You have JavaScript. You need a bookmarklet. This does that.

Create bookmarklets in your browser with a simple copy and paste.

https://chriszarate.github.io/bookmarkleter

npm install bookmarkleter

var bookmarkleter = require('./bookmarkleter');
var bookmarklet = bookmarkleter(code, options);

All options are Boolean flags.

• urlencode (default true): URL-encode reserved characters: [space], %, ", <, >, #, @, &, ?

• anonymize (default false): Wrap in an IIFE (anonymizing function) to prevent exposing variables to the page on which the bookmarklet is running.

• mangleVars (default false): Minify using UglifyJS to reduce the size of the bookmarklet.

• jQuery (default false): Make sure a modern version (>= 1.7) of jQuery is available for your code.

This is free software. It is released to the public domain without warranty.

Thanks to @jpillora for updates and contributions.