Lighthouse + Core Web Vitals

Lighthouse audits on autopilot.

Desktop and mobile scores for every page, tracked over time, with a clear list of what to fix first. No more pasting URLs into PageSpeed Insights.

14 days freeNo cardResults in about a minute
UpCrawler Lighthouse audit: performance 94, SEO 98, accessibility 96, best practices 100, Core Web Vitals and 28-day score history
Desktop vs mobile

Same site. Two very different scores.

Lighthouse tests mobile on a slower device and network, so it is usually where you lose points. See both from the same audit.

Score history

Catch a regression the day it ships.

Every audit is saved, so a slow deploy shows up as a dip on the chart, not as a traffic drop weeks later.

  • 28 days to months of history for all four scores.
  • Per device, so a mobile-only slowdown can’t hide.
  • Week-over-week change next to every score.
UpCrawler Lighthouse score history over 28 days with lines for performance, SEO, accessibility and best practices
See your own desktop and mobile scores.Every page, tracked over time. Ready minutes after you verify your site.
Opportunities

Know exactly what to fix next.

Lighthouse findings land in one list with the affected pages, and turn into ready-made AI prompts.

  • Grouped by category: performance, accessibility, SEO.
  • Affected pages listed for every finding.
  • Step-by-step guides for Next.js, WordPress and Shopify.
UpCrawler Lighthouse opportunities and diagnostics: contrast could be improved, eliminate render-blocking resources
AI fix promptDefer non-critical CSS and JS on 1 page to speed up first paint…
Every page

Not just your homepage.

PageSpeed Insights tests one URL at a time. UpCrawler crawls your whole site and shows performance for every page, so the slow ones can’t hide.

  • Score and response time per page, sortable.
  • Export to CSV for your team or clients.
  • Search by URL or page title.
UpCrawler Lighthouse pages table: 30 pages crawled, 28 indexable, 6 with issues, with score and response time per page
Why not just PageSpeed Insights?

Great for a spot check. Not for keeping a site fast.

PageSpeed InsightsUpCrawler
Pages testedOne URL at a timeEvery page, every crawl
RunsWhen you rememberAutomatically, on a schedule
Score historyNone28 days and beyond
AlertsNoneIn-app and email
What to fixGeneric listPrioritized, with AI prompts
PriceFreeFree plan available
The metrics, explained

What each number means.

Your Lighthouse performance score is a weighted mix of five metrics. Here is what they measure and the target for a good score.

Swipe to explore1 / 5
LCPCore Web Vital

Largest Contentful Paint

When the main content appears.

Good≤ 2.5 sScore weight25%
TBTINP proxy

Total Blocking Time

How long scripts block clicks and taps. The lab stand-in for INP.

Good≤ 200 msScore weight30%
CLSCore Web Vital

Cumulative Layout Shift

How much the page jumps while loading.

Good≤ 0.1Score weight25%
FCP

First Contentful Paint

When the first text or image shows up.

Good≤ 1.8 sScore weight10%
SI

Speed Index

How quickly the page visibly fills in.

Good≤ 3.4 sScore weight10%

Weights from Lighthouse 10. Good thresholds from Google’s Core Web Vitals and Lighthouse docs (mobile).

FAQ

Lighthouse questions, answered.

Is this the same Lighthouse as PageSpeed Insights?
Yes. UpCrawler runs Google’s Lighthouse, the same engine behind PageSpeed Insights and Chrome DevTools, so the scores are comparable.
Why is my mobile score lower than desktop?
Mobile audits simulate a mid-range phone on a slower connection, so heavy images and scripts cost more. Fix those first and both scores rise.
Does UpCrawler measure INP?
Lab audits can’t record real taps, so we show Total Blocking Time as the closest lab signal. Real-user INP comes from Search Console once it’s connected.
How often do audits run?
Automatically, on a schedule set by your plan. The pricing page shows how often each plan runs them.

More answers in Support, or email support@upcrawler.com

Let’s get you to 90+!Crawly, the UpCrawler mascot

See your Lighthouse scores in about a minute.

Desktop and mobile, every page, with a to-do list of what to fix first.

14 days freeNo cardNothing to install

More of UpCrawler

All features
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Your whole site at a glance

Health, uptime, speed, open issues and Search Console, ready every morning.

UpCrawler overview dashboard: site health 99 of 100, uptime 99.97%, load time 0.6 s, 6 open issues, 16.35K clicks and top queries
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Rankings next to issues

Clicks, impressions, CTR and position from Search Console.

UpCrawler Search Console: 16,354 clicks, 203.91K impressions, 8.0% CTR, average position 11.2 and a 28-day chart
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Alerts before customers notice

Downtime, slow responses and SSL expiry, by email.

UpCrawler notifications: new critical issues, slow response, Lighthouse issues resolved, report ready, site back online, site down
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