How to Disable Javascript on iPhone & iPad

If you want to turn off Javascript support in Safari for iOS, all you have to do is flip a Setting. Disabling Javascript may be desirable for a variety of reasons, and it’s also a decent trick to speed up web browsing on slower and older iPhones, iPads, and iPod touch models, since it removes some of the more busy and bandwidth heavy aspects of the web.
To disable Javascript any iOS device:
- Open “Settings” and tap on “Safari”
- Locate “Javascript” and flip the switch to OFF
- Exit Settings and relaunch Safari
Active webpages may need to be reloaded for the change to take effect.
Navigating the web with Safari will now be javascript free, which can dramatically impact how some websites function, and don’t be surprised to discover some JS dependent webpages stop working at all. On the other hand, much of the web will be noticeably faster on older iOS devices, since AJAX, some ads, and a slew of other common aspects of the web will no longer load at all.
Not surprisingly Javascript can be easily disabled on desktop browsers too, though the process will be a bit different for each app. Much like on older iOS models, it can also be a helpful way to speed up older Macs and PC’s, though the limited web experience can make it a less than ideal solution.

I would not advise to switch off JavaScript for the following reasons:
1. It’s not the main source of bandwidth load, images can take much more of it easily;
2. Some websites and web apps (if not most of them) will become completely not functional without JavaScript.