Can I have my own upload progress bar?

Yes, of course! You can use our Uppy file uploader, which fires events for various stages of an upload and reports the bytes received and expected. This allows you to build very smooth progress bars and even display the upload speed. You can change the CSS and behavior of the progress bar as you see fit.

See also:

Is it possible to get a future Amazon S3 link immediately when I start uploading the file? What happens if my plan limit is reached? How can I test notifications in a dev environment?