Free Page Speed Test: Check Your Core Web Vitals in Seconds

Your website speed affects everything: search rankings, user experience, and conversion rates. A one-second delay in page load time can reduce conversions by 7% and increase bounce rates by 11%. Yet most website owners have never tested their Core Web Vitals, or they tested once and forgot about it.

FixRoast offers a free page speed test that checks all four Core Web Vitals categories, explains what each metric means in plain English, and gives you prioritized, step-by-step fixes.

What Are Core Web Vitals?

Core Web Vitals are a set of specific metrics that Google uses to measure real-world user experience on your website. They became an official ranking factor in 2021 and have grown more important every year since. Here are the four key metrics you need to know.

LCP (Largest Contentful Paint)

LCP measures how long it takes for the largest visible element on your page to finish loading. This is usually a hero image, a video thumbnail, or a large block of text. It represents the moment when the user feels the page has "loaded."

• Good: Under 2.5 seconds
• Needs improvement: 2.5 to 4.0 seconds
• Poor: Over 4.0 seconds

LCP is typically the hardest metric to optimize because it depends on server speed, image sizes, and render-blocking resources. For a detailed guide on fixing LCP issues, read our step-by-step LCP optimization guide.

CLS (Cumulative Layout Shift)

CLS measures visual stability. Have you ever tried to click a button, only to have it jump down the page because an image or ad loaded above it? That is layout shift, and it frustrates users.

• Good: Under 0.1
• Needs improvement: 0.1 to 0.25
• Poor: Over 0.25

Common causes include images without dimensions, dynamically injected content, and web fonts that cause text to reflow.

INP (Interaction to Next Paint)

INP replaced First Input Delay (FID) in March 2024 as the responsiveness metric. It measures how quickly your page responds to user interactions like clicks, taps, and keyboard input. While FID only measured the first interaction, INP tracks all interactions throughout the page lifecycle.

• Good: Under 200 milliseconds
• Needs improvement: 200 to 500 milliseconds
• Poor: Over 500 milliseconds

Heavy JavaScript execution and long main-thread tasks are the most common causes of poor INP scores.

TTFB (Time to First Byte)

TTFB measures how long it takes for the browser to receive the first byte of data from your server. While not an official Core Web Vital, TTFB directly impacts LCP because nothing can render until the server responds.

• Good: Under 800 milliseconds
• Needs improvement: 800ms to 1.8 seconds
• Poor: Over 1.8 seconds

Slow TTFB usually points to server-side issues: slow databases, missing caching, or distant server locations without a CDN.

Why Core Web Vitals Matter for SEO and Conversions

Google has confirmed that Core Web Vitals are a ranking factor. Pages that pass all three thresholds (LCP, CLS, INP) receive a ranking boost compared to pages that fail. But the impact goes beyond SEO.

Conversion impact by the numbers:

• Pages loading in 1 second convert 3x more than pages loading in 5 seconds
• A 0.1-second improvement in LCP correlates with an 8% increase in conversions for retail sites
• Mobile users are 5x more likely to leave a site that takes over 3 seconds to load

Speed is not just a technical metric. It is a business metric.

How to Use FixRoast's Free Speed Test

Testing your site takes less than 30 seconds:

1. Go to the FixRoast Page Speed Test
2. Enter your URL
3. Choose mobile or desktop analysis (or both)
4. Click "Run Test"

Within seconds, you will get a complete breakdown of all four performance categories: Performance, Accessibility, Best Practices, and SEO.

What Makes FixRoast Different from Google PageSpeed Insights

Both tools use the same underlying Google Lighthouse API, so the raw data is identical. The difference is in how FixRoast presents and explains that data.

Google PageSpeed Insights gives you:

• A single performance score
• Technical audit names like "Eliminate render-blocking resources"
• Raw metric values without context
• One category at a time

FixRoast's speed test gives you:

• All four categories (Performance, Accessibility, Best Practices, SEO) in one view
• AI-powered explanations in plain English for every issue
• Step-by-step fix instructions with code examples
• Priority ranking so you know what to fix first
• Tech stack detection to tailor recommendations to your platform (WordPress, Next.js, Shopify, etc.)

For a detailed side-by-side comparison, see our PageSpeed Insights vs FixRoast comparison.

Quick Wins to Improve Your Score

If your test results are not where you want them, here are five quick wins that improve most sites:

1. Compress and resize images. Use WebP or AVIF format and serve images at the exact dimensions needed. Try our free image optimizer to compress images without losing quality.
2. Enable browser caching. Set cache headers so returning visitors do not re-download static assets.
3. Remove unused JavaScript. Audit your third-party scripts and remove any that are not essential.
4. Use a CDN. Serve your assets from edge locations close to your users to reduce TTFB.
5. Preload your largest image. Add a <link rel="preload"> tag for your hero image to start downloading it earlier.

Test Your Site Now

Your landing page might be losing visitors and search rankings right now because of speed issues you do not know about. The fix starts with measurement.

Run the free FixRoast Page Speed Test and get your results in seconds. If you want a complete analysis of your landing page including design, copy, UX, and performance, try our full landing page roast.