WebP + AVIF + more
Image format adoption stats for 2021
“
How it Works
Chrome UX Report
~7.5 million URLs
3
- which image formats are supported?
http://www.libpng.org/pub/png/
Some quick image stats -
45%
Image Weight
(as a % of page weight)
28%
> 2 MB of images
that’s over 2 million sites!!!
881 KB
Median Image weight
(excluding 1x1 pixels)
100 KB
Median LCP Image Size
September 2021, Mobile
September 2021, Mobile
Popularity of image formats
52K websites, 2K hostnames
1.4 million websites, 440K hostnames
4.9 million web sites, 6.2 million hostnames
5.4 million web sites, 6.7 million hostnames
2 million web sites, 5.1 million hostnames
September 2021, Mobile
Third Parties Serving WebP
Size = % of WebP requests across all sites
50% of requests
440K hostnames
September 2021, Mobile
Third Parties Serving AVIF Images
Size = % of AVIF requests across all sites
September 2021, Mobile
Modern Image formats - not only for the popular sites
September 2021, Mobile
| Sites serving at least 5 of these image formats | ||||
CrUX rank | jpg | png | gif | webp | avif |
<= 1,000 | 459 | 489 | 437 | 188 | 4 |
<= 10,000 | 4,568 | 4,645 | 4,210 | 1,538 | 24 |
<= 100,000 | 44,187 | 47,206 | 35,357 | 12,784 | 170 |
<= 1,000,000 | 469,512 | 480,413 | 274,940 | 108,368 | 1,087 |
<= 10,000,000 | 3,804,023 | 3,481,285 | 1,439,955 | 681,452 | 3,989 |
Grand Total | 4,322,749 | 4,014,038 | 1,754,899 | 804,330 | 5,274 |
AVIF
Chrome 9 - Feb 2011 - partial support
Chrome 32 - Jan 2014 - full support
< 5 requests
326K -> 580K requests
1.4 million requests
Lighthouse Audit added
Safari supports webp
Firefox supports webp
Chrome 85 - Aug 2020
Vimeo
Lighthouse audit updated to include AVIF
HTTP Archive Web Almanac
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