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⚡ Free • Powered by Google PageSpeed Insights

Free Website Speed Test

Check any website's performance score and Core Web Vitals — LCP, CLS, and INP — for both mobile and desktop in seconds. Get a clear score and know exactly what to fix.

Device:

How it works

1

Enter a URL

Paste any public website address and pick mobile or desktop.

2

We analyze it

Google Lighthouse loads the page and measures real performance metrics.

3

Get your score

See a 0–100 score plus color-coded Core Web Vitals and what to improve.

Understanding Core Web Vitals

Core Web Vitals are the user-experience signals Google uses to help rank pages. Here's what each one means and the target you should aim for.

LCP≤ 2.5s
Largest Contentful Paint

How fast the main content loads.

CLS≤ 0.1
Cumulative Layout Shift

How visually stable the page is while loading.

INP≤ 200ms
Interaction to Next Paint

How quickly the page responds to clicks and taps.

Why speed matters for SEO

Quick ways to improve

Frequently asked questions

What is a good website speed score?+
Google's PageSpeed score runs from 0 to 100. 90–100 is fast (green), 50–89 needs improvement (orange), and 0–49 is poor (red). Aim for 90+ on both mobile and desktop, but mobile is the priority since Google uses mobile-first indexing.
What are Core Web Vitals (LCP, CLS, INP)?+
Core Web Vitals are Google's key user-experience metrics. LCP (Largest Contentful Paint) measures loading — aim for under 2.5s. CLS (Cumulative Layout Shift) measures visual stability — aim for under 0.1. INP (Interaction to Next Paint) measures responsiveness — aim for under 200ms.
Does page speed affect SEO and Google rankings?+
Yes. Core Web Vitals are confirmed Google ranking signals and part of the page experience system. Faster pages also reduce bounce rate and improve conversions, which indirectly strengthens SEO. A slow site can lose rankings to faster competitors.
Why is my mobile score lower than desktop?+
Mobile tests simulate a slower CPU and a throttled 4G network to reflect real-world mobile conditions, so scores are usually lower than desktop. Since Google indexes the mobile version of your site first, optimizing mobile speed matters most.
Is this website speed test free?+
Yes — it's completely free and unlimited for visitors. It's powered by Google's PageSpeed Insights (Lighthouse) and works on any publicly accessible URL. No signup is required.
How can I improve my website speed score?+
Compress and lazy-load images (use WebP/AVIF), minify CSS/JS, enable caching and a CDN, reduce third-party scripts, set explicit width/height on media to avoid layout shift, and serve fonts efficiently. Re-run the test after each change to measure the impact.

Related Resources

Want to go deeper on website performance and AI-powered tools? Whether you're a beginner learning how to interpret speed scores or a professional hunting for the best AI tools to streamline your workflow, these resources have you covered. Explore our guides, browse curated AI tool categories, and discover what's new in AI for 2026.