an optional add-on on paid plans for UK mobile numbers, paid for with prepaid SMS credit packs. Prices exclude any applicable sales tax. Your card won't be charged during a paid-plan trial. Cancel anytime.

06 · Questions

Frequently asked questions

How is this different from PageSpeed Insights?

PageSpeed Insights times a test page load in a lab. The snippet measures real visits on real devices. TLDTrack shows both: real-visitor figures from the snippet, and a weekly lab run for the scores and fixes.

Do I get an alert when a Core Web Vital gets worse?

Not directly. Alerts come from the minimum PageSpeed score you set. Real-visitor figures are shown in the dashboard and in client reports.

Are the figures per page?

No. Real-visitor figures cover the whole site, and the weekly PageSpeed run tests the homepage.

Will my figures match Google Search Console?

They will be close but not the same. Search Console uses Chrome users over 28 days. TLDTrack uses every visit that loads the snippet over 30 days, and measures INP and CLS slightly more strictly, so those two can read a little worse.

Does it work on single-page apps?

The snippet measures the first page load of each visit. Later route changes inside a single-page app are not measured separately.

What do I need to install?

One script tag on the site, with analytics switched on for the domain. It is the same snippet that powers heatmaps and traffic figures.
Mark Grice, founder of TLDTrack

Mark Grice, founder of TLDTrack. Runs FullyCoded, a Cornwall web agency, and built this to keep 500+ client sites in front of him every day.

What happens next

See your real-visitor numbers

Do it yourself

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Add a site, paste in the snippet and figures start building from the first visit. Your card is not charged for 7 days.

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Talk it through

Arrange a call with Mark

If you would rather talk through how this works across every site you look after, we can go through it together.

Book a call

See every check TLDTrack runs