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We are using a paid script to handle image uploads to our platform - Filepicker 2.0 (by Hazzard). This is inspired/similar to an open-sourced version called 'jQuery File Upload' by BlueImp. The Blueimp version allows you to configure client side image compression prior to upload, so that you can upload smaller files (less bandwidth), rather than compressing on the server side after uploading. The Filepicker (our script) does not include this functionality - we need it.
Filepicker 2.0 - Basic UI Plus (what we use) - [login to view URL]
jQuery File Upload (similar) - [login to view URL]
We will provide the Filepicker source and you can set it up locally using a fresh copy, we don't need any customisation to other features or the server side, we just need the 'upload' function to pass the compressed image (done on client side once the image(s) is added to the list), rather than the full size original.
Please look at the demo before committing to this task - [login to view URL]