Free PageSpeed Checker

Free Website Speed Test - Check Your Website Performance

Test website performance on mobile or desktop with Google PageSpeed Insights (Lighthouse). See category scores, lab metrics, opportunities, and Core Web Vitals field data when Google has enough Chrome user data.

  • 4
    Lighthouse Categories
  • 100%
    Free to Use
  • 0
    Account Required
  • M / D
    Mobile or desktop test

Run your free website loading speed test

Enter a public URL for an instant website performance analysis. Choose a mobile website speed test or desktop website speed test, then review Lighthouse scores and Core Web Vitals when field data exists.

Test device
Run Full Website Audit

Uses Google PageSpeed Insights lab data. Field Core Web Vitals appear only when Google publishes CrUX data for the URL or origin.

What this free website speed test shows

This website performance checker uses the Google PageSpeed Insights API (Lighthouse). WebFixer is not Google and this is not an official Google product. Enter a URL to run a page speed test online on mobile or desktop and review:

  • Performance score and other Lighthouse category scores (Accessibility, Best Practices, SEO).
  • Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS) when shown.
  • Additional Lighthouse lab metrics such as First Contentful Paint, Speed Index, Total Blocking Time, and Time to First Byte.
  • Opportunities and diagnostics that suggest practical ways to improve loading performance.
  • CrUX real-user Core Web Vitals when Google has sufficient Chrome UX Report data for the URL or origin.

Some real-user metrics may be unavailable for low-traffic or new sites. Lab measurements can still help you debug even when field data is missing.

How to Test Your Website Speed

  1. Enter the full public website URL you want to measure (for example https://example.com/).
  2. Choose Mobile for a mobile website speed test or Desktop for a desktop website speed test.
  3. Complete the security verification when prompted (Cloudflare Turnstile).
  4. Select Analyse Website to run the Google PageSpeed Insights request.
  5. Review category scores, lab metrics, field Core Web Vitals when available, and prioritised opportunities.

Understanding Your Google PageSpeed Insights Score

Lighthouse reports a Google Lighthouse score from 0 to 100 for Performance, Accessibility, Best Practices, and SEO. Google PageSpeed Insights uses these bands:

  • 90 to 100: Good.
  • 50 to 89: Needs improvement.
  • 0 to 49: Poor.

Scores are diagnostic lab measurements. They can change between tests because of network simulation, server response time, third-party scripts, ads, caching, and A/B tests. Treat a single run as a snapshot, not a guarantee.

Understanding Core Web Vitals

Core Web Vitals describe real-user experience when Google publishes field data in CrUX. WebFixer labels field metrics separately from Lighthouse lab values so you do not mix measurement types.

  • Largest Contentful Paint (LCP): How long the main content takes to appear. Good field threshold: 2.5 seconds or less.
  • Interaction to Next Paint (INP): Responsiveness to user input. Good field threshold: 200 milliseconds or less.
  • Cumulative Layout Shift (CLS): Visual stability while the page loads. Good field threshold: 0.1 or less.

Lab LCP, INP, and CLS from Lighthouse simulate a controlled load. Field LCP, INP, and CLS reflect aggregated Chrome user experiences over time. Both are useful, but they answer different questions.

Mobile vs Desktop PageSpeed Tests

Mobile tests apply slower network and CPU throttling and often reflect how most search and social traffic arrives. Desktop tests use different assumptions and may score higher even when phone users see slower loads. Run both when you maintain separate templates, heavy mobile-only scripts, or when most conversions happen on one device type.

This tool tests one URL at a time, requires a reachable public HTTP(S) URL, and depends on Google PageSpeed Insights availability and quota. Estimated savings from opportunities are guidance, not guaranteed speed gains. Login-only pages, geo-blocked content, and heavy personalisation may not match what Google's runners see.

Related WebFixer tools

Pair speed work with the Website Audit for metadata, headings, HTTPS, security headers, robots.txt, sitemaps, and optional browser checks on the same URL. Use DNS Lookup to verify hosting and mail records, the Robots.txt Generator to manage crawl rules, the XML Sitemap Generator to build or validate sitemaps, and the llms.txt Generator for AI discovery files.

What this website performance test measures

Lighthouse categories, Core Web Vitals when field data exists, and practical performance opportunities from Google PageSpeed Insights.

Lighthouse performance score

Lighthouse scores

Performance, Accessibility, Best Practices, and SEO scores from 0-100 with clear good / needs improvement / poor bands.

Run a test
Core Web Vitals field data

Core Web Vitals

LCP, INP, and CLS from CrUX field data when available, clearly labelled separately from lab measurements.

Check vitals
Lab performance metrics

Lab metrics

FCP, Speed Index, Total Blocking Time, TTFB, and lab LCP to understand simulated load behaviour.

Learn more
Performance opportunities

Opportunities

Prioritised Lighthouse audits such as image optimisation, render-blocking resources, and unused JavaScript.

See opportunities
Mobile website speed test

Mobile or desktop

Run a mobile website speed test (default) or switch to desktop strategy to match how you expect traffic to arrive.

Choose device
Full website audit

Full Website Audit

Combine PageSpeed with on-page SEO, robots.txt, sitemap, security, and optional browser checks in one report.

Website Audit
Website performance

Why Website Speed Matters

Faster pages tend to feel more trustworthy, reduce bounce on slow connections, and support mobile usability. Speed is one factor among many that search engines may consider, but WebFixer does not promise ranking changes from a higher PageSpeed score alone.

Regular website performance analysis helps you catch regressions after theme updates, new analytics tags, image uploads, or hosting moves. Measuring before and after a change makes it easier to justify optimisation work to stakeholders.

Run a free website speed test

How to Improve Website Speed

Use Lighthouse opportunities as a prioritised backlog, then validate improvements with another test. Common wins include:

  • Optimise images and serve modern formats such as WebP or AVIF where supported.
  • Reduce unnecessary JavaScript and defer non-critical scripts.
  • Minimise render-blocking CSS and JavaScript on the critical path.
  • Use browser caching and sensible cache headers for static assets.
  • Enable compression (for example Brotli or gzip) at the server or CDN.
  • Improve server response times (TTFB) with better hosting, caching, or database tuning.
  • Audit third-party tags (ads, widgets, chat) and remove what you do not need.
  • Use a content delivery network (CDN) when visitors are geographically spread out.
  • Optimise web fonts and inline only critical above-the-fold CSS.

For crawlability and on-page issues that can affect how Google discovers your pages, follow up with the Website Audit.

Frequently Asked Questions

Answers about this free website speed test, Google PageSpeed Insights, and Core Web Vitals on WebFixer.

Yes. WebFixer.dev offers a free website speed test with no account required. You enter a public URL, complete the security check, and run a mobile or desktop test using Google PageSpeed Insights data.

Yes. WebFixer is not Google and this is not an official Google product. WebFixer calls the Google PageSpeed Insights API on the server and displays Lighthouse results in a clear report on WebFixer.dev.

Lighthouse category scores use a 0 to 100 scale. Google labels 90 to 100 as good, 50 to 89 as needs improvement, and 0 to 49 as poor. Scores are diagnostic lab measurements and can vary between runs.

Mobile tests use slower simulated network and CPU conditions. Mobile layouts often load more scripts, larger images, or heavier third-party tags. Desktop tests can look faster even when real users on phones struggle.

Core Web Vitals are real-user experience metrics Google publishes in Chrome UX Report data when enough traffic exists. They include Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS). WebFixer labels field data separately from Lighthouse lab metrics.

Lighthouse runs in a controlled lab environment, but results still vary with network simulation, server response time, ads, A/B tests, and caching. Run several tests and focus on consistent opportunities rather than a single number.

No. Faster pages help usability and conversions, and speed is one of many signals Google may consider. WebFixer does not guarantee rankings, traffic, or Core Web Vitals passing in Search Console.

CrUX field data needs enough anonymous Chrome users visiting the URL or origin. New sites, staging URLs, or low-traffic pages often have no field LCP, INP, or CLS. Lab Lighthouse metrics may still appear.

Test after meaningful changes such as a theme update, new plugins, ad tags, or hosting moves. Many teams check key templates monthly or before major releases. WebFixer caches results for 30 minutes per URL and device to reduce repeated API calls.

How to read PageSpeed results

Understand Lighthouse lab scores, CrUX field Core Web Vitals, and prioritised opportunities without mixing measurement types.

Lighthouse category scores

Scores are lab-based - Performance, Accessibility, Best Practices, and SEO reflect a simulated Lighthouse run.

Field Core Web Vitals

Field vitals are labelled - LCP, INP, and CLS from CrUX are shown only when Google publishes real-user data.

Compare mobile and desktop

Compare strategies - Re-run the test on mobile and desktop to see different bottlenecks.

Pair with Website Audit

Pair with a full audit - Speed is one signal; combine with SEO and crawl checks on the same URL.

Need on-page checks too?

WebFixer's free Website Audit complements PageSpeed with metadata, links, crawlability, and optional browser checks.

Analyse My Website

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