Hope this would help you, regarding Cloudinary. It does require a website to have the multiple images upload function, but at least it’s an idea for your case.
Intro
I thought I was going to publish my first app in the Template store but external sources like Cloudinary integration are not allowed in a template. So after hours spend you will instead see the app here.
Upload multiple images to Cloudinary
Try out version: URL: https://multiupload.glideapp.io/
The app is using my personal Cloudinary account - so please keep uploads in the app low - and use your own Cloudinary account if you are going to do exploration of cloudinary
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