[scaturr]

Yes. Absolutely. The library includes a blob() function for converting a watermarked image to a blob for use with FormData. The site has a demo that does just this for uploading to S3. Any browser supporting File API, FormData, and typed arrays should have no problems. IE 10 is the earliest IE that supports these APIs out of the box, but there are polyfills for IE9. The other modern browsers have supported these APIs for a while now.

[dspillett]

Interesting. I didn't realise those things had progressed so far into "generally stable and usable" territory client-side - an occupational hazard due to most of our clients being stuck on IE8 so I only play with less ancient "standards" when I find time for projects outside the day-job. I really need to try arrange some proper play time for myself soon!