iOS: Safari on iOS doesn’t support extensions, which is annoying if you want to quickly send a page to a read-it-later service, add an item to an Amazon wishlist, or forward a link to Evernote. Fortunately, you can recreate the experience with a bookmarklet, and the tech blog Digital Inspiration has a huge collection of the most useful bookmarklets for your iOS device.
20 Safari Tips & Tricks! Secret Safari Hacks!
These bookmarklets install into Safari just like bookmarks, but they use a line of JavaScript to behave like an extension. You can usually grab them directly from most web services, but Digital Inspiration's list makes it incredibly easy to browse your options and install them on your iOS device. For example, if you use Pocket as a read-it-later service, you can install the Add to Pocket bookmarklet to instantly add pages to your Pocket, straight from Safari. Here's how:
Go to the Digital Inspiration main list and select the bookmarklet you want to install from Safari.
Tap the arrow button next to the URL bar and select 'Bookmark'.