⚡ Page Speed Analyzer — Lighthouse & Web Vitals

Run real Google Lighthouse audits at scale — Core Web Vitals, performance scores, accessibility, SEO, and ranked optimization opportunities — for any URL, with pay-per-audit billing.

📊 Sample Output

What it does

This Actor runs a full Google Lighthouse audit against any public URL and returns the same metrics you'd get from running Lighthouse in Chrome DevTools — performance score (0–100), Core Web Vitals (LCP, FCP, CLS, TBT, SI), accessibility score, best-practices score, SEO score, and a ranked list of optimization opportunities with estimated savings.

It runs real Lighthouse 12.x as a subprocess against bundled Chromium inside the Actor container — it does not depend on the Google PageSpeed Insights public API (whose anonymous quota is permanently 0 and which Google has effectively deprecated for unauthenticated callers). You always get a real audit, even on URLs that PSI refuses to score.

If you do have a Google PageSpeed Insights API key, you can pass it as googleApiKey for a faster path (~5–15s vs ~30–90s for in-container Lighthouse). Most users don't need this.

Buyers use this for site-wide performance monitoring, pre-launch QA, SEO audits, agency client reports, and Core Web Vitals regression tracking after deploys.

Use cases

• Bulk site audits — feed a list of URLs from a sitemap and audit every page
• Performance regression monitoring — schedule daily runs to catch deploys that tanked LCP
• Agency client reports — generate Lighthouse data for monthly performance reviews
• Pre-launch QA — score every page on staging before pushing to production
• Core Web Vitals tracking — measure LCP/CLS/INP trends over time across your top pages
• Competitive benchmarking — audit competitor sites alongside your own for sales decks

Inputs

Field	Type	Required	Default	Description
url	string	yes	https://www.example.com	Full URL to audit (must include scheme)
strategy	string (enum)	no	mobile	mobile (slower 4G + lower-end CPU profile) or desktop (faster hardware profile)
categories	string (CSV)	no	PERFORMANCE	Comma-separated list — any of PERFORMANCE, ACCESSIBILITY, BEST_PRACTICES, SEO, PWA. Multiple = more thorough but slower.
googleApiKey	string (secret)	no	—	Optional Google PSI API key for the faster REST path (~5–15s instead of ~30–90s). Get a free key (25,000 queries/day).

Output

{
  "url": "https://www.shopify.com/pricing",
  "strategy": "mobile",
  "auditedAt": "2026-05-23T14:22:11Z",
  "method": "lighthouse-local",
  "scores": {
    "performance": 78,
    "accessibility": 92,
    "bestPractices": 96,
    "seo": 100
  },
  "coreWebVitals": {
    "lcp": { "value": 2.8, "unit": "s", "score": 0.72 },
    "fcp": { "value": 1.4, "unit": "s", "score": 0.91 },
    "cls": { "value": 0.04, "score": 1.0 },
    "tbt": { "value": 220, "unit": "ms", "score": 0.65 },
    "si":  { "value": 3.1, "unit": "s", "score": 0.83 }
  },
  "opportunities": [
    { "title": "Reduce unused JavaScript", "estimatedSavingsMs": 1240, "displayValue": "Potential savings of 380 KiB" },
    { "title": "Properly size images", "estimatedSavingsMs": 680, "displayValue": "Potential savings of 220 KiB" }
  ]
}

Pricing

Pay-per-event: $0.02 per audit result, plus a tiny $0.00005 per-GB Actor Start charge. A typical single-URL audit costs ~$0.02 total. There's no monthly minimum — you only pay for audits that actually complete.

Comparison

Provider	Cost per audit	Notes
NexGenData Page Speed Analyzer	$0.02	Real Lighthouse 12.x, no API key required, pay-per-audit
GTmetrix Pro	$14.95/mo for 4,500 tests (~$0.0033/test)	Cheaper per audit but requires monthly commitment; UI-first, scripting requires API tier
WebPageTest API	$0.005–$0.05 per test (tier dependent)	Very feature-rich; requires API key + WPT account; minimum monthly commits at scale
Lighthouse CI / self-hosted	"Free" (infrastructure cost only)	Real cost is server time + maintenance; no pay-per-run cleanliness
Google PSI public API	Free (with key)	25K/day quota, sometimes refuses scoring, no scheduling/dataset infrastructure

Use this Actor when you want zero infrastructure, pay-per-audit billing, and a real Lighthouse audit (not the PSI API) wired into Apify's scheduling, retries, and dataset storage.

Cross-links

Other NexGenData SEO & performance tools you may want to chain with this:

• SEO Site Auditor — on-page SEO audit (titles, meta, headings)
• Broken Link Checker — crawl and flag 404s
• Sitemap Crawler — pull all URLs from a sitemap to feed into this audit
• Schema Markup Validator — validate JSON-LD/microdata
• SERP Keyword Tracker — pair perf data with rank movement

🚀 New to Apify?

Don't have an Apify account yet? Get $5 in platform credit to try this Actor and 30,000+ others — no credit card required.

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NexGenData — thenextgennexus.com

💰 Pricing Example

This actor uses Pay-Per-Event pricing — you only pay for results.

• Typical run (small): 100 results × $0.02 = $2.00
• Medium run: 500 results × $0.02 = $10.00
• Large run (power user): 2,000 results × $0.02 = $40.00

Free Apify accounts get $5/mo in platform credit. A typical SEO + web performance workflow at this scale typically exceeds the free credit — upgrade to a paid Apify plan for unrestricted use.

🔗 Related Actors

Pair with these for a complete workflow:

• 💡 Lighthouse Bulk Checker — Performance at Scale — full Lighthouse audit (performance, SEO, accessibility, best practices)
• 🧱 Wappalyzer Replacement — Tech Stack Detection API — detect the full tech stack on any website (CMS, analytics, frameworks)
• 🔍 Tech Stack Detector — BuiltWith Alternative — bulk tech-stack profiling for a list of company domains
• 🔍 SEO MCP — AI Website Auditing & Analysis — MCP server bundling 15+ SEO + web-performance tools for AI agents

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