Free Tool
Core Web Vitals Checker
Start with fast performance signals now, then plug Lighthouse/PageSpeed data into the same report structure later.
What this tool checks
Run one URL scan and get a complete report.
- Initial response time
- HTML weight
- Script count
- CSS count
- Image count
- Lazy-loading signals
How it works
The scanner fetches the public page, follows a limited redirect chain, collects headers/resources/HTML, applies self-owned detection rules, checks SEO/security/accessibility/performance signals, and returns evidence-backed fixes.
Private IPs, localhost, file URLs, and internal hostnames are blocked to reduce SSRF and abuse risk.
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