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Test your website's speed on mobile & desktop — real Google Lighthouse scores, real-user Core Web Vitals (LCP, INP, CLS), TTFB & server checks, loading filmstrip, page-weight breakdown, and prioritized fixes.
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Among ToolsMonk's seo tools, Website Speed Test covers a single everyday need: test your website's speed on mobile & desktop — real google lighthouse scores, real-user core web vitals (lcp, inp, cls), ttfb & server checks, loading filmstrip, page-weight breakdown, and prioritized fixes. Open the page and start working, with no download or sign-up standing between you and the result.
People reach for it most often when they need checking whether a site passes core web vitals — a google ranking signal — on mobile and desktop, diagnosing why a page feels slow: server response, oversized images, render-blocking scripts or third-party code, and producing a client-ready pdf speed report with scores, vitals and prioritized fixes. With nothing to install, an unexpected one-off job takes no longer to start than your regular routine.
If you have been searching for website speed test, page speed test, and pagespeed, this page covers those jobs with a clean interface, instant output, and no paywall in the way.
| Price | Free — no signup, no paywall, no watermark |
|---|---|
| Works on | Any modern browser: desktop, tablet, and mobile |
| Processing | Server-assisted — requires an internet connection |
| Account required | None |
| Category | SEO Tools |
Enter the URL and pick the devices to test (mobile, desktop, or both)
Server & delivery checks return in seconds while Google Lighthouse loads the page in a real browser for each device profile
Review the scores, real-user Core Web Vitals, filmstrip, opportunities and page-weight breakdown as each test lands
Work through the prioritized fixes, then re-test and compare against your history — or export the report as PDF/JSON
Real Google Lighthouse runs on both mobile and desktop profiles, in parallel — Performance, Accessibility, Best-Practices and SEO scores per device
Real-user Core Web Vitals from the Chrome UX Report: LCP, INP and CLS with p75 values, pass/fail ratings and full good/needs-improvement/poor distributions
Instant server & delivery checks measured directly (TTFB, redirects, Brotli/gzip compression, caching policy, render-blocking scripts, CDN detection) — results in seconds while Lighthouse runs
Loading filmstrip and final-render screenshot so you can see the page paint over time
Prioritized Opportunities with estimated time/byte savings, plus diagnostics, page-weight breakdown by resource type and third-party blocking analysis
Side-by-side mobile vs desktop comparison, test history, and export as branded PDF report or raw JSON
Checking whether a site passes Core Web Vitals — a Google ranking signal — on mobile and desktop
Diagnosing why a page feels slow: server response, oversized images, render-blocking scripts or third-party code
Producing a client-ready PDF speed report with scores, vitals and prioritized fixes
Verifying that a performance fix actually moved the numbers, using the built-in test history
Website Speed Test is a free online tool on ToolsMonk with a single focus: test your website's speed on mobile & desktop — real google lighthouse scores, real-user core web vitals (lcp, inp, cls), ttfb & server checks, loading filmstrip, page-weight breakdown, and prioritized fixes. Whether you're a professional, student, or casual user, it provides instant, accurate results right in your browser without requiring any software installation or account creation.
The heavy conversion step runs on ToolsMonk's servers over a secure connection, and results are returned straight to your browser. The interface adapts to any modern browser and screen size, so the SEO Tools workflow you rely on at a desk is the same one you get on a tablet or phone.
Website Speed Test measures a page the way Google does. For each device profile it runs a full Lighthouse audit through the official PageSpeed engine — mobile emulates a mid-range phone on slow 4G, desktop a fast connection — returning the Performance score plus Accessibility, Best-Practices and SEO. Alongside the lab run, it pulls the Chrome UX Report: real-user Core Web Vitals (LCP, INP, CLS) from actual Chrome visitors over the last 28 days, which is the data Google's ranking signal uses.
While Lighthouse works (a real browser load takes 15–40 seconds), the tool's second engine answers instantly: a direct request from our servers measures time-to-first-byte, counts redirects, and inspects compression, caching headers, render-blocking scripts, image hygiene and CDN presence. These delivery checks catch the server-side problems that lab tools often bury — and they work even for brand-new pages with no field data.
The report is built for action: Opportunities are ranked by estimated savings with plain-language fixes, the filmstrip shows exactly when the page became visible, the page-weight breakdown shows where the bytes went, and third-party analysis names the scripts blocking your main thread. Testing both devices side by side makes the mobile gap — usually the one that matters for rankings — impossible to miss.
Everything exports: a branded PDF report for clients and stakeholders, or raw JSON for your own tracking. Recent tests are kept in local history so you can confirm a fix actually moved the numbers. For the full picture, pair it with the SEO Checker — speed is one ranking signal; metadata, crawlability and content structure are the rest.
Fix the top Opportunity first — items are ranked by estimated savings, and the biggest one often unlocks several metrics at once
A slow TTFB caps every other metric: no front-end fix can outrun a 2-second server response, so check the server & delivery section first
Re-test 2–3 times before and after a change and compare medians — single Lighthouse runs naturally vary a few points
Common questions about this tool, its workflow, and what to expect before you use it.
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Technical SEO issues silently kill your rankings. Use this comprehensive checklist to audit your website's crawlability, indexability, speed, mobile-friendliness, and security — with free ToolsMonk tools to fix every issue.
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Test your website's speed on mobile & desktop — real Google Lighthouse scores, real-user Core Web Vitals (LCP, INP, CLS), TTFB & server c…
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