Warning: only works in Chrome/Chromium based browsers!
This verson outputs the panoramas in their original resolution, but it might freeze for a few seconds while processing.
Drop a Cardboard Camera image anywhere to convert
or click here to open a file
This site is a sligthly improved version of Google's original tool found here:
All code is available on Github:
Successfully extracted over-under format from Cardboard Camera image!
Download Stereo JPEG
Download MP4 Audio