Comment by _iven_

Bookmarklets can work in mobile browsers.

For mobile Chrome:

- Create a new bookmark

- Replace the bookmarked link with the bookmarklet javaScript code, e.g., javascript:alert('hello world')

- To use the bookmarklet, start typing the bookmark name in the address bar until the auto-complete displays the bookmark, and then click on it.

For mobile Safari,

- Create a new bookmark and replace the URL with your javaScript code

- To use the bookmarklet, tap on the bookmarklet name from the bookmarks menu

(The edit was to better format my comment)