Creating a URL that always opens in Chrome
Google has official documentation on the Chrome iOS app’s URI scheme on its developer website.

Simply replace http with googlechrome and https with googlechromes. This means:


http://www.google.com/ becomes googlechrome://www.google.com/
https://apple.stackexchange.com/ becomes googlechromes://apple.stackexchange.com/


Previously, it supported an x-callback-url of googlechrome-x-callback://. This allowed the calling app to indicate its name and URI scheme to Chrome, which would show a back button in the address bar that closes the tab and invokes the specified URI. This feature was removed a few years ago when iOS 9 added the “Back to …” button in the status bar (but the URI scheme still works).