Core Web Vitals History

Track LCP, INP and CLS week by week over the last ~6 months of real-user data. See whether a site is getting faster or slower, with the trend per metric. From Chrome CrUX History.

URL or domain

Available for sites with enough real-user traffic. Newer or smaller sites may have gaps or show « no data ».

How the Core Web Vitals History tool works

A single Core Web Vitals snapshot tells you where a site stands today. This tool shows the trend: how LCP, INP and CLS moved week by week over the last ~6 months of real-user data (Chrome CrUX History), so you can tell whether a site is getting faster or slower.

What you get

A line per Core Web Vital (LCP, INP, CLS) across up to 25 weekly data points.
The latest value and its rating (good / needs work / poor) for each.
A trend arrow showing whether the metric improved or regressed over the period.

What you can do with it

Confirm that a performance fix actually moved the needle, catch a slow regression before it costs you rankings, or benchmark how a competitor's real-world speed is evolving. Because it is field data, it reflects real users, not a one-off lab test.

Frequently asked questions

How far back does the history go?

The CrUX History API stores up to 40 weekly collection periods (about 10 months); this tool shows the most recent ~25 (around 6 months). Each point is a 28-day rolling average ending that week.

Why are the first points sometimes empty?

A site needs enough traffic in a given period to be reported. Newer or smaller sites may have gaps at the start of the range.

What does the trend arrow mean?

It compares the earliest and latest values in the range. Because lower is better for LCP, INP and CLS, a downward movement is shown as an improvement.

Is this lab or real-user data?

Real-user (field) data from Chrome, the same source Google Search uses to assess Core Web Vitals.

Data: real Chrome users via the CrUX History API (weekly, 28-day rolling). Free, no API key.