About W3Test

Making website performance testing accessible for everyone.

We believe every website deserves to be fast.

W3Test is a free, open, and powerful website performance testing tool powered by Google Lighthouse. We started W3Test because website performance tools were either too expensive, too technical, or too convoluted for everyday website owners. We wanted to build something simple: paste a URL, get a clear report, and know exactly what to fix.

Our Mission

Our mission is to help every website owner - from freelancers and small businesses to large enterprises - understand and improve their website's performance, accessibility, and search visibility. We believe that a faster, more accessible web benefits everyone.

Free Forever

Performance testing should be free. No paywalls, no trial limits, no credit card required.

Powered by Lighthouse

Built on Google Lighthouse, the industry-standard open-source auditing engine trusted by developers worldwide.

Actionable Results

Reports aren't just scores - they're prioritized, actionable fixes you can implement today.

How It Works

1

Enter Your URL

Paste any publicly accessible website URL into the test form on our homepage.

2

We Run a Lighthouse Audit

Our servers run headless Chrome with Google Lighthouse, measuring real metrics for your page across five categories.

3

Review and Improve

Get a comprehensive report with scores, detailed metrics, and prioritized recommendations. Fix, re-test, and watch your scores climb.

Ready to test your website?

It's free, takes 30 seconds, and gives you everything you need to start improving.

Test Your Website Now