MAKE YOUR WEBSITE
INSANELY FAST.
Precision performance analytics for engineering teams.
Measure Core Web Vitals, Lighthouse, and server latency in real-time.
The Toolkit
Everything you need to debug performance.
Mobile Simulation
Rigorous testing on emulated 4G networks to ensure your site performs in the harshest conditions.
Vitals Intelligence
Deep dive analysis into LCP, CLS, and INP metrics with actionable code-level fix recommendations.
SEO Health
Correlate speed metrics with search ranking potential to justify engineering efforts to stakeholders.
Optimization Loop
Stop guessing. Start measuring. Follow our three-step process to perfection.
Measure
Input your domain and let our cluster run a full audit.
Analyze
Identify bottlenecks in the waterfall and main-thread.
Iterate
Deploy fixes and re-run tests to verify improvements.
Industry playbooks
Outcomes you can defend in the boardroom
We stress test the flows that matter: onboarding, PDPs, paywalls, and everything in between. Each report links a performance regression back to revenue so prioritization feels obvious.
SaaS & PLG
Measure how onboarding flows behave on throttled networks, then ship guided remediation to keep trial-to-paid conversions intact.
E-commerce
Audit PDPs with inventory-sized imagery, flag personalization scripts that block rendering, and sync fixes directly to merch calendars.
Media & Publishing
Balance ad-monetization with vitals by simulating staggered tag waterfalls and enforcing CLS budgets across every template.
Tool Comparison
Best Website Speed Test Tools Compared
See how MakeWebsite.fast stacks up against other popular speed testing tools like Google PageSpeed Insights, GTmetrix, and WebPageTest.
| Feature | MakeWebsite.fast | PageSpeed Insights | GTmetrix | WebPageTest |
|---|---|---|---|---|
| Core Web Vitals Testing | ||||
| Real User Data (CrUX) | ||||
| Lighthouse Performance Score | ||||
| Mobile + Desktop Tests | ||||
| Compare Multiple URLs | ||||
| TTFB Checker Tool | ||||
| DNS Lookup Tool | ||||
| Free Unlimited Tests | ||||
| No Account Required | ||||
| Clean Developer-Focused UI |
Trusted by Engineers
What Developers Are Saying
Join thousands of developers and engineering teams who use MakeWebsite.fast to optimize their web performance.
“Finally a speed test tool that doesn't overwhelm you with data. Clean interface, actionable insights, and the comparison feature is invaluable for client work.”
“We switched from GTmetrix to MakeWebsite.fast for our CI/CD pipeline. The API is lightning fast and the Core Web Vitals data is exactly what Google sees.”
“The TTFB checker and DNS lookup tools saved us hours debugging a CDN misconfiguration. Essential toolkit for any performance-focused team.”
Why Trust Us
Built for Performance-Obsessed Teams
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Questions
Everything startups ask us
Still unsure how to bring Core Web Vitals, SEO, and experimentation under one roof? Start with the answers below and talk to us when you are ready for dedicated support.
What is a website speed test?+
A website speed test analyzes how quickly your web pages load. It measures Core Web Vitals like LCP (Largest Contentful Paint), CLS (Cumulative Layout Shift), and INP (Interaction to Next Paint), plus additional metrics like TTFB and FCP. These metrics directly impact your Google search rankings and user experience.
How does MakeWebsite.fast measure website speed?+
We use Google PageSpeed Insights API combined with Chrome User Experience Report (CrUX) real-user data. This gives you both lab data (controlled tests) and field data (actual user experiences) in one comprehensive report.
What are Core Web Vitals and why do they matter?+
Core Web Vitals are Google's key metrics for measuring user experience: LCP (loading performance), INP (interactivity), and CLS (visual stability). Since 2021, they've been a Google ranking factor, meaning better scores can improve your search visibility.
Is MakeWebsite.fast free to use?+
Yes! Our speed test tool is completely free with unlimited manual tests. You get full Core Web Vitals analysis, Lighthouse scores, and actionable recommendations at no cost.
How often should I test my website speed?+
We recommend testing after every deployment and at least weekly for production sites. Regular monitoring helps catch performance regressions before they impact your SEO rankings or conversion rates.
What is a good website speed score?+
A Lighthouse performance score of 90+ is considered excellent, 50-89 needs improvement, and below 50 is poor. For Core Web Vitals: LCP should be under 2.5s, INP under 200ms, and CLS under 0.1.
Can slow website speed affect SEO?+
Absolutely. Google uses page experience signals (including Core Web Vitals) as ranking factors. Slow sites often see lower rankings, higher bounce rates, and reduced conversions. Studies show a 1-second delay can reduce conversions by 7%.
What's the difference between mobile and desktop speed tests?+
Mobile tests simulate a mid-tier device on a 4G connection, while desktop tests use more generous CPU and network settings. Mobile scores are typically lower due to these constraints. Since Google uses mobile-first indexing, mobile performance is especially important.