# W3Test

> W3Test is a free website speed, SEO, accessibility and performance testing platform powered by Google Lighthouse. Paste any public URL to receive a detailed audit with category scores, Core Web Vitals, resource breakdowns and prioritized fixes. No registration is required.

W3Test reports include a 0-100 score for Performance, Accessibility, Best Practices, SEO and PWA, plus Largest Contentful Paint (LCP), Interaction to Next Paint (INP), Cumulative Layout Shift (CLS), total page size, request inventory, detected technologies and estimated savings for each optimization.

## Core tools
- [Website Speed Test](https://www.tools.w3test.com/website-speed-test): Measure load speed, performance score and Core Web Vitals.
- [SEO Checker](https://www.tools.w3test.com/seo-checker): Audit titles, meta tags, headings, links and structured data.
- [Website Performance Test](https://www.tools.w3test.com/website-performance-test): Full Lighthouse performance audit with opportunities.
- [Core Web Vitals Test](https://www.tools.w3test.com/core-web-vitals-test): Check LCP, INP and CLS against Google thresholds.
- [Accessibility Checker](https://www.tools.w3test.com/website-accessibility): WCAG-oriented accessibility review.
- [Website Security Test](https://www.tools.w3test.com/website-security): Review HTTPS, security headers and mixed content.
- [Website Monitoring](https://www.tools.w3test.com/website-monitoring): Scheduled automated performance monitoring and trends.
- [What Is My IP](https://www.tools.w3test.com/what-is-my-ip): See your public IP and look up any IPv4 or IPv6 address with location, ISP and ASN.
- [Compare Websites](https://www.tools.w3test.com/compare): Benchmark two websites side by side.

## Content
- [Sample Report](https://www.tools.w3test.com/sample-report): A full example W3Test report.
- [Frequently Asked Questions](https://www.tools.w3test.com/faq): Answers about performance testing, Core Web Vitals, SEO and accessibility.
- [About W3Test](https://www.tools.w3test.com/about): Mission and how the tool works.
- [Blog](https://www.tools.w3test.com/blog): Tutorials and insights on web performance, SEO and accessibility.
- [Contact](https://www.tools.w3test.com/contact): Support and feedback.

## Optional
- [Sitemap](https://www.tools.w3test.com/sitemap.xml): XML sitemap of all public pages.