How to Generate an Image URL Using Auto=Format

Hi, quick question:when generating a url for my images in the front-end there’s the option to use

auto=format

to automatically use

webp

as image format if the browser supports it. is there a way to specify a fallback format (eg i want to use

jpg

if the original image file is uploaded as

png

) if the browser doesn’t?

Nah. If you want to use JPG because your image doesn’t need transparency, upload it as JPG in the first place instead of PNG. 🙂 The tool cannot know whether you need the transparency or not, and there is no argument to enforce a format as far as I know.

you can force formats with the urlBuilder

$urlFor(image.asset).format('jpg')

and a lot of clients just want to be able to upload images no matter the format. transparency doesn’t matter in most cases. (but i would generally agree
🙂)

Oh that's neat, I forgot about the URL builder. I wasn't aware, apologies. Thanks Bastian! ❤️

Not that I am aware of , no. Outside of the

auto

or

fm

URL parameters there isn't anything like what you are asking for to my knowledge.

You may be able to handle this depending on use case through client side logical conditionals, but this is not ideal from what you are seemingly looking for 🙇‍♂️

it probably doesn’t even matter anyway. the 2.5 people still using a browser that doesnt support webgl probably have different problems than downloading 200kb more because they are being served a PNG instead of a JPG… 😄 thanks