While working on a wordpress site I came across a problem to customize the file upload button in Contact Form 7 plugin. I tried a few tweaks using CSS to customize the button but no luck. Later I found a trick using CSS and jQuery which is explained below. In my previous article "How to display location of an user in a mail send using Contact Form 7 plugin by passing the IP address in a Wordpress Site?", I have explained about Contact Form 7 plugin.