Free tool
Speed → Revenue calculator
Enter a URL. We pull your real-user speed from Google's field data and price what a faster page is actually worth to your revenue — in dollars, not vague promises.
Free tools
Free web performance tools
Free tools built on the same data and evidence standards as the audit and our published research — no made-up multipliers, no folklore numbers. Pull your real-user speed, price it in revenue, simulate a fix, size a budget, and check your measurement is sound. No paywall, no email gate.
Free tool · members
Fix Simulator
Stop guessing whether a change will help. Toggle a hypothetical fix and measure the real before-and-after with Google's own PageSpeed data — predicted vs. measured, side by side.
Free tool
Performance budget calculator
A TCP-aware budget: how many kilobytes and requests you can afford before your target device blows past your speed goal — not a round number pulled from thin air. Optionally start from your URL: your real users' p75 for context, your measured TTFB prefilled.
Free tool
PageSpeed cloaking test
Is a site serving a faster page to Google's crawler than to real users? This probes for PageSpeed cloaking and shows the gap — yours, or a competitor's.
Free tool
Lighthouse required-runs calculator
“The score went up two points” usually isn't evidence. This measures your page's real run-to-run variance (a short PSI pilot, per metric — score, LCP, TBT, FCP, CLS), tells you how many runs a claim actually needs, writes the experiment protocol — and takes your before/after Lighthouse JSONs for a per-metric statistical verdict: real improvement, regression, or within noise.
Want the full picture?
The tools each answer one question. The expert audit answers all of them for the page that earns your money — every finding backed by your own markup, every fix a concrete code change. Curious how we know what we know? Read the research.