Images to displayed in photo album, How to reduce images size automaticlly Options

[coding_guy]

Hello,

I need to create a online photo album for a housing community. They would like to have an online photo album to which the members can upload their photos.

The problem I will face is: Most images nowadays, taken on smartphones and digital cameras, are too big for web use (They need to be modified first before uploading to the server).

But, I can't expect people who don't know anything about webdesign how to do it.

I am looking for a way to embed oversize images into a web photo album, but they must be reduced via API (for Example) to a allowable size before shown in the photo album online.


Preferable I would just embed a service like google photos, but the examples I have seen have shown the images in a slideshow; and I don't like a slideshow. I would like to display them next to each other.

What can I do, to reduce image-size before images are displayed in a website, without having to re-size them beforehand via Photoshop?

I would prefer an existing web app, but I could write the code myself as well.


Thank you for your help!