Hi experts.
Okay - so I realise online there are a number of PSD to PNG convertors where you upload your source file, type in the size properties etc and it will create a PNG to your specs (Similar to the below).

I would like to have something similar on our website, which not only allows the user to specify the file sizes, but also to be able to combine different images.  For example, it would include a logo layer as standard, optional to have transparent or include background layer, and then maybe a character/icon as extra too, to work around the logo.  Is this kind of functionality available anywhere do you know?  Thank you so much!! 🤞