how to load all image as webp formate

[AvidBrio]

for all images load as "WEBP" it was an increased site speed too much.  but how i can do on the Shopify liquid 

i refer this shopify article but still image type not webp 
https://www.shopify.in/partners/blog/progressive-jpeg-and-webp

i change the all image  tag with formate pjeg 

<img src="{{image_source| img_url: '800x800', format: 'pjpg' }}" />

[oscprofessional]

@AvidBrio 
Hi,
Please check this link  https://www.shopify.in/partners/blog/progressive-jpeg-and-webp