Photos should be working. Once the content is extracted the DOM is scanned for images to be downloaded. Images are then size to be 100% width of the screen.
It's looked fine for all the sites, I've used but results can really vary depending where the content comes from.
If you find any sites that aren't displaying correctly, send the urls to support@epub.press and I'll happily dig a little deeper.
All data is anonymous. What's posted back is some URLs.
Individual books can be requested with an email.
I do agree this be more secure though. I'll look for ways of encrypting things and add a privacy statement. Any other suggestions for what would make you more comfortable are welcome.
https://epub.press/