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Website performance scanner

Website Performance Scanner

Seoxpert is a simple website audit platform for small businesses and agencies. It scans for SEO, security, and performance issues in one pass — with a prioritized fix list and a free first scan.

Free first scan · No credit card required

What is a website performance scanner?

A website performance scanner measures how fast pages load and respond. It flags the issues slowing them down. It uses the same metrics Google uses for ranking — Core Web Vitals. Every finding is directly tied to SEO impact. Seoxpert scans every crawled page, not just one. Findings are rolled up by severity. You see the worst offenders first.

Who is it for?

Small business owners, marketers, and agencies. Anyone who needs to know why the site feels slow. And what to do about it. Without reading a Lighthouse waterfall. Developers who want a fast second opinion before launch.

What problem does it solve?

Most performance problems are invisible from the desk. The dev machine is fast. The office network is fast. The browser has the cache warm. Meanwhile a customer on a mid-range Android phone on 4G bails out before the page paints. A performance scanner uses standard thresholds. LCP under 2.5 s. INP under 200 ms. CLS under 0.1. It catches these problems before they cost revenue.

What features are included?

  • Core Web Vitals: LCP, INP, CLS against Google's pass/fail thresholds.
  • Render-blocking analysis: head scripts and stylesheets that delay first paint.
  • Compression: flags text resources served without gzip or Brotli.
  • Caching: weak or missing Cache-Control on fingerprinted assets.
  • Layout stability: images without width and height (CLS contributors), late-loading fonts.
  • Server response: Time to First Byte (TTFB) across every crawled page.
  • Mobile readiness: viewport meta, tap-target sizing, pinch-zoom blockers.
  • Resource weight: uncompressed payloads, redundant scripts, oversized images.

See also: most common performance issues, Core Web Vitals explained.

How much does it cost?

Three tiers, no surprises:

  • Free — $0: 4 scans/month, 1 domain. No card required.
  • Pro — $9.99/month: 100 scans, 10 domains, scheduled scans.
  • Agency — $29/month: 500 scans, 50 domains, priority support, white-label.

Full pricing on the pricing page.

What makes it different?

Single-page scanners like PageSpeed Insights tell you about one URL at a time. Seoxpert crawls the whole site, rolls performance findings up by category and severity, and puts them side-by-side with the SEO and security findings affecting the same pages. Findings come with concrete fix guidance — not just a score, but "remove render-blocking script.js from the head" or "add width/height to these 12 images to stop CLS".

When should someone not use it?

Lab-based scanners predict performance but do not replace real-user monitoring. For sites with large global audiences or critical SLA requirements, pair Seoxpert with a RUM tool (Cloudflare Web Analytics, SpeedCurve, or the Chrome User Experience Report) to see field data broken down by device and geography. Seoxpert tells you what to fix; RUM tells you which fix moved the needle for real users.

Frequently asked questions

Is the performance scanner free?

There is a free tier with no credit card required. Paid plans start at $9.99/month for 100 scans/month across 10 domains.

Does it measure Core Web Vitals?

Yes — LCP, INP, and CLS against Google’s published pass/fail thresholds, reported per crawled page and rolled up site-wide.

Does the scanner check mobile performance?

Yes. Mobile readiness is a dedicated pass inside every scan, covering viewport, tap-targets, pinch-zoom, and mobile-specific CWV behaviours.

Can I schedule recurring performance checks?

Yes. Pro and Agency plans include scheduled scans (daily, weekly, biweekly, monthly) with email summaries so a slow deploy gets caught before someone complains.

Ready to measure your site?

Free first scan · No credit card required