What is a normal program or service for generating assets?

Question

Design

Please advise a normal service for generating assets from a picture. Ideally, it should be possible to upload one large image, specify the required dimensions and format, and then download the cut and compressed images in one archive.

Answer 1

the best service is the service that you wrote yourself according to your Wishlist

Answer 2

www.irfanview.com
www.makeuseof.com/tag/10-useful-commandline-irfanv...
CLI-commands: www.robvanderwoude.com/files/iviewcli.txt

Answer 3

And what does the generator built into Photoshop not suit?
https://www.youtube.com/watch?v=6TRz-gNdQFg
give a name to each picture, then make an empty layer with a name like
default 50%, 100% @2
where, through a comma or through +, specify the desired sizes / prefixes / folders
and it automatically generates everything.