See speed as a trend.
A single score tells you little. History charts show whether pages are getting faster or slower, and when the change happened.
- Daily results for tracked URLs
- Charts for every metric
- Mobile and desktop side by side
PageSpeed monitoring for your key pages
Test your important URLs with Lighthouse every day, keep the history and get alerted when a release makes a page slower.
TL;DR
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What is PageSpeed monitoring?
PageSpeed monitoring runs performance tests on a schedule so you see changes over time instead of one-off scores. BigRank runs Lighthouse with headless Chrome on your tracked URLs and stores every result.
- How often are pages tested?
- Daily for tracked URLs, plus on demand when you want a fresh test.
- Mobile or desktop?
- Both. Each result is shown for mobile and for desktop.
- What do I get from each test?
- The Lighthouse performance score, FCP, LCP, CLS, TTFB, TBT and Speed Index, each rated Good, Needs improvement or Poor.
- Can tests run after a deploy?
- Run a test on demand after each release. Planned: a deploy hook, called from CI, Vercel or Netlify, that triggers the re-test for you.
How PageSpeed monitoring works
Scores are only comparable when test conditions stay the same. Every run uses Lighthouse in headless Chrome, on mobile and desktop, with limited concurrency per server, so day-to-day changes come from your pages.
Lighthouse runs
Open-source Lighthouse runs in headless Chrome, with limited concurrency per server so results stay consistent.
- Open-source Lighthouse
- Headless Chrome
- Limited concurrency per server
Mobile and desktop
Every tracked URL is tested for both device types.
- Both devices for every URL
- Results side by side
- History kept for each device
Performance score
Get the Lighthouse performance score along with FCP, LCP, CLS, TTFB, TBT and Speed Index.
- Lighthouse performance score
- FCP, LCP, CLS and TTFB
- TBT and Speed Index
Opportunities list
See what to fix and the estimated savings from Lighthouse's opportunities.
- Lighthouse opportunities
- Estimated savings per item
- A starting point for developers
History
Charts show how every metric changed over time, with a verdict for each URL.
- Score timeline per URL
- Charts for every metric
- The day a change happened
Regression alerts
Get notified when Core Web Vitals regress on a tracked URL.
- In-app notification center
- Email alerts
- Checked after every daily run
Metric ratings
Each metric is rated Good, Needs improvement or Poor, and every URL gets an overall verdict.
- Good, Needs improvement or Poor
- A rating for each metric
- A verdict for each URL
On-demand tests
Run a fresh test whenever you need one, without waiting for the daily run.
- Daily runs for tracked URLs
- Extra runs whenever you ask
- Stored in the same history
Know what to fix.
The Lighthouse opportunities list names the changes with the biggest estimated savings, so developers can start with the best candidate.
- Opportunities with estimated savings
- Good, Needs improvement and Poor ratings
- A verdict for each URL
Catch slowdowns between releases.
Daily runs and regression alerts show when a page slows down. A deploy hook that re-tests after each deploy and marks it on the charts is planned.
- Daily runs for tracked URLs
- Regression alerts by email
- Planned: deploy markers on charts
SEO MCP
Ask your AI assistant about PageSpeed Monitoring.
Ask your assistant for a page's latest mobile and desktop scores, which tracked URL scores lowest, or how its LCP and TBT look.
From first test to alerts
Monitoring works when it runs without you. Set up the pages once, fix the biggest opportunities, then let daily tests and alerts tell you when something slips.
Choose your URLs
Pick the pages that matter, such as the homepage, product pages and top landing pages.
Read the first results
Check the performance score and metric ratings for mobile and desktop.
Fix the top opportunities
Work through the Lighthouse opportunities with the biggest savings.
Let monitoring watch
Daily runs and regression alerts tell you if performance slips again.
When teams monitor page speed
Daily speed tests matter most where performance can change without warning: after releases, on landing pages that carry traffic, when new third-party tags appear, and in client reports.
Release safety
Run an on-demand test after each release and compare it with the day before.
Landing page tuning
Track the pages that carry paid or organic traffic.
Third-party script audits
Notice when a new tag slows pages down.
Client reporting
Add Core Web Vitals to a white-label report.
Choose the right check for speed and availability
Use PageSpeed Monitoring for daily Lighthouse scores and opportunities, Core Web Vitals for lab and real-user ratings of LCP, CLS and INP, and Uptime Monitoring to know whether the site responds at all.
PageSpeed Monitoring
Test your key URLs with Lighthouse every day on mobile and desktop, with score history, opportunities and regression alerts.
Core Web Vitals
Rate LCP, CLS and INP on key pages from lab tests and real-user data, with a Good, Needs improvement or Poor verdict.
Uptime Monitoring
Check your site at your plan's interval for status, response time and SSL expiry, with incidents confirmed from a second location.
Keep going
Look past the performance score
A score is a summary. Compare it with real-user vitals, find the heavy images behind slow loads, and watch response time and uptime for the same site.
PageSpeed Monitoring FAQ
Answers about URL limits, lab versus real-user data, on-demand tests, consistent results, where score drops show up and your result history.
How many URLs can I monitor?
25 URLs per project on Pro and unlimited on Max and Ultra.
Are the results lab data or real-user data?
Lighthouse tests are lab data. Real-user INP, LCP and CLS come from the tracking script in Web Analytics.
Do I have to wait for the daily run?
No. You can also run a test on demand.
Why run tests with limited concurrency?
So that results from different runs stay consistent and comparable.
Where do I see when a score dropped?
On the history chart for that URL, which plots every daily run. Regression alerts also reach you in the app and by email.
Can I see how a page scored last month?
Yes. Every result is stored, and the history charts show each metric over time.
SEO that fits your budget
Plans start at $19/month with a 7-day free trial. Every plan includes the site audit, Search Console insights and white-label reports.