Chart.js vs uPlot
Head-to-head usage across the sites we track.
Top sites by authority
Chart.js · uPlot · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
51
1
Open Page Rank 8+
874
2
Open Page Rank 7+
3,052
2
Open Page Rank 6+
5,320
3
Open Page Rank 5+
8,413
5
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Chart.js · uPlot · share of sites in each country using one or the other
United States
47,410
11
India
24,979
9
Germany
21,175
9
Italy
20,268
4
Spain
18,944
4
United Kingdom
18,448
8
Brazil
17,645
5
France
17,424
4
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Chart.js | uPlot |
|---|---|---|
| LCP | 2.2 s | 1.7 s |
| INP | 75 ms | 125 ms |
| CLS | 0 | 0 |
| TTFB | 1000 ms | 500 ms |
Median site's p75 values from the Chrome UX Report, Sep 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.