Website Speed Test
Test how fast your website loads.
Test how fast your website loads.
This free Website Speed Test from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.
How to use the Website Speed Test
- Enter the URL or domain.
- Pick the depth or check options if the tool supports them.
- Run the audit - results stream in as each check completes.
- Export the report or fix the issues flagged.
What you can do with the Website Speed Test
- Pre-flight a new website before going live.
- Quick monthly health check on client sites.
- Diagnose why a page is slow or returning errors.
- Verify redirects after a domain or URL migration.
Why use KX Toolkit's Website Speed Test
- Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
- Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
- Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
- Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
- One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.
Tips for the best results
Always run an audit BEFORE you publish, not after - most issues are easier to fix while the page is still in staging.
Related Website Management Tools
If you find this tool useful, explore the full Website Management Tools collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.
What page load time should I aim for in 2026?
Target Largest Contentful Paint (LCP) under 2.5 seconds, First Input Delay (FID) under 100ms, and Cumulative Layout Shift (CLS) under 0.1. These are Google's Core Web Vitals thresholds. Mobile load time should be under 3 seconds; users abandon at around 3.5 seconds. Sites in the fastest 10% of their industry see noticeably higher conversion rates. Use 75th-percentile field data, not lab tests, because real users on slow networks reveal what synthetic tests miss.
Why does my site test fast in tools but feel slow to users?
Tools measure from datacenter servers with fast, stable connections. Real users browse on 4G mobile networks, older devices, and varied geographies, which can triple the experienced load time. Always check field data via Google Search Console's Core Web Vitals report or Chrome User Experience (CrUX) data, which captures actual user metrics. Lab data is useful for diagnostics, field data is what Google uses for ranking. Optimize for the slowest 25% of your audience, not the median.
What are the most common causes of slow page loads?
In order of frequency: unoptimized images (40-60% of page weight), render-blocking JavaScript and CSS, third-party scripts like ads, analytics, and chat widgets, slow server response (TTFB > 600ms), and lack of caching or CDN. Hero images that are not lazy-loaded or compressed are the single biggest culprit on most marketing sites. Audit the waterfall chart to spot the longest-running requests, then attack the top three before micro-optimizing further down.
Will faster page speed actually improve my rankings?
Speed is a confirmed Google ranking factor through Core Web Vitals, but it is a tiebreaker, not a primary signal. Two pages with similar relevance and authority will see the faster one rank higher, but speed alone will not lift weak content. The bigger ranking benefit is indirect: faster sites have lower bounce rates, more pageviews per session, and higher conversion rates, all of which Google reads as quality signals. Aim for speed as part of a complete UX strategy.
How often should I run a website speed test?
Run a quick test weekly on key landing pages and a deep audit monthly across all template types (home, category, product, blog post). Always re-test after deploying new code, adding third-party scripts, or changing themes. Set up automated monitoring via tools like SpeedCurve or Calibre to catch regressions within hours, not weeks. A common pitfall is assuming speed is stable; in reality, marketing tags, A/B test scripts, and ad networks add weight constantly.
What is the difference between TTFB, FCP, and LCP?
Time to First Byte (TTFB) is how long the server takes to send the first byte of HTML, ideally under 200ms. First Contentful Paint (FCP) is when the browser renders any text or image, target under 1.8s. Largest Contentful Paint (LCP) is when the main visible element finishes painting, target under 2.5s. TTFB is server-side, FCP and LCP are client-side. Slow TTFB usually means hosting or backend issues; slow LCP usually means oversized images or render-blocking resources.
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