Free Core Web Vitals Test

Test your CWV metrics in most browsers on desktop and mobile devices.

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Improve site health through Core Web Vitals

Gather important insights into your website’s Core Web Vitals (CWV) health with Google Chrome. Uptrends’ free CWV tool reports critical metrics like Google PageSpeed Score and can suggest performance improvements.

Spend time fixing unoptimized pages and improving SEO, not trying to interpret unorganized data. Uptrends reports your Google Core Web Vitals and W3C navigation timing metrics within visually-rich, colorful waterfall reports and Timeline screenshots.

The metrics FPC monitors monitor: FCP, LCP, TTI, TBT and CLS.

Largest Contentful Paint

Largest Contentful Paint (LCP) may sound overly abstract, but it simply refers to how fast meaningful content loads on your page. In particular, the time it takes for the largest single element to render on the page. To meet Google’s user experience standards, page content must load in less than 2.5 seconds. Anything slower affects your LCP score.

First Input Delay

First Input Delay (FID) measures the time it takes for a browser to respond to a site visitor’s first interaction with the site while the site is loading, also called Input Latency. User interaction can be anything from tapping a button, a keypress, clicking on a link and the resulting response. FID also measures other types of interactions, like Text input areas, dropdowns, and checkboxes.

Cumulative Layout Shift

Have you ever start reading an online article when something suddenly changes on the page? Cumulative Layout Shift (CLS) measures every unexpected layout shift that occurs during the lifespan of the page. Having page elements shift too much while a user is trying to interact with it leads to a bad user experience.

Time To Interactive

Measuring Time To Interactive (TTI) is important because some sites optimize content visibility at the expense of interactivity. This can create a frustrating user experience: the site appears to be ready, but when the user tries to interact with it, nothing happens.

Total Blocking Time

The Total Blocking Time (TBT) metric measures the total time between the First Contentful Paint (FCP) and the Time to Interactive (TTI). Any task that runs more than 50ms is considered “blocked”, which your users will perceive as a sluggish or unreliable.

Test CVW on mobile devices

Google ranks your page on its mobile speed, and mobile Internet users have surpassed desktop users to the tune of almost 15 billion devices. Get CWV mobile performance results for 3G and 4G. If you don’t know the bandwidth connection supported by your carrier, select “native speed” from the pulldown menu.

Get the same metrics from the free CWV tool reported by the desktop test using the Chrome browser. Select from dozens of supported devices and wireless bandwidths. We’ve got the most popular devices built right in for your testing — and we’re still adding more.

Full Page Check and Lighthouse DevTools comparison

Worldwide monitoring

Check CWV results in hundreds of global locations

The free CWV tool lets you choose from ten worldwide locations (sign up and get access to 231 checkpoints). We locate our checkpoints on the ground in or near the cities where your users live, so you get performance data that mirrors your users' experience. Spot latency problems and fix them they affect the user experience.

View how your website performs from multiple worldwide checkpoints.

Better Core Web Vitals metrics equals better SEO

Slow mobile experiences can easily hurt your website’s Google’s rankings. That’s because Google evaluates your site’s mobile experience and uses your score when deciding where you rank for a keyword. Even if you have the best content, poor mobile CWV metrics can drag you down.

Optimize with Google PageSpeed Insights

Everyone loves a fast-loading website; in fact, fast loading pages lead to higher conversions, reduced bounce rates, and better user retention. The Core Web Vitals test tool can steer you in the right direction with optimization suggestions you need to focus your efforts to get the best results.

Share your website speed test results

Do you need to save your results for later or share them with someone else to see your test results? Use the Share results button and copy a shareable link to your clipboard. Send test result link to team members using your favorite communication channels.

View Full Page Check metrics in custom tiles

The Full Page Check monitor with the browser type Chrome with extra metrics measures extra data for Core Web Vitals and W3C navigation timings. This data can now be shown on dashboards in a custom report tile of the type Simple data list/ chart.

Start monitoring your Core Web Vitals

Good CWV benchmarks are essential for better SEO and brand awareness. Don’t let your page performance hold you back. Try Uptrends free for 30 days, without obligations. No commitment and no credit card required.

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