Lighthouse · Core Web Vitals · PageSpeed

Bulk Lighthouse MonitoringDid your site slow down after the last deploy?

psiLynx monitors Core Web Vitals and Lighthouse scores across all your pages, so you catch regressions before Google or your clients do.

Mobile and desktop included
Advanced recommendations
CrUX History

What is psiLynx?

psiLynx is a bulk Lighthouse auditing and Core Web Vitals monitoring tool for developers, SEO teams, and agencies. It runs Google PageSpeed Insights audits across hundreds or thousands of URLs at once, on both mobile and desktop, and tracks how every page performs over time.

Bulk Lighthouse audits across hundreds or thousands of URLs, on mobile and desktop
Core Web Vitals history per page: LCP, CLS, INP, FCP, and TTFB
Real Chrome user field data (CrUX) shown alongside lab scores

Regression alerts by email when a score drops past your threshold
The specific issues behind each score, ranked by impact
Scheduled audits and client reports you can share as a link

The same Lighthouse engine as Chrome, run through the official PageSpeed Insights API. No local installation, and free to start.

Sound familiar?

The problems psiLynx was built to solve

Developers & Teams

You deployed. The site slowed. You found out two weeks later, from a client complaint.

Every deploy is a blind spot. Regressions go undetected until the damage is done.

SEO Specialists

200 pages. PSI checks one at a time. Which ones are failing Core Web Vitals right now?

You can't fix what you can't see. At scale, manual checking isn't an option.

Agencies

Every Monday: copy scores into a spreadsheet, explain the numbers to the client.

Manual reporting is a cost you carry invisibly, every single week.

Batch check · agency-client.com

Progress847 / 1000 URLs

85% complete~2 min remaining

agency-client.com/home✓ 91

agency-client.com/about✓ 78

agency-client.com/services⟳ Running

agency-client.com/blog· Pending

agency-client.com/contact· Pending

✓ 847 done · ⟳ 1 running · · 152 pendingMobile + Desktop

⏱

~4.5 hrs saved

vs manual checks · 1000 URLs

1,000 pages audited in about 20 minutes.

At scale, manual PageSpeed checks aren't an option. psiLynx runs Lighthouse across your entire URL list at once, on mobile and desktop, so you always have a complete picture.

Import URLs manually, via CSV, sitemap, or JSON, then run the whole list with one click.
Every URL is checked on both mobile and desktop in the same run, so one batch covers both.
Results update in real time as the batch runs, so you can close the tab and come back later.

example.com/home · Performance

↓ Regression detected

Before deploy

91

After deploy

64

After fix

90

⚠️Regression detected2 min ago

Performance dropped 91 → 64 since last run

example.com/home · Mobile · LCP +2.1s

Catch performance regressions before users do.

Every deploy risks a performance drop. A slowed LCP costs conversions. A CLS spike hurts rankings. psiLynx tracks metric history per URL and flags the pages where results dropped.

Full history of every metric per URL: Performance, LCP, CLS, INP, FCP, and TTFB.
A trend chart makes it easy to line up a score drop with the release window it appeared in.
Automated email alerts when a result drops past the threshold you set.

Issues · /checkout 3 issues found

HIGH Render-blocking resources LCP +1.4s

3 scripts in <head> delay first render for all users. Affects 100% of page loads.

→ Add defer to analytics.js, tag-manager.js, chat-widget.js

MED Images not lazy-loaded +340KB initial

14 below-fold images loaded immediately. Add loading="lazy" to reduce initial payload.

LOW No explicit font-display CLS +0.08

Font swap causes layout shift on load. Add font-display: swap to @font-face declarations.

Get the fix, not just the score.

Every check surfaces the exact issues behind a score and ranks them by impact, so you get a short list to act on instead of raw JSON or a 90-page audit.

Every check lists the diagnostics behind the score, so you can see what is slowing the page down.
Issues are ranked by impact, so the HIGH ones come first and the LOW ones stay out of your way.
Each issue comes with a specific fix rather than a vague instruction to improve performance.

Everything you need to monitor Core Web Vitals at scale

Bulk Lighthouse

Run mobile and desktop Lighthouse audits across your entire URL list at once. Import via CSV, sitemap, or paste. A batch of 1,000 URLs finishes in about 20 minutes.

CrUX Field Data

See what Google measures for rankings: real Chrome user data rather than a simulated lab test, wherever CrUX has enough traffic for the page. Field metrics update automatically every week from the Chrome UX Report.

Issues & Recommendations

After every check, psiLynx lists the issues it found and ranks them by impact, so you start with the one costing you most.

Regression Alerts

Set a score threshold and get an email the moment a URL drops below it. Catch a drop at the next scheduled run instead of at the next client review.

Shareable Reports

Every project report has a public shareable link. Your client opens it in a browser and sees the full scores, trends, and Core Web Vitals data without creating an account.

Scheduled Checks

Automate audits on a daily, weekly, or custom schedule. Results are waiting the next time you open the dashboard.

Free plan · No credit card required

Stop finding out from clients. Start monitoring performance.

Your first audit takes 5 minutes. Import a URL list or sitemap, and see exactly where your Core Web Vitals stand.