LCP, INP, CLS: check in minutes whether your site meets Google's performance standards, on both mobile and desktop — no account required.
Initializing…
Understanding the topic
Core Web Vitals are three official Google metrics used to measure a page's loading experience:
The time it takes to display the largest visible element on the page (often an image or a headline). Target: under 2.5 seconds.
How responsive the site is to interactions (clicks, taps, typing). Target: under 200 milliseconds.
Visual stability during loading — prevents an element from shifting under the user's cursor. Target: under 0.1.
These three metrics are officially part of the page experience signals Google factors into its rankings.
An often-misunderstood point
PageSpeed Insights (and our tool, which builds on it) provides two types of measurements. Lab data comes from a simulated test, under controlled and reproducible conditions — useful for precisely debugging an issue. Field data (CrUX) comes from the real experience of actual Chrome users, aggregated over the last 28 days — and it's this second source, when available, that Google actually uses for ranking.
Our audit shows both whenever they exist, so you can tell a theoretical problem apart from one your visitors are actually experiencing.
The details
Both contexts are tested independently — results can differ noticeably between the two.
Heavy images, render-blocking scripts, poorly loaded fonts: concrete improvement opportunities are listed out.
With a free account, follow how your scores evolve after each optimization or update.
Frequently asked questions
Our audit folds Core Web Vitals into a broader analysis (technical SEO, security, accessibility, structured data...) with a prioritized action plan, rather than an isolated score.
Yes, Google has officially confirmed it: they're part of the page experience signals factored into rankings.
Both, analyzed separately — mobile results are generally more demanding.
Yes, with a free account you can track how your score evolves over time.
