Hi theplutonium,
Thanks for using Apple Support Communities. It sounds like you’re having trouble with Safari freezing when you try to zoom in on an image. I’m happy to help.
To start, I suggest making sure you’re running the latest iOS version:
Update your iPhone, iPad, or iPod touch - Apple Support
Then, check to make sure you’re using the correct function:
Zoom in on the iPhone screen - Apple Support
Should the issue persist, try clearing your website data in Safari using the steps under “Delete history, cache, and cookies” in the article below:
Clear the history and cookies from Safari on your iPhone, iPad, or iPod touch - Apple Support
Let me know if that helps.
Take care.