Shrink images before upload

Uploading a full snapshot with full image sizes can be slow.

What are my options for shrinking before upload?

https://www.symphonythemes.com/drupal-blog/drupal-dropzonejs

https://www.drupal.org/project/image_style_on_upload
Will this help when uploading multiple images at once to media library?

https://www.drupal.org/project/image_resize_filter
What are the limitations of this?

https://www.drupal.org/project/image_resize
Resize existing styles?

https://www.drupal.org/project/file_resup
Resumable uploads, could help with large files?
Would prefer faster upload time.

TODO: Document this situation and how to fix.